skip to main content

Title: Spin-lasers: From threshold reduction to large-signal analysis

Lasers in which spin-polarized carriers are injected provide paths to different practical room temperature spintronic devices, not limited to magnetoresistive effects. Unlike the conventional understanding of spintronic devices, an optimal performance of such spin-lasers can arise for finite, not infinite, spin relaxation time. By considering spin-relaxation times of both electrons and holes, we elucidate advantages of spin-lasers over their conventional (spin-unpolarized) counterparts. In addition to the steady-state threshold reduction, spin-lasers can improve transient operation leading to shorter turn-on delay times, reduced ringing of emitted light, and an enhanced bandwidth.
Authors:
; ; ;  [1]
  1. Department of Physics, University at Buffalo, State University of New York, Buffalo, New York 14260 (United States)
Publication Date:
OSTI Identifier:
22311209
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARRIERS; ELECTRONS; EMISSION; EQUIPMENT; LASERS; MAGNETORESISTANCE; REDUCTION; RELAXATION TIME; SPIN; SPIN ORIENTATION; STEADY-STATE CONDITIONS; TEMPERATURE RANGE 0273-0400 K; TRANSIENTS; VISIBLE RADIATION