publications

    Articles

  1. "Origins of clustered frequency combs in Kerr microresonators," N. L. B. Sayson, H. Pham, K. E. Webb, V. Ng, L. S. Trainor, H. G. L. Schwefel, S. Coen, M. Erkintalo, and S. G. Murdoch, Optics Letters, vol. 43, iss. 17, pp. 4180-4183. (2018) | www
  2. "Prism coupling of high-Q terahertz whispering-gallery-modes over two octaves from 0.2 THz to 1.1 THz," D. W. Vogt, A. H. Jones, H. G. L. Schwefel, and R. Leonhardt, Optics Express, vol. 26, iss. 24, pp. 31190-31198. (2018) | www
  3. "Towards terahertz detection and calibration through spontaneous parametric down-conversion in the terahertz idler-frequency range generated by a 795 nm diode laser system," V. V. Kornienko, G. K. Kitaeva, F. Sedlmeir, G. Leuchs, and H. G. L. Schwefel, APL Photonics, vol. 3, iss. 5, p. 051704. (2018) | www
  4. "Selective Coupling Enhances Harmonic Generation of Whispering-Gallery Modes," L. S. Trainor, F. Sedlmeir, C. Peuntinger, and H. G.  L. Schwefel, Physical Review Applied, vol. 9, iss. 2, p. 024007. (2018) | www
  5. "Sensitivity limits of millimeter-wave photonic radiometers based on efficient electro-optic upconverters," G. S. Botello, F. Sedlmeir, A. Rueda, K. A. Abdalmalak, E. R. Brown, G. Leuchs, S. Preu, D. Segovia-Vargas, D. V. Strekalov, L. E. G. Muñoz, and H. G. L. Schwefel, Optica, vol. 5, iss. 10, pp. 1210-1219. (2018) | www
  6. "Polarization-Selective Out-Coupling of Whispering-Gallery Modes," F. Sedlmeir, M. R. Foreman, U. Vogl, R. Zeltner, G. Schunk, D. V. Strekalov, C. Marquardt, G. Leuchs, and H. G.  L. Schwefel, Physical Review Applied, vol. 7, iss. 2, p. 024029. (2017) | www
  7. "Optical microcavities: new understandings and developments," L. Ge, L. Feng, and H. G. L. Schwefel, Photonics Research, vol. 5, iss. 6, p. om1-om3. (2017) | www
  8. "Dielectric tuning and coupling of whispering gallery modes using an anisotropic prism," M. R. Foreman, F. Sedlmeir, H. G. L. Schwefel, and G. Leuchs, JOSA B, vol. 33, iss. 11, pp. 2177-2195. (2016) | www
  9. "Nonlinear and quantum optics with whispering gallery resonators," D. V. Strekalov, C. Marquardt, A. B. Matsko, H. G. L. Schwefel, and G. Leuchs, Journal of Optics, vol. 18, iss. 12, p. 123002. (2016)
  10. "Frequency tuning of single photons from a whispering-gallery mode resonator to MHz-wide transitions," G. Schunk, U. Vogl, F. Sedlmeir, D. V. Strekalov, A. Otterpohl, V. Averchenko, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, Journal of Modern Optics, pp. 1-16. (2016) | www
  11. "Efficient microwave to optical photon conversion: an electro-optical realization," A. Rueda, F. Sedlmeir, M. C. Collodo, U. Vogl, B. Stiller, G. Schunk, D. V. Strekalov, C. Marquardt, J. M. Fink, O. Painter, G. Leuchs, and H. G. L. Schwefel, Optica, vol. 3, iss. 6, pp. 597-604. (2016) | www
  12. "Maximization of the optical intra-cavity power of whispering-gallery mode resonators via coupling prism," G. A. Santamaría-Botello, G. L. E. Muñoz, F. Sedlmeir, S. Preu, D. Segovia-Vargas, A. K. Abdalmalak, L. S. Romano, G. A. Lampérez, S. Malzer, G. H. Döhler, H. G. L. Schwefel, and H. B. Weber, Optics Express, vol. 24, iss. 23, pp. 26503-26514. (2016) | www
  13. "Dielectric Rod Waveguide Antenna as THz Emitter for Photomixing Devices," A. Rivera-Lavado, S. Preu, L. E. Garcia-Munoz, A. Generalov, J. Montero-de-Paz, G. Dohler, D. Lioubtchenko, M. Mendez-Aller, F. Sedlmeir, M. Schneidereit, H. G. L. Schwefel, S. Malzer, D. Segovia-Vargas, and A. V. Raisanen, IEEE Transactions on Antennas and Propagation, vol. 63, iss. 3, pp. 882-890. (2015)
  14. "A chaotic approach clears up imaging," H. G. L. Schwefel and H. E. Türeci, Science, vol. 348, iss. 6231, pp. 189-190. (2015) | www
  15. "Highly efficient generation of single-mode photon pairs from a crystalline whispering-gallery-mode resonator source," M. Förtsch, G. Schunk, J. U. Fürst, D. Strekalov, T. Gerrits, M. J. Stevens, F. Sedlmeir, H. G. L. Schwefel, S. W. Nam, G. Leuchs, and C. Marquardt, Physical Review A, vol. 91, iss. 2, p. 023812. (2015) | www
