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/cm 2 at room temperature.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
