Optical generator and detector of stress pulses

Details Optical generator and detector of stress pulses Optical generator and detector of stress pulses

1985-05-17

1987-12-01

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

73643, 374 57, 356445, G01N 2100

Patent

active

047100303

ABSTRACT:
An optical stress pulse generation and detection system for non-destructively measuring physical properties of a sample, which uses a pump beam having short duration radiation pulses having an intensity and at least one wavelength selected to non-destructively generate a stress pulse in a sample and directs the non-destructive pump beam to a surface of the sample to generate the stress pulse. The optical stress pulse generation and detection system also uses a probe radiation beam and guides the probe beam to a location at the sample to intercept the stress pulse. The change in optical constants induced by the stress pulse is detected by observing the probe beam after it intercepts the stress pulse.

REFERENCES:
patent: 4484820 (1984-11-01), Rosencwaig
patent: 4579463 (1986-04-01), Rosencwaig et al.
Auston et al., "Picosecond Ellipsometry of Transient Electron-Hole Plasmas in Germanium", Physical Review Letters, vol. 32, No. 20, (May 20, 1974), pp. 1120-1123.
Liu et al., "Picosecond Time-Resolved Plasma and Temperature-Induced Changes of Reflectivities and Transmission in Silicon", Appl. Phys. Lett., vol. 41, No. 7, (Oct. 1, 1982), pp. 643-646.
Shay, "Photoreflectance Line Shape at the Fundamental Edge in Ultrapure GaAs", Physical Review B, vol. 2, No. 4, (Aug. 15, 1970), pp. 803-807.
Nilsson, "Reflectance Modulation in Ge and GeAs by Optical Carrier Injection", Solid State Communications, vol. 7, No. 5, (1969), pp. 479-481.
Thomsen et al., "Coherent Phonon Generation and Detection by Picosecond Light Pulses", Physical Review Letter, vol. 53, No. 10, (Sep. 3, 1984), pp. 989-992.
Thomsen et al., "Picosecond Optical Generation and Detection of Phonon Waves in a-As.sub.2 Te.sub.3 ", AIP Conference Proceedings No. 120, Optical Effects in Amorphous Semiconductors, pp. 102-109, (1984).
Thomsen et al., "Picosecond Optical Excitation of Phonons in Amorphous As.sub.2 Te.sub.3 " Ultrafast Phenomena IV, ed. Austron et al., Springer Verlag, New York, 1984, pp. 133-136.
Downer et al., "Imaging with Feutosecond Optical Pulses", Ultrafast Phenomena IV, Springer Verlag, New York, 1984, pp. 106-110.
Rosencwaig et al., "Detection of Thermal Waves through Optical Reflectance", Applied Physics Letters, 46(11), Jun. 1, 1985, pp. 1013-1015.

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