  16. "Intracavity Squeezing Can Enhance Quantum-Limited Optomechanical Position Detection through Deamplification," V. Peano, H.  G.  L. Schwefel, C. Marquardt, and F. Marquardt, Physical Review Letters, vol. 115, iss. 24, p. 243603. (2015) | www
  17. "Near-infrared single-photon spectroscopy of a whispering gallery mode resonator using energy-resolving transition edge sensors," M. Förtsch, T. Gerrits, M. J. Stevens, D. Strekalov, G. Schunk, J. U. Fürst, U. Vogl, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, S. W. Nam, and C. Marquardt, Journal of Optics, vol. 17, iss. 6, p. 065501. (2015) | www
  18. "Interfacing transitions of different alkali atoms and telecom bands using one narrowband photon pair source," G. Schunk, U. Vogl, D. V. Strekalov, M. Förtsch, F. Sedlmeir, H. G. L. Schwefel, M. Göbelt, S. Christiansen, G. Leuchs, and C. Marquardt, Optica, vol. 2, iss. 9, pp. 773-778. (2015) | www
  19. "Crystalline MgF2 whispering gallery mode resonators for enhanced bulk index sensitivity," R. Zeltner, F. Sedlmeir, G. Leuchs, and H. G. L. Schwefel, The European Physical Journal Special Topics, vol. 223, iss. 10, pp. 1989-1994. (2014) | www
  20. "In optical pumping, less can be more," H. G. L. Schwefel, Science, vol. 346, iss. 6207, pp. 304-305. (2014) | www
  21. "Taking detection to the limit with optical microcavities: Recent advances presented at the 560. WE-Heraeus Seminar," F. Vollmer and H. G. L. Schwefel, The European Physical Journal Special Topics, vol. 223, iss. 10, pp. 1907-1916. (2014) | www
  22. "Sub-kHz lasing of a CaF2 whispering gallery mode resonator stabilized fiber ring laser," M. C. Collodo, F. Sedlmeir, B. Sprenger, S. Svitlov, L. J. Wang, and H. G. L. Schwefel, Optics Express, vol. 22, iss. 16, pp. 19277-19283. (2014) | www
  23. "Identifying modes of large whispering-gallery mode resonators from the spectrum and emission pattern," G. Schunk, J. U. Fürst, M. Förtsch, D. V. Strekalov, U. Vogl, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, Optics Express, vol. 22, iss. 25, pp. 30795-30806. (2014) | www
  24. "Highly efficient generation of single-mode photon pairs using a crystalline whispering gallery mode resonator," M. Förtsch, G. Schunk, J. U. Fürst, D. Strekalov, T. Gerrits, M. J. Stevens, F. Sedlmeir, H. G. L. Schwefel, S. W. Nam, G. Leuchs, and C. Marquardt, arXiv:1404.0593 [physics, physics:quant-ph], submitted to PRL. (2014) | www
  25. "High-Q MgF2 whispering gallery mode resonators for refractometric sensing in aqueous environment," F. Sedlmeir, R. Zeltner, G. Leuchs, and H. G. L. Schwefel, Optics Express, vol. 22, iss. 25, pp. 30934-30942. (2014) | www
  26. "Experimental characterization of an uniaxial angle cut whispering gallery mode resonator," F. Sedlmeir, M. Hauer, J. U. Fürst, G. Leuchs, and H. G. L. Schwefel, Optics Express, vol. 21, iss. 20, pp. 23942-23949. (2013) | www
  27. "Whispering gallery modes at the rim of an axisymmetric optical resonator: Analytical versus numerical description and comparison with experiment," I. Breunig, B. Sturman, F. Sedlmeir, H. G. L. Schwefel, and K. Buse, Optics Express, vol. 21, iss. 25, pp. 30683-30692. (2013) | www
  28. "Finite element simulation of a perturbed axial-symmetric whispering-gallery mode and its use for intensity enhancement with a nanoparticle coupled to a microtoroid," A. Kaplan, M. Tomes, T. Carmon, M. Kozlov, O. Cohen, G. Bartal, and H. G. L. Schwefel, Optics Express, vol. 21, iss. 12, pp. 14169-14180}. (2013) | www
  29. "Directional emission of dielectric disks with a finite scatterer in the THz regime," S. Preu, S. I. Schmid, F. Sedlmeir, J. Evers, and H. G. L. Schwefel, Optics Express, vol. 21, iss. 14, pp. 16370-16380. (2013) | www
