Nonlinear excitation of polariton cavity modes in ZnO single nanocombs
Tunable second harmonic (SH) polaritons have been efficiently generated in ZnO nanocombs, when the material is excited close to half of the band-gap. The nonlinear signal couples to the nanocavity modes, and, as a result, Fabry-Pérot resonances with high Q factors of about 500 are detected. Due to t...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_10944087_v22_n5_p5341_Capeluto |
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todo:paper_10944087_v22_n5_p5341_Capeluto2023-10-03T16:05:13Z Nonlinear excitation of polariton cavity modes in ZnO single nanocombs Capeluto, M.G. Grinblat, G. Tirado, M. Comedi, D. Bragas, A.V. Energy gap Phase matching Phonons Photons Polarization Q factor measurement Refractive index Zinc oxide Effective volume Input polarization Intensity dependence Nonlinear excitation Nonlinear signals Phase matching conditions Polarization contrast Second harmonics Quantum theory Tunable second harmonic (SH) polaritons have been efficiently generated in ZnO nanocombs, when the material is excited close to half of the band-gap. The nonlinear signal couples to the nanocavity modes, and, as a result, Fabry-Pérot resonances with high Q factors of about 500 are detected. Due to the low effective volume of the confined modes, matterlight interaction is very much enhanced. This effect lowers the velocity of the SH polariton in the material by 50 times, and increases the SH confinement inside the nanocavity due to this higher refractive index. We also show that the SH phase-matching condition is achieved through LOphonon mediation. Finally, birrefringence of the crystal produces a strong SH intensity dependence on the input polarization, with a high polarization contrast, which could be used as a mechanism for light switching in the nanoscale. © 2014 Optical Society of America. Fil:Capeluto, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bragas, A.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10944087_v22_n5_p5341_Capeluto |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Energy gap Phase matching Phonons Photons Polarization Q factor measurement Refractive index Zinc oxide Effective volume Input polarization Intensity dependence Nonlinear excitation Nonlinear signals Phase matching conditions Polarization contrast Second harmonics Quantum theory |
| spellingShingle |
Energy gap Phase matching Phonons Photons Polarization Q factor measurement Refractive index Zinc oxide Effective volume Input polarization Intensity dependence Nonlinear excitation Nonlinear signals Phase matching conditions Polarization contrast Second harmonics Quantum theory Capeluto, M.G. Grinblat, G. Tirado, M. Comedi, D. Bragas, A.V. Nonlinear excitation of polariton cavity modes in ZnO single nanocombs |
| topic_facet |
Energy gap Phase matching Phonons Photons Polarization Q factor measurement Refractive index Zinc oxide Effective volume Input polarization Intensity dependence Nonlinear excitation Nonlinear signals Phase matching conditions Polarization contrast Second harmonics Quantum theory |
| description |
Tunable second harmonic (SH) polaritons have been efficiently generated in ZnO nanocombs, when the material is excited close to half of the band-gap. The nonlinear signal couples to the nanocavity modes, and, as a result, Fabry-Pérot resonances with high Q factors of about 500 are detected. Due to the low effective volume of the confined modes, matterlight interaction is very much enhanced. This effect lowers the velocity of the SH polariton in the material by 50 times, and increases the SH confinement inside the nanocavity due to this higher refractive index. We also show that the SH phase-matching condition is achieved through LOphonon mediation. Finally, birrefringence of the crystal produces a strong SH intensity dependence on the input polarization, with a high polarization contrast, which could be used as a mechanism for light switching in the nanoscale. © 2014 Optical Society of America. |
| format |
JOUR |
| author |
Capeluto, M.G. Grinblat, G. Tirado, M. Comedi, D. Bragas, A.V. |
| author_facet |
Capeluto, M.G. Grinblat, G. Tirado, M. Comedi, D. Bragas, A.V. |
| author_sort |
Capeluto, M.G. |
| title |
Nonlinear excitation of polariton cavity modes in ZnO single nanocombs |
| title_short |
Nonlinear excitation of polariton cavity modes in ZnO single nanocombs |
| title_full |
Nonlinear excitation of polariton cavity modes in ZnO single nanocombs |
| title_fullStr |
Nonlinear excitation of polariton cavity modes in ZnO single nanocombs |
| title_full_unstemmed |
Nonlinear excitation of polariton cavity modes in ZnO single nanocombs |
| title_sort |
nonlinear excitation of polariton cavity modes in zno single nanocombs |
| url |
http://hdl.handle.net/20.500.12110/paper_10944087_v22_n5_p5341_Capeluto |
| work_keys_str_mv |
AT capelutomg nonlinearexcitationofpolaritoncavitymodesinznosinglenanocombs AT grinblatg nonlinearexcitationofpolaritoncavitymodesinznosinglenanocombs AT tiradom nonlinearexcitationofpolaritoncavitymodesinznosinglenanocombs AT comedid nonlinearexcitationofpolaritoncavitymodesinznosinglenanocombs AT bragasav nonlinearexcitationofpolaritoncavitymodesinznosinglenanocombs |
| _version_ |
1807321175260397568 |