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Title: Plasmonic modification of electron-longitudinal-optical phonon coupling in Ag-nanoparticle embedded InGaN/GaN quantum wells

Abstract

Surface plasmon enhanced GaN and InGaN quantum wells (QWs) show promise for use as room-temperature light emitters. The effectiveness of the plasmon enhancement, however, is limited by the strong electron/hole and longitudinal optical phonon coupling found in the III-V nitrides. The electron-phonon coupling within semiconductor QWs has been modified using silver nanoparticles embedded within the QWs. Direct evidence is provided for this change via confocal Raman spectroscopy of the samples. This evidence is augmented by Angle-dependent photoluminescence experiments which show the alteration of the electron-phonon coupling strength through measurement of the emitted phonon replicas. Together these demonstrate a direct modification of carrier-phonon interactions within the system, opening up the possibility of controlling the coupling strength to produce high-efficiency room-temperature light emitters.

Authors:
;  [1];  [2];  [3]
  1. Department of Physics, University of North Texas, Denton, Texas 76203 (United States)
  2. Department of Physics, CICECO, Universidade de Aveiro, 3810-193 Aveiro (Portugal)
  3. Institute of Photonics, University of Strathclyde, Wolfson Centre, 106 Rottenrow East, Glasgow G4 0NW (United Kingdom)
Publication Date:
OSTI Identifier:
22311005
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; EFFICIENCY; ELECTRON-PHONON COUPLING; GALLIUM NITRIDES; INDIUM COMPOUNDS; INTERACTIONS; MODIFICATIONS; NANOPARTICLES; PHONONS; PHOTOLUMINESCENCE; QUANTUM WELLS; RAMAN SPECTROSCOPY; SEMICONDUCTOR MATERIALS; SILVER; SURFACES; TEMPERATURE RANGE 0273-0400 K; VISIBLE RADIATION

Citation Formats

Llopis, Antonio, Neogi, Arup, Pereira, Sérgio M. S., and Watson, Ian M. Plasmonic modification of electron-longitudinal-optical phonon coupling in Ag-nanoparticle embedded InGaN/GaN quantum wells. United States: N. p., 2014. Web. doi:10.1063/1.4894371.
Llopis, Antonio, Neogi, Arup, Pereira, Sérgio M. S., & Watson, Ian M. Plasmonic modification of electron-longitudinal-optical phonon coupling in Ag-nanoparticle embedded InGaN/GaN quantum wells. United States. doi:10.1063/1.4894371.
Llopis, Antonio, Neogi, Arup, Pereira, Sérgio M. S., and Watson, Ian M. Mon . "Plasmonic modification of electron-longitudinal-optical phonon coupling in Ag-nanoparticle embedded InGaN/GaN quantum wells". United States. doi:10.1063/1.4894371.
@article{osti_22311005,
title = {Plasmonic modification of electron-longitudinal-optical phonon coupling in Ag-nanoparticle embedded InGaN/GaN quantum wells},
author = {Llopis, Antonio and Neogi, Arup and Pereira, Sérgio M. S. and Watson, Ian M.},
abstractNote = {Surface plasmon enhanced GaN and InGaN quantum wells (QWs) show promise for use as room-temperature light emitters. The effectiveness of the plasmon enhancement, however, is limited by the strong electron/hole and longitudinal optical phonon coupling found in the III-V nitrides. The electron-phonon coupling within semiconductor QWs has been modified using silver nanoparticles embedded within the QWs. Direct evidence is provided for this change via confocal Raman spectroscopy of the samples. This evidence is augmented by Angle-dependent photoluminescence experiments which show the alteration of the electron-phonon coupling strength through measurement of the emitted phonon replicas. Together these demonstrate a direct modification of carrier-phonon interactions within the system, opening up the possibility of controlling the coupling strength to produce high-efficiency room-temperature light emitters.},
doi = {10.1063/1.4894371},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 9,
volume = 105,
place = {United States},
year = {2014},
month = {9}
}