Coherent control of optically generated and detected picosecond surface acoustic phonons
Coherent control of electronic and phononic excitations in solids, as well as chemical and biological systems on ultrafast time scales is of current research interest. In semiconductors, coherent control of phonons has been demonstrated for acoustic and optical phonons generated in superlattice structures. The bandwidth of these approaches is typically fully utilized by employing a 1-D geometry where the laser spot size is much larger than the superlattice repeat length. In this article we demonstrate coherent control of optically generated picosecond surface acoustic phonons using sub-optical wavelength absorption gratings. The generation and detection characteristics of two material systems are investigated (aluminum absorption gratings on Si and GaAs substrates). Constructive and complete destructive interference conditions are demonstrated using two pump pulses derived from a single Michelson interferometer.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- DE-AC07-99ID-13727
- OSTI ID:
- 917072
- Report Number(s):
- INL/JOU-06-11928; KPSJAS; TRN: US0804425
- Journal Information:
- Journal of the Korean Physical Society, Vol. 51, Issue 1; ISSN 0374-4884
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 - CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 - CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ACOUSTICS
ALUMINIUM
DETECTION
GEOMETRY
LASERS
MICHELSON INTERFEROMETER
PHONONS
SUBSTRATES
SUPERLATTICES
WAVELENGTHS
acoustic phonon
coherent control
picosecond acoustics