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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 17, Iss. 4 — Feb. 15, 1978
  • pp: 520–525

Nonlinear reflection properties of germanium associated with thermal effects

R. M. Herman, C. L. Chin, and E. Young  »View Author Affiliations


Applied Optics, Vol. 17, Issue 4, pp. 520-525 (1978)
http://dx.doi.org/10.1364/AO.17.000520


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Abstract

Thermal excitations on a germanium surface under simultaneous irradiation by two monochromatic optical beams, one strong and one weak, are predicted as functions of the angular separation and frequency difference between the beams, their relative polarization, their intensities, and pulse durations. Nonlinear optical reflection for Q-switched ruby laser pulses is then described. Weak reflected and diffracted beam intensities show tendencies in which the former is preferentially enhanced for a downshifted weak beam frequency, while the latter depends only on the shift magnitude. Both are suppressed for large shifts or large angular separations between input beams.

© 1978 Optical Society of America

History
Original Manuscript: June 27, 1977
Published: February 15, 1978

Citation
R. M. Herman, C. L. Chin, and E. Young, "Nonlinear reflection properties of germanium associated with thermal effects," Appl. Opt. 17, 520-525 (1978)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-17-4-520


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References

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  11. Auston and Shank4 have found the solution for a similar transport equation at z = 0, in which their source term is spatially distributed and instantaneous in time, in contrast to the source term in the present treatment, which is localized in space and distributed in time. The solutions are compatible in the limits of localization both in space and time.

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