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Title: Differential ultrafast all-optical switching of the resonances of a micropillar cavity

We perform frequency- and time-resolved all-optical switching of a GaAs-AlAs micropillar cavity using an ultrafast pump-probe setup. The switching is achieved by two-photon excitation of free carriers. We track the cavity resonances in time with a high frequency resolution. The pillar modes exhibit simultaneous frequency shifts, albeit with markedly different maximum switching amplitudes and relaxation dynamics. These differences stem from the non-uniformity of the free carrier density in the micropillar, and are well understood by taking into account the spatial distribution of injected free carriers, their spatial diffusion and surface recombination at micropillar sidewalls.
Authors:
; ; ;  [1] ; ;  [2] ;  [3]
  1. Complex Photonic Systems (COPS), MESA Institute for Nanotechnology, University of Twente, 7500 AE Enschede (Netherlands)
  2. University Grenoble Alpes, INAC-SP2M, Nanophysics and Semiconductors Lab, F-38000 Grenoble (France)
  3. (France)
Publication Date:
OSTI Identifier:
22303492
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 11; 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; ALUMINIUM ARSENIDES; AMPLITUDES; CARRIER DENSITY; CARRIERS; CAVITY RESONATORS; DIFFUSION; EXCITATION; GALLIUM ARSENIDES; PHOTONS; RECOMBINATION; RELAXATION; RESONANCE; SPATIAL DISTRIBUTION; SURFACES; TIME RESOLUTION