Optically produced local space charge field in a quantum heterostructure; towards an all-optical thin film photorefractive device

N. T. Pelekanos, B. Deveaud, P. Gravey, J. M. Gérard, J. Hebling, J. Kuhl

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We propose a novel quantum heterostructure especially designed to be used as a thin film photorefractive device without the need of electrical contacts. In the bright fringes of an incident interference pattern, a substantial space charge field perpendicular to the quantum well plane is established in every period of the heterostructure, due to efficient photocarrier separation occuring in GaAs/AlAs quantum filters. This optically produced electric field influences the optical constants in the wavelength region of a quantum well exciton resonance via the Quantum Confined Stark Effect, thus creating an index and absorption grating. We present results which show clear evidence of a photoinduced electric field of about 30 kV/cm with optical excitation of approximately 50 W/cm2 at room temperature.

Original languageEnglish
Pages (from-to)358-361
Number of pages4
JournalOptical Materials
Volume4
Issue number2-3
DOIs
Publication statusPublished - 1995

Fingerprint

Optical films
Electric space charge
Semiconductor quantum wells
Heterojunctions
space charge
Electric fields
quantum wells
Stark effect
Thin films
Optical constants
electric fields
Photoexcitation
thin films
Excitons
electric contacts
excitons
gratings
interference
filters
Wavelength

ASJC Scopus subject areas

  • Computer Science(all)
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Optically produced local space charge field in a quantum heterostructure; towards an all-optical thin film photorefractive device. / Pelekanos, N. T.; Deveaud, B.; Gravey, P.; Gérard, J. M.; Hebling, J.; Kuhl, J.

In: Optical Materials, Vol. 4, No. 2-3, 1995, p. 358-361.

Research output: Contribution to journalArticle

Pelekanos, N. T. ; Deveaud, B. ; Gravey, P. ; Gérard, J. M. ; Hebling, J. ; Kuhl, J. / Optically produced local space charge field in a quantum heterostructure; towards an all-optical thin film photorefractive device. In: Optical Materials. 1995 ; Vol. 4, No. 2-3. pp. 358-361.
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