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Title: Spin noise amplification and giant noise in optical microcavity

When studying the spin-noise-induced fluctuations of Kerr rotation in a quantum-well microcavity, we have found a dramatic increase of the noise signal (by more than two orders of magnitude) in the vicinity of anti-crossing of the polariton branches. The effect is explained by nonlinear optical instability of the microcavity giving rise to the light-power-controlled amplification of the polarization noise signal. In the framework of the developed model of built-in amplifier, we also interpret the nontrivial spectral and intensity-related properties of the observed noise signal below the region of anti-crossing of polariton branches. The discovered effect of optically controllable amplification of broadband polarization signals in microcavities in the regime of optical instability may be of interest for detecting weak oscillations of optical anisotropy in fundamental research and for other applications in optical information processing.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [2]
  1. Spin-Optics Laboratory, St. Petersburg State University, 198504 St. Petersburg (Russian Federation)
  2. Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom)
  3. (Russian Federation)
Publication Date:
OSTI Identifier:
22412925
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 22; 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; AMPLIFICATION; ANISOTROPY; FLUCTUATIONS; KERR EFFECT; NOISE; NONLINEAR PROBLEMS; OPTICS; OSCILLATIONS; POLARIZATION; POLARONS; QUANTUM WELLS; SPIN; VISIBLE RADIATION