Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots
Control of directionality of emissions is an important task for the realization of novel nanophotonic devices based on nanowires. Most of the existing approaches providing high directionality of the light emitted from nanowires are based on the utilization of the tapered shape of nanowires, serving...
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MDPI AG
2021-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/11/2894 |
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| author | Rodion R. Reznik George E. Cirlin Konstantin P. Kotlyar Igor V. Ilkiv Nika Akopian Lorenzo Leandro Valentin V. Nikolaev Alexey V. Belonovski Mikhail A. Kaliteevski |
| author_facet | Rodion R. Reznik George E. Cirlin Konstantin P. Kotlyar Igor V. Ilkiv Nika Akopian Lorenzo Leandro Valentin V. Nikolaev Alexey V. Belonovski Mikhail A. Kaliteevski |
| author_sort | Rodion R. Reznik |
| collection | DOAJ |
| description | Control of directionality of emissions is an important task for the realization of novel nanophotonic devices based on nanowires. Most of the existing approaches providing high directionality of the light emitted from nanowires are based on the utilization of the tapered shape of nanowires, serving as nanoantenna coupling with the light waveguided in nanowire and the directional output beam. Here we report the beaming of the emitted light with wavelength near 800 nm by naturally formed core-shell AlGaAs NW with multiply GaAs quantum dots (QDs) diameter 30 nm and height 10 nm, while the diameter of NW 130 nm, what does not support efficient emission into waveguided modes, including the mode HE<sub>11</sub>. Experimental measurements show that intensity of emission for directions in the vicinity of the axis of NW is about two orders of magnitude higher than for perpendicular directions. The developed theoretical approach allowed us to calculate the probability of spontaneous emission for various directions and into waveguided modes and showed that highly directional radiation can be provided by the intrinsic emission properties of cylindrical NW. Our results suggest that for the small diameter of NW, directional emissions are associated with an TM<sub>0</sub> leaky mode (when electric field oriented in axial direction) and therefore manifests in an existence of axial electric dipole transitions in quantum dots. |
| first_indexed | 2024-03-10T05:13:05Z |
| format | Article |
| id | doaj.art-9a4b15c95697484f95a21ce139d24230 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T05:13:05Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-9a4b15c95697484f95a21ce139d242302023-11-23T00:40:01ZengMDPI AGNanomaterials2079-49912021-10-011111289410.3390/nano11112894Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum DotsRodion R. Reznik0George E. Cirlin1Konstantin P. Kotlyar2Igor V. Ilkiv3Nika Akopian4Lorenzo Leandro5Valentin V. Nikolaev6Alexey V. Belonovski7Mikhail A. Kaliteevski8Alferov University, Khlopina St. 8/3, 194021 St. Petersburg, RussiaAlferov University, Khlopina St. 8/3, 194021 St. Petersburg, RussiaAlferov University, Khlopina St. 8/3, 194021 St. Petersburg, RussiaSt. Petersburg State University, 13B Universitetskaya Emb, 198504 St. Petersburg, RussiaDepartment of Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkDepartment of Photonics Engineering, Technical University of Denmark, 2800 Kongens Lyngby, DenmarkIoffe Institute, Polytechnicheskaya St. 26, 194021 St. Petersburg, RussiaAlferov University, Khlopina St. 8/3, 194021 St. Petersburg, RussiaAlferov University, Khlopina St. 8/3, 194021 St. Petersburg, RussiaControl of directionality of emissions is an important task for the realization of novel nanophotonic devices based on nanowires. Most of the existing approaches providing high directionality of the light emitted from nanowires are based on the utilization of the tapered shape of nanowires, serving as nanoantenna coupling with the light waveguided in nanowire and the directional output beam. Here we report the beaming of the emitted light with wavelength near 800 nm by naturally formed core-shell AlGaAs NW with multiply GaAs quantum dots (QDs) diameter 30 nm and height 10 nm, while the diameter of NW 130 nm, what does not support efficient emission into waveguided modes, including the mode HE<sub>11</sub>. Experimental measurements show that intensity of emission for directions in the vicinity of the axis of NW is about two orders of magnitude higher than for perpendicular directions. The developed theoretical approach allowed us to calculate the probability of spontaneous emission for various directions and into waveguided modes and showed that highly directional radiation can be provided by the intrinsic emission properties of cylindrical NW. Our results suggest that for the small diameter of NW, directional emissions are associated with an TM<sub>0</sub> leaky mode (when electric field oriented in axial direction) and therefore manifests in an existence of axial electric dipole transitions in quantum dots.https://www.mdpi.com/2079-4991/11/11/2894nanowirequantum dotdirectionality of emissionPurcell factorwaveguide modesmolecular beam epitaxy |
| spellingShingle | Rodion R. Reznik George E. Cirlin Konstantin P. Kotlyar Igor V. Ilkiv Nika Akopian Lorenzo Leandro Valentin V. Nikolaev Alexey V. Belonovski Mikhail A. Kaliteevski Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots Nanomaterials nanowire quantum dot directionality of emission Purcell factor waveguide modes molecular beam epitaxy |
| title | Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots |
| title_full | Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots |
| title_fullStr | Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots |
| title_full_unstemmed | Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots |
| title_short | Purcell Effect and Beaming of Emission in Hybrid AlGaAs Nanowires with GaAs Quantum Dots |
| title_sort | purcell effect and beaming of emission in hybrid algaas nanowires with gaas quantum dots |
| topic | nanowire quantum dot directionality of emission Purcell factor waveguide modes molecular beam epitaxy |
| url | https://www.mdpi.com/2079-4991/11/11/2894 |
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