  30. "Narrow-bandwidth high-order harmonics driven by long-duration hot spots," M. Kozlov, O. Kfir, A. Fleischer, A. Kaplan, T. Carmon, H. G. L. Schwefel, G. Bartal, and O. Cohen, New Journal of Physics, vol. 14, iss. 6, p. 063036. (2012) | www
  31. "Quick root searching method for resonances of dielectric optical microcavities with the boundary element method," C.-L. Zou, H. G. L. Schwefel, F.-W. Sun, Z.-F. Han, and G.-C. Guo, Optics Express, vol. 19, iss. 17, pp. 15669-15678},. (2011) | www
  32. "Broadband NIR photoluminescence from Bi-doped Ba2P2O7 crystals: Insights into the nature of NIR-emitting Bismuth centers," M. Peng, B. Sprenger, M. A. Schmidt, H. G. L. Schwefel, and L. Wondraczek, Optics Express, vol. 18, iss. 12, pp. 12852-12863. (2010) | www
  33. "CaF_2 whispering-gallery-mode-resonator stabilized-narrow-linewidth laser," B. Sprenger, H. G. L. Schwefel, Z. H. Lu, S. Svitlov, and L. J. Wang, Optics Letters, vol. 35, iss. 17, pp. 2870-2872. (2010) | www
  34. "Whispering-gallery-mode-resonator-stabilized narrow-linewidth fiber loop laser," B. Sprenger, H. G. L. Schwefel, and L. J. Wang, Optics Letters, vol. 34, iss. 21, pp. 3370-3372},. (2009) | www
  35. "Microwave whispering-gallery resonator for efficient optical up-conversion," D. V. Strekalov, H. G. L. Schwefel, A. A. Savchenkov, A. B. Matsko, L. J. Wang, and N. Yu, Physical Review A, vol. 80, iss. 3, pp. 033810-5},. (2009) | www
  36. "An improved method for calculating resonances of multiple dielectric disks arbitrarily positioned in the plane," H. G. L. Schwefel and C. G. Poulton, Optics Express, vol. 17, iss. 15, pp. 13178-13186},. (2009) | www
  37. "Coupled whispering gallery mode resonators in the Terahertz frequency range," S. Preu, H. G. L. Schwefel, S. Malzer, G. H. Döhler, L. J. Wang, M. Hanson, J. D. Zimmerman, and A. C. Gossard, Optics Express, vol. 16, iss. 10, p. 7336. (2008) | www
  38. "Direct experimental observation of the single reflection optical Goos-Hänchen shift," H. G. L. Schwefel, W. Köhler, Z. H. Lu, J. Fan, and L. J. Wang, Optics Letters, vol. 33, iss. 8, pp. 794-796. (2008) | www
  39. "Static envelope patterns in composite resonances generated by level crossing in optical toroidal microcavities," T. Carmon, H. G. L. Schwefel, L. Yang, M. Oxborrow, A. D. Stone, and K. J. Vahala, Physical Review Letters, vol. 100, p. 103905. (2008) | www
  40. "An efficient Fredholm method for the calculation of highly excited states of billiards," H. E. Türeci and H. G. L. Schwefel, Journal Of Physics A-Mathematical And Theoretical, vol. 40, pp. 13869-13882. (2007)
  41. "Polarization properties and dispersion relations for spiral resonances of a dielectric rod," H. G. L. Schwefel, A. D. Stone, and H. E. Türeci, Journal Of The Optical Society Of America B, vol. 22, pp. 2295-2307. (2005) | www
  42. "Dramatic shape sensitivity of directional emission patterns from similarly deformed cylindrical polymer lasers," H. G. L. Schwefel, N. B. Rex, H. E. Tureci, R. K. Chang, D. A. Stone, T. Ben-Messaoud, and J. Zyss, Journal of the Optical Society of America B, vol. 21, iss. 5, pp. 923-934, }. (2004) | www
  43. "Fresnel filtering in lasing emission from scarred modes of wave-chaotic optical resonators," N. B. Rex, H. E. Türeci, H. G. L. Schwefel, R. K. Chang, and A. D. Stone, Physical Review Letters, vol. 88, p. 094102. (2002) | www
  44. "Gaussian-optical approach to stable periodic orbit resonances of partially chaotic dielectric micro-cavities," H. Türeci, H. G. L. Schwefel, A. Stone, and E. Narimanov, Optics Express, vol. 10, iss. 16, pp. 752-776. (2002) | www
  45. Chapters in books

  46. H. E. Türeci, H. G. L. Schwefel, P. Jacquod, and A. D. Stone, "Modes of wave-chaotic dielectric resonators," Wolf, E., Ed., Elsevier, 2005, vol. 47.
  47. H. G. L. Schwefel, H. E. Türeci, D. A. Stone, and R. K. Chang, "Progress in Asymmetric Resonant Cavities: Using shape as a design parameter in dielectric microcavity lasers," Vahala, K., Chang, R. K., and Campillo, A. J., Eds., Singapore: World Scientific, 2005, vol. 5.
