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Reflection of a Plane Wave at the Boundary of a Saturable Absorber: Normal Incidence

L. Roso, M. Ll. Pons

The absorption and reflection of a plane wave at the interface of a linear dielectric and a very dense saturable absorber is studied in situations where the linear refractive index has an imaginary part that is much bigger than its real part. In this domain of parameters, computed results calculated without the use of the slowly varying envelope approximation show the presence of a self-reflected wave that eventually might lead to a bistable reflectivity.

Journal of Modern OpticsOct 1, 19908 citations

Bistability at an electro-optic interface

P. W. E. Smith, A. E. Kaplan, W. J. Tomlinson +1 more

We report the first known demonstration of a novel bistable optical device that switches an interface between reflecting and transmitting states. Our results are in agreement with a simple graphical analysis.

Optics LettersFeb 1, 198218 citations

Self-Reflected Wave inside a Very Dense Saturable Absorber

L. Roso

The numerical solution of the Maxwell-Bloch equations describing the propagation of a plane monochromatic wave through a saturable absorber shows the appearance of a new kind of reflected wave generated inside the medium. This new phenomenon is described and its physical origin, related to the saturation-induced refractive index changes, is discussed.

Physical Review LettersNov 11, 198535 citations

Intensity-dependent spectral reflectivity of a dense-gas–dielectric interface

Richard M. Friedberg, Sven R. Hartmann, Jamal T. Manassah

Intense light incident on a dense-gas--dielectric interface, from the dielectric side, is reflected because of the combined effect of the discontinuities in the index of refraction at the interface and at the transition region in the gas where the degree of atomic saturation changes abruptly. This latter discontinuity gives rise to a self-reflected wave. At low intensities this self-reflected wave is weak, the problem is linear, and the net reflected wave intensity taken as a function of frequency has a simple shape that should allow measurement of the hitherto undetected self-induced frequency shift in a collision-broadened gas at an absorption resonance. Calculