TY - JOUR

T1 - Anisotropic Radiation in Heterostructured “Emitter in a Cavity” Nanowire

AU - Kuznetsov, Alexey

AU - Roy, Prithu

AU - Kondratev, Valeriy M.

AU - Fedorov, Vladimir V.

AU - Kotlyar, Konstantin P.

AU - Reznik, Rodion R.

AU - Vorobyev, Alexander A.

AU - Mukhin, Ivan S.

AU - Cirlin, George E.

AU - Bolshakov, Alexey D.

N1 - Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/1/13

Y1 - 2022/1/13

N2 - 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.

AB - 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.

KW - Cavity

KW - Emitter

KW - GaP

KW - GaPAs

KW - Infrared

KW - Nanodisc

KW - Nanowire

KW - Photonics

KW - Waveguide

UR - http://www.scopus.com/inward/record.url?scp=85122659349&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/43958e04-708f-3a29-b7bf-1c6bbcf61f80/

U2 - 10.3390/nano12020241

DO - 10.3390/nano12020241

M3 - Article

AN - SCOPUS:85122659349

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 2

M1 - 241

ER -