  48. Proceedings and Presentations

  49. "Harmonic Generation in Crystalline Whispering Gallery Mode Resonators," L. S. Trainor, C. Peuntinger, F. Sedlmeir, and H. G. L. Schwefel, in Proc. Proceedings of the 10th Annual Dodd-Walls Symposium, 2017}. | www
  50. "Efficient microwave to optical photon conversion: an electro-optical realisation," A. Rueda, F. Sedlmeir, M. C. Collodo, U. Vogl, B. Stiller, G. Schunk, D. Strekalov, C. Marquardt, J. M. Fink, O. Painter, G. Leuchs, and H. G. L. Schwefel, in Proc. 47th Winter Conference on the Physics of Quantum Electronics, 2017}. | www
  51. "Electro-optical modulator with 0.1\% quantum efficiency," A. Rueda, F. Sedlmeir, and H. G. L. Schwefel, in Proc. The 4$^{th}$ Advanced Electromagentics Symposium -- AES 2016 Malaga, Spain, 2016}. | www
  52. "Efficient single sideband microwave to optical conversion using a nonlinear WGM-resonator," A. Rueda, F. Sedlmeir, G. Leuchs, and H. G. L. Schwefel, in Proc. Matariki Workshop on Quantum Science, 2016}. | www
  53. "Coherent up-conversion of microwave \& THz radiation into the telecom regime -- towards the fundamental limit --," A. Rueda, F. Sedlmeir, G. Leuchs, and H. G. L. Schwefel, in Proc. Matariki Workshop on Quantum Science, 2016}. | www
  54. "Efficient microwave to optical photon conversion: An electro-optical approach," F. Sedlmeir, A. R., and H. G. L. Schwefel, in Proc. Proceedings of the 9th Annual Dodd-Walls Symposium, 2016}. | www
  55. "Third harmonic generation in Birefringent WGM resonators," F. Sedlmeir, C. Peuntigner, M. Hauer, and H. G. L. Schwefel, in Proc. Matariki Workshop on Quantum Science, 2016}. | www
  56. "Interfacing Atomic Transitions with Single Photons," G. Schunk, G. Shafiee, U. Vogl, D. V. Strekalov, M. Förtsch, A. Otterpohl, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, in Proc. Laser Physics -- LPHYS2016, 2016}. | www
  57. "Third Harmonic Generation in Birefringent WGM Resonators: A Survey of Possible Geometries," C. Peuntinger, L. Trainor, F. Sedlmeir, M. Hauer, D. Strekalov, and H. G. L. Schwefel, in Proc. Photonics and {Fiber} {Technology} 2016 ({ACOFT}, {BGPP}, {NP}) (2016), paper {JT}4A.24, 2016, p. 4. | text_html | www
  58. "Efficient single sideband microwave to optical conversion using a {LiNbO}$_3$ {WGM}-resonator," A. R. Rueda Sanchez, F. Sedlmeir, M. Collodo, U. Vogl, B. Stiller, G. Schunk, D. Strekalov, C. Marquardt, J. Fink, O. Painter, G. Leuchs, and H. G. L. Schwefel, , 2016, p. 2. | www
  59. "Towards two-photon interference with a whispering gallery photon pair source," G. Schunk, G. Shafiee, U. Vogl, D. Strekalov, A. Otterpohl, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, in Proc. Photonics and {Fiber} {Technology} 2016 ({ACOFT}, {BGPP}, {NP}) (2016), paper {NTh}2A.5, 2016, p. 2. | text_html | www
  60. "Towards and beyond squeezed vacuum states in a nonlinear crystalline whispering gallery mode resonator," A. Otterpohl, G. Schunk, U. Vogl, F. Sedlmeir, G. Shafiee, D. Strekalov, T. Gehring, H. G. L. Schwefel, U. L. Andersen, G. Leuchs, and C. Marquardt, in Proc. Verhandlungen der DPG, 2016, p. 42. | www
  61. "Nonlinear single sideband microwave to optical conversion using an electro-optic {WGM}-resonator," A. Rueda, F. Sedlmeir, M. C. Collodo, U. Vogl, B. Stiller, G. Schunk, D. Strekalov, C. Marquardt, J. M. Fink, O. Painter, G. Leuchs, and H. G. L. Schwefel, in Proc. Photonics and {Fiber} {Technology} 2016 ({ACOFT}, {BGPP}, {NP}) (2016), paper {NTh}3A.6, 2016, p. 3. | text_html | www
  62. "Microwave to telecom electro-optic upconversion," A. Rueda, F. Sedlmeir, M. C. Collodo, U. Vogl, B. Stiller, G. Schunk, D. Strekalov, C. Marquardt, J. M. Fink, O. Painter, G. Leuchs, and H. G. L. Schwefel, in Proc. 23rd Central European Workshop on Quantum Optics -- Crete, Greece, 2016. | www
  63. "Two-photon interference with a non-degenerate photon-pair source," G. Schunk, G. Shafiee, U. V., D. Strekalov, A. Otterpohl, N. Soltani, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, in Proc. Verhandlungen der DPG, 2016, p. 42. | www
  64. "Sub-{THz} photon counting receiver working at room temperature for polarization measurements of the cosmic microwave background radiation," G. Santamaría-Botello, A. Rivera-Lavado, S. Preu, F. Sedlmeir, D. Lioubtchenko, H. Schwefel, D. Segovia-Vargas, and L. E. G. Muñoz, in Proc. 2016 10th {European} {Conference} on {Antennas} and {Propagation} ({EuCAP}), 2016, pp. 1-5. | application_pdf
