skip to main content

Title: Quantum cascade emission in the III-nitride material system designed with effective interface grading

We report the realization of quantum cascade (QC) light emission in the III-nitride material system, designed with effective interface grading (EIG). EIG induces a continuous transition between wells and barriers in the quantum confinement, which alters the eigenstate system and even delocalizes the states with higher energy. Fully transverse-magnetic spontaneous emission is observed from the fabricated III-nitride QC structure, with a center wavelength of ∼4.9 μm and a full width at half maximum of ∼110 meV, both in excellent agreement with theoretical predictions. A multi-peak photo-response spectrum is also measured from the QC structure, which again agrees well with theoretical calculations and verifies the effects of EIG.
Authors:
; ; ;  [1] ; ;  [2] ;  [3]
  1. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08540 (United States)
  2. Corning Incorporated, Corning, New York 14831 (United States)
  3. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
Publication Date:
OSTI Identifier:
22482168
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONFINEMENT; DESIGN; DIFFUSION BARRIERS; EMISSION; INTERFACES; MILLI EV RANGE; SPECTRA; VENTILATION BARRIERS; VISIBLE RADIATION; WAVELENGTHS; WIDTH