Anisotropic Radiation in Heterostructured "Emitter in a Cavity" Nanowire.
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| Title: | Anisotropic Radiation in Heterostructured "Emitter in a Cavity" Nanowire. |
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| Authors: | Kuznetsov, Alexey1 (AUTHOR) alkuznetsov1998@gmail.com, Roy, Prithu2 (AUTHOR) prithu.roy@fresnel.fr, Kondratev, Valeriy M.1 (AUTHOR) kvm_96@mail.ru, Fedorov, Vladimir V.1,3 (AUTHOR) burunduk.uk@gmail.com, Kotlyar, Konstantin P.1,4 (AUTHOR) konstantin21kt@gmail.com, Reznik, Rodion R.1 (AUTHOR) moment92@mail.ru, Vorobyev, Alexander A.1 (AUTHOR) alex.spbau@mail.ru, Mukhin, Ivan S.1,2,3 (AUTHOR) imukhin@yandex.ru, Cirlin, George E.1 (AUTHOR) george.cirlin@mail.ru, Bolshakov, Alexey D.1,5 (AUTHOR) bolshakov@live.com |
| Source: | Nanomaterials (2079-4991). Jan2022, Vol. 12 Issue 2, p241-241. 1p. |
| Subjects: | Semiconductor nanowires, Nanowires, Fabry-Perot resonators, Radiation, Refractive index, Numerical calculations, Photoluminescence |
| Abstract: | Tailorable synthesis of axially heterostructured epitaxial nanowires (NWs) with a proper choice of materials allows for the fabrication of novel photonic devices, such as a nanoemitter in the resonant cavity. An example of the structure is a GaP nanowire with ternary GaPAs insertions in the form of nano-sized discs studied in this work. With the use of the micro-photoluminescence technique and numerical calculations, we experimentally and theoretically study photoluminescence emission in individual heterostructured NWs. Due to the high refractive index and near-zero absorption through the emission band, the photoluminescence signal tends to couple into the nanowire cavity acting as a Fabry–Perot resonator, while weak radiation propagating perpendicular to the nanowire axis is registered in the vicinity of each nano-sized disc. Thus, within the heterostructured nanowire, both amplitude and spectrally anisotropic photoluminescent signals can be achieved. Numerical modeling of the nanowire with insertions emitting in infrared demonstrates a decay in the emission directivity and simultaneous rise of the emitters coupling with an increase in the wavelength. The emergence of modulated and non-modulated radiation is discussed, and possible nanophotonic applications are considered. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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