  65. "Efficient {Up}-{Conversion} of {Weak} {THz} {Signals} into the {Optical} {Domain} {Using} a {Whispering} {Gallery} {Mode} {Resonator}," F. Sedlmeir, A. R. Rueda Sanchez, S. Preu, E. Garcia, and H. G. L. Schwefel, , 2016, p. 1. | www
  66. "Efficient and Coherent Conversion of 80 GHz Signals into the Optical Domain Using a Nonlinear Whispering Gallery Mode Resonator," F. Sedlmeir, A. Rueda, S. Preu, E. L. Garçia-Muñoz, and H. G. L. Schwefel, in Proc. Photonics and {Fiber} {Technology} 2016 ({ACOFT}, {BGPP}, {NP}) (2016), paper {NTh}3A.4, 2016, p. 3. | text_html | www
  67. "Nonlinear {Quantum} {Optics} in a {Millimeter} {Size} {Whispering} {Gallery} {Mode} {Resonator}," G. Leuchs, C. Marquardt, and H. G. Schwefel, , 2015, p. 2. | application_pdf | www
  68. "Small refractive index, high performance: magnesium fluoride whispering gallery mode resonators for refractometric sensing," F. Sedlmeir, R. Zeltner, G. Leuchs, and H. G. L. Schwefel, in Proc. 2015 {European} {Conference} on {Lasers} and {Electro}-{Optics} - {European} {Quantum} {Electronics} {Conference} (2015), paper {CH}\_P\_23, 2015, p. 23. | text_html | www
  69. "Addressing {Rb} and {Cs} transitions with a tunable source of photon pairs," G. Schunk, U. Vogl, M. Förtsch, D. Strekalov, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, in Proc. 2015 {European} {Conference} on {Lasers} and {Electro}-{Optics} - {European} {Quantum} {Electronics} {Conference} (2015), paper {EB}\_3\_1, 2015, p. 3. | text_html | www
  70. "Efficient up- and downconversion of microwave signals into the optical regime using a whispering gallery mode resonators," F. Sedlmeir, M. Schneidereit, S. Preu, M. M., A. Räisänen, L. E. García-Muñoz, G. Leuchs, and H. G. L. Schwefel, in Proc. 45$^{th}$ Winter Conference on the Physics of Quantum Electronics, 2015. | www
  71. "Efficient up- and downconversion of microwave signals into the optical domain," A. Rueda, F. Sedlmeir, M. Collodo, D. Strekalov, F. J., C. Marquardt, O. Painter, G. Leuchs, and H. G. L. Schwefel, in Proc. 45$^{th}$ Winter Conference on the Physics of Quantum Electronics, 2015. | www
  72. "Room Temperature Receiver based on Whispering Gallery Mode Resonators for Radio Astronomy Applications," M. M., L. E. García-Muñoz, H. G. L. Schwefel, F. Sedlmeir, M. Schneidereit, A. R., and D. Segovia-Vargas, in Proc. EOS 2014, Italy, 2014. | www
  73. "Mode spectrum and emission pattern of whispering gallery mode disk resonators," G. Schunk, M. Förtsch, J. Fürst, D. Strekalov, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, in Proc. Verhandlungen der DPG, 2014, p. 38. | www
  74. "Angle cut, birefrigent whispering gallery mode resonators," F. Sedlmeir, M. Hauer, J. Fürst, G. Leuchs, and H. G. L. Schwefel, in Proc. Verhandlungen der DPG, 2014, p. 67. | www
  75. "Sum and Difference Frequency Generation of Optical and Microwave Photons in a Whispering Gallery Mode Resonator," F. Sedlmeir, M. Schneidereit, S. Preu, M. M., A. Räisänen, L. E. García-Muñoz, G. Leuchs, and H. G. L. Schwefel, in Proc. Frontiers in Optics, Tucson, USA, 2014. | www
  76. "Interfacing various atomic transitions and telecom wavelengths with a single tunable narrowband photon-pair source," G. Schunk, U. Vogl, M. Förtsch, D. V. Strekalov, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, in Proc. Quantum Communication, Measurement and Computing --QCMC, Hefei, China, 2014.
  77. "Mode spectrum and emission patterns of large whispering gallery mode resonators," G. Schunk, M. Förtsch, J. Fürst, D. Strekalov, F. Sedlmeir, H. G. L. Schwefel, G. Leuchs, and C. Marquardt, in Proc. Laser Physics, 2014. | www
  78. "Highly efficient generation of narrow-band single-mode photons from a whispering gallery mode resonator," M. Förtsch, G. Schunk, J. Fürst, F. Sedlmeir, D. V. Strekalov, H. G. L. Schwefel, T. Gerrits, M. J. Stevens, S. W. Nam, G. Leuchs, and C. Marquard, in Proc. CLEO 2014 Conference Digest, 2014, p. thg3-1}. | www
  79. "Crystalline MgF2 whispering gallery mode resonators for enhanced bulk index sensitivity," R. Zeltner, F. Sedlmeir, G. Leuchs, and H. G. L. Schwefel, in Proc. Taking Detection to the Limit: Biosensing with optical Microcavities, WE-Heraeus Seminar #560, 2014.
