Sound velocity and index of refraction of AlAs measured by picosecond ultrasonics

Sound velocity and index of refraction of AlAs measured by picosecond ultrasonics

We use picosecond optics techniques to generate and detect acoustic pulses in an epitaxially grown film of AlAs. From the round trip time of the acoustic pulse we find a sound velocity in the [100] direction of 6.4×105 cm s−1. We also show how measurements of this type can be used to determine the r...

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Veröffentlicht in:Appl. Phys. Lett.; (United States) 1988-11, Vol.53 (21), p.2023-2024
Hauptverfasser: GRAHN, H. T, YOUNG, D. A, MARIS, H. J, TAUC, J, HONG, J. M, SMITH, T. P. III
Format: Artikel
Sprache:eng
Schlagworte:
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
MATERIALS SCIENCE
MEASURING METHODS
OPTICAL PROPERTIES
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
PHYSICAL PROPERTIES
Physics
PNICTIDES 360603 > Materials-- Properties
REFRACTIVITY
SOUND WAVES
THIN FILMS
ULTRASONIC WAVES
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Beschreibung
Zusammenfassung:We use picosecond optics techniques to generate and detect acoustic pulses in an epitaxially grown film of AlAs. From the round trip time of the acoustic pulse we find a sound velocity in the [100] direction of 6.4×105 cm s−1. We also show how measurements of this type can be used to determine the refractive index.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.100309