Semiconductor microwave mirror for a measurement of the dynamical Casimir effect
- 1 November 2004
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 75 (11) , 4967-4970
- https://doi.org/10.1063/1.1808892
Abstract
According to QED a metallic mirror set in motion in quantum vacuum gives rise to “dissipated” energy in the form of real photons. This phenomenon, called dynamical Casimir effect, has never been observed due to unsolved technical difficulties: in order to obtain an experimentally measurable number of photons from vacuum fluctuations a reflecting surface has in fact to vibrate at very high frequencies (≃109 Hz). As these frequencies are too high to be achieved with a purely mechanical oscillation, our idea is to switch an effective microwave mirror on and off at very short intervals of time changing the reflectivity of a semiconductor layer by shining a pulsed laser beam on its surface. The first step to study the feasibility of this technique is to show that a semiconductor slab when illuminated by a laser behaves indeed as a metal. This article presents the measurements that confirm this demand, obtained by uniformly illuminating large (several square centimeters) surfaces of silicon and GaAs.Keywords
This publication has 9 references indexed in Scilit:
- Dynamical Casimir effect in a leaky cavity at finite temperaturePhysical Review A, 2002
- Modeling and measuring the reflection and transmission of a silicon wafer in the X‐ and Ka‐bands under illumination of light in a closed waveguide structureMicrowave and Optical Technology Letters, 2001
- The “friction” of vacuum, and other fluctuation-induced forcesReviews of Modern Physics, 1999
- Femtosecond near-field optical spectroscopy of implantation patterned semiconductorsApplied Physics Letters, 1999
- Motion Induced Radiation from a Vibrating CavityPhysical Review Letters, 1996
- Generation and detection of photons in a cavity with a resonantly oscillating boundaryPhysical Review A, 1996
- Resonance Response of the Quantum Vacuum to an Oscillating BoundaryPhysical Review Letters, 1994
- Optical Absorption of Gallium Arsenide between 0.6 and 2.75 eVPhysical Review B, 1962
- Infrared Absorption of Silicon Near the Lattice EdgePhysical Review B, 1955