  80. "Refractometric Sensing with Crystalline MgF2 Whispering Gallery Mode Resonators," R. Zeltner, F. Sedlmeir, G. Leuchs, and H. G. L. Schwefel, in Proc. Frontiers in Optics, Tucson, USA, 2014.
  81. "Waveguide coupling of high index whispering gallery mode resonators in the THz domain," M. F. Schneidereit, F. Sedlmeir, S. Preu, A. V. Raisanen, L. E. García-Muñoz, G. Leuchs, and H. G. L. Schwefel, in Proc. Verhandlungen der DPG, 2014, p. 61. | www
  82. "Increasing quality through the surrounding: Whispering gallery mode resonators and their environment," R. Zeltner, F. Sedlmeir, G. Leuchs, and H. G. L. Schwefel, in Proc. Verhandlungen der DPG, 2014, p. 30. | www
  83. "Single-mode photon pairs from a crystalline whispering gallery mode resonator," M. Förtsch, G. Schunk, J. Fürst, F. Sedlmeir, D. V. Strekalov, H. G. L. Schwefel, T. Gerrits, M. J. Stevens, S. W. Nam, G. Leuchs, and C. Marquard, in Proc. Quantum Communication, Measurement and Computing --QCMC, Hefei, China, 2014.
  84. "Novel Types of Nonlinear Enhancement in Uniaxial Crystalline Whispering-Gallery Mode Resonators," M. Hauer, F. Sedlmeir, J. Fürst, G. Leuchs, and H. G. L. Schwefel, in Proc. Photon14, London, 2014.
  85. "Wavelength tunability of a triply resonant whispering gallery optical parametric oscillator," G. Schunk, M. Förtsch, J. Fürst, D. Strekalov, F. Sedlmeir, H. G. L. Schwefel, C. Marquardt, and G. Leuchs, in Proc. Verhandlungen der DPG, 2013, p. 54. | www
  86. "Near-Infrared Spectroscopy on a Single Photon Level," M. Förtsch, T. Gerrits, M. J. Stevens, J. Fürst, G. Schunk, F. Sedlmeir, H. G. L. Schwefel, D. V. Strekalov, S. W. Nam, G. Leuchs, and C. Marquard, in Proc. CLEO Pacific Rim 2013 Conference Digest, 2013, p. thg3-1}.
  87. "Complex polarization in non z-cut whispering gallery mode resonators," F. Sedlmeir, M. Hauer, J. Fürst, D. V. Strekalov, and H. G. L. Schwefel, in Proc. {CLEO/ Europe} and {EQEC} 2013 Conference Digest, 2013, p. 9. | www
  88. "Directional emission of dielectric disks with a finite scatterer in the THz regime," J. Evers, S. I. Schmid, Preu Sascha, F. Sedlmeir, and H. G. L. Schwefel, in Proc. Verhandlungen der DPG, 2013, p. 16. | www
  89. "Complex polarization states of off-axis uniaxial whispering gallery mode resonators," F. Sedlmeir, M. Hauer, J. U. Fürst, D. V. Strekalov, and H. G. L. Schwefel, , 2013, p. 86001b-86001b. | www
  90. "Whispering Gallery Mode Resonator based Optica up-conversion of cw-THz radiation," H. G. L. Schwefel, F. Sedlmeir, S. Preu, S. Bauerschmidt, S. Malzer, D. V. Strekalov, G. H. Döhler, and G. Leuchs, in Proc. TERA-2012, 2012.
  91. "Towards highly efficient whispering gallery supported THz detection," F. Sedlmeir, D. V. Strekalov, S. Bauerschmidt, S. Preu, S. Malzer, G. H. Döhler, H. G. L. Schwefel, and G. Leuchs, in Proc. Verhandlungen der DPG, 2012, p. 54. | www
  92. "Widely tunable and compact optical parametric oscillator based on a whispering gallery mode resonator," M. J. Förtsch, G. Schunk, F. Sedlmeir, J. Fürst, C. Wittmann, D. Strekalov, H. G. L. Schwefel, C. Marquardt, and G. Leuchs, in Proc. Verhandlungen der DPG, 2012, p. 40. | www
  93. "Passive Ring-Laser Stabilization to Sub-kHz Linewidths with Whispering Gallery Mode Resonators," M. C. Collodo, B. Sprenger, F. Sedlmeir, S. Svitlov, H. G. L. Schwefel, and L. J. Wang, in Proc. Verhandlungen der DPG, 2012, p. 28. | www
  94. "Elliptically polarized whispering gallery modes in uniaxial crystal resonators," F. Sedlmeir, J. Fürst, D. V. Strekalov, G. H. Döhler, H. G. L. Schwefel, and G. Leuchs, in Proc. Frontiers in Optics, 2012. | www
  95. "Mode-hop-free tunable optical parametric oscillator utilizing a whispering gallery mode resonator," M. J. Förtsch, G. Schunk, F. Sedlmeir, J. Fürst, C. Wittmann, D. Strekalov, H. G. L. Schwefel, C. Marquardt, and G. Leuchs, in Proc. {CLEO:} Science and Innovations, 2012, p. 3. | www
  96. "Coupling and perturbing resonances of Whispering Gallery Mode resonators in the THz domain," S. Preu, S. I. Schmid, F. Sedlmeir, S. Preu, S. Malzer, G. H. Döhler, H. G. L. Schwefel, and G. Leuchs, in Proc. TERA-2012, 2012.
  97. "Sub-{kHz} Linewidth of Crystalline Whispering Gallery Mode Resonator Stabilized Ring-Laser," M. C. Collodo, B. Sprenger, F. Sedlmeir, S. Svitlov, H. G. L. Schwefel, and L. J. Wang, in Proc. {CLEO:} Science and Innovations, 2012, p. 3. | www
  98. "Terahertz Detection via Upconversion to the IR by Coherent Sum-Frequency Generation," F. Sedlmeir, H. G. L. Schwefel, D. V. Strekalov, S. Bauerschmidt, S. Preu, S. Malzer, G. H. Döhler, and G. Leuchs, in Proc. {CLEO/ Europe} and {EQEC} 2011 Conference Digest, 2011. | www
  99. "Crystalline Whispering Gallery Mode Stabilized Ring-Laser," M. Collodo, B. Sprenger, F. Sedlmeir, H. G. L. Schwefel, and L. J. Wang, in Proc. {CLEO/ Europe} and {EQEC} 2011 Conference Digest, 2011, p. 4. | www
  100. "Towards single THz Photon detection via multi-resonant whispering gallery mode resonator," F. Sedlmeir, S. Bauerschmidt, S. Preu, S. I. Schmid, J. Evers, S. Malzer, D. V. Strekalov, G. H. Döhler, H. G. L. Schwefel, and G. Leuchs, in Proc. Micro \& macro-cavities in classical and non-classical light, 2011. | www
  101. "Efficient Optical Up-Conversion by Coherent Sum-Frequency Generation for Highly Sensitive Terahertz Detection," F. Sedlmeir, H. G. L. Schwefel, D. V. Strekalov, S. Bauerschmidt, S. Preu, S. Malzer, G. H. Döhler, and G. Leuchs, in Proc. {CLEO/ Europe} and {EQEC} 2011 Conference Digest, 2011, p. 4. | www
  102. "Triple-resonant whispering gallery mode resonators for THz photons visualization by up conversion," H. G. L. Schwefel, D. V. Strekalov, F. Sedlmeir, S. Preu, S. Bauerschmidt, S. Malzer, G. H. Döhler, and G. Leuchs, in Proc. 41$^{st}$ Winter Conference on the Physics of Quantum Electronics, 2011. | www
  103. "Crystalline Whispering Gallery Mode Stabilized Ring-Laser," M. Collodo, B. Sprenger, F. Sedlmeir, H. G. L. Schwefel, and L. J. Wang, in Proc. Micro \& macro-cavities in classical and non-classical light, 2011. | www
  104. "Directional emission from Terahertz whispering gallery mode resonators," H. G. L. Schwefel, S. Preu, S. Bauerschmidt, S. Malzer, G. H. Döhler, L. Hong, A. C. Cossard, and L. J. Wang, in Proc. {Verhandlungen der DPG}, 2010. | www
  105. "Directional emission from Terahertz whispering gallery mode resonators," H. G. L. Schwefel, S. Preu, S. Bauerschmidt, S. Malzer, G. H. Döhler, H. Lu, A. C. Gossard, and L. J. Wang, in Proc. Verhandlungen der DPG, 2010. | www
  106. "Emitter of Continues-Wave, Highly Coherent, Extreme Ultraviolet Radiation that is Driven by Low-Power Laser," M. Kozlov, O. Cohen, T. Carmon, and H. G. L. Schwefel, in Proc. Conference on Lasers and Electro-Optics, 2010, p. I. | www
  107. "Three-Cornered-Hat Measurement of a Whispering Gallery Mode Stabilized Laser," B. Sprenger, H. G. L. Schwefel, Z. H. Lu, S. Svitlov, and L. J. Wang, in Proc. Frontiers in Optics, 2010, p. 1. | www
  108. "High-Order Harmonics of a Continuous-Wave Driving Laser," M. Kozlov, O. Kfir, A. Fleischer, T. Carmon, H. G. L. Schwefel, and O. Cohen, in Proc. Frontiers in Optics, 2010, p. 2. | www
  109. "Frequency Stable Fiber Ring Laser based on Whispering Gallery Mode Resonators," B. Sprenger, H. G. L. Schwefel, and L. J. Wang, in Proc. Verhandlungen der DPG, 2010. | www
  110. "CaF_2 Whispering Gallery Mode Resonator Stabilized Laser," B. Sprenger, H. G. L. Schwefel, Z. H. Lu, S. Svitlov, and L. J. Wang, in Proc. Nanophotonics meets Quantum Optics, 2010.
  111. "Auto-Stabilization of Ring Lasers Based on Whispering Gallery Mode Resonators," B. Sprenger, H. G. L. Schwefel, and L. J. Wang, in Proc. Conference on Lasers and Electro-Optics, 2010, p. 7. | www
  112. "Spherical Microcavity Stabilization of a Fiber Loop Laser," B. Sprenger, H. G. L. Schwefel, and L. J. Wang, in Proc. Frontiers in Optics, 2009, p. 2. | www
  113. "High Frequency Resonances in Clusters of Dielectric Discs," H. G. L. Schwefel and C. G. Poulton, in Proc. PECS-VIII, 2009. | www
  114. "Whispering gallery mode microresonator stabilized fiber loop laser," B. Sprenger, H. G. L. Schwefel, and L. J. Wang, in Proc. CLEO Europe, 2009.
  115. "Random dielectric nano disks: an efficient multipole approach," H. G. L. Schwefel and C. G. Poulton, in Proc. nanometer: The 2$^{nd}$ European Topical Meeting on Nanophotonics and Metamaterials, 2009, p. 4.
  116. "Dielectric Microcavities for THz Radiation: Identical Mode Spectrum and Coupling in Polyethylene Disks," S. Preu, H. G. L. Schwefel, S. Malzer, G. H. Döhler, and L. Wang, in Proc. CLEO/QELS, 2008, p. 131. | www
  117. "Level Crossing in Toroidal On-Chip Microcavities," H. G. L. Schwefel, L. Yang, M. Oxborrow, D. A. Stone, K. J. Vahala, and T. Carmon, in Proc. Laser Science XXIV, 2008, p. 4. | www
  118. "Numerically efficient multipole method for photonic molecules," H. G. L. Schwefel, C. G. Poulton, and L. J. Wang, in Proc. Transparent Optical Networks, 2008. ICTON 2008., 2008, pp. 230-233. | www
  119. "Spectroscopy of Photonic Molecules in the Terahertz Range," H. G. L. Schwefel, S. Preu, S. Malzer, G. H. Döhler, and L. Wang, in Proc. Frontiers in Optics, 2008, p. 5. | www
  120. "Direct high precision measurement of optical Goos-Hänchen Shift," H. G. L. Schwefel, W. Köhler, Z. H. Lu, L. J. Wang, and J. Fan, in Proc. {CLEO/ Europe} and {IQEC} 2007 Conference Digest, 2007, p. I. | www
  121. "A Fast Fredholm method for Quantum Billiards," H. G. L. Schwefel and H. E. Türeci, in Proc. Nodal patterns in physics and mathematics: A workshop to celebrate Chladni's 250$^{th}$ birthday, 2006.
  122. "Efficient Boundary Integral Method for Quantum Billiards," H. G. L. Schwefel, H. E. Türeci, and D. A. Stone, in Proc. APS March Meeting, 2006, p. 27. | www
  123. "Mode Competition and Output Power from Regular and Chaotic Dielectric Cavity Lasers," D. A. Stone, H. E. Türeci, and H. G. L. Schwefel, in Proc. Frontiers in Optics, 2005, p. 1. | www
  124. "Focusing light with unstable manifolds," H. G. L. Schwefel, H. E. Türeci, R. K. Chang, and A. D. Stone, in Proc. Minisymposium: Nonlinear Quantum Dynamics, 2005.
  125. "Vector Quantum Chaos in a Dielectric Rod," H. G. L. Schwefel, H. E. Türeci, and A. D. Stone, in Proc. Aspects of Quantum Chaotic Scattering, 2005.
  126. "Deformed microdisk lasers and refractive billiards," H. E. Türeci, N. B. Rex, H. G. L. Schwefel, R. K. Chang, and D. A. Stone, in Proc. APS March Meeting, 2002, p. 27. | www
  127. "Lasing emission from stable and unstable modes of deformed {GaN} microdisks," H. E. Türeci, N. B. Rex, H. G. L. Schwefel, R. K. Chang, and A. D. Stone, in Proc. {CLEO/ QELS}, 2002, pp. 23-24}. | www
  128. "Chaos brought to light: Microcavity Laser," H. E. Türeci, H. G. L. Schwefel, A. D. Stone, N. B. Rex, and R. K. Chang, , 2002.
  129. "Dramatic shape sensitivity of emission patterns for similarly deformed cylindrical polymer lasers," H. G. L. Schwefel, N. B. Rex, H. E. Türeci, R. K. Chang, and A. D. Stone, in Proc. CLEO/QELS, 2002, pp. 24-25. | www
  130. "Nonrefractive Emission from Scarred States," H. G. L. Schwefel, H. T. E., N. B. Rex, R. K. Chang, and A. D. Stone, in Proc. Complexity from Microscopic to Macroscopic Scales: Coherence and Large Deviations, 2001.
  131. "Chaos brought to light: Microcavity Resonators," H. E. Türeci, H. G. L. Schwefel, and A. D. Stone, , 2001.
  132. Phd Thesis

  133. H. G. L. Schwefel, "Directionality and Vector Resonances of Regular and Chaotic Dielectric Microcavities," PhD Thesis, 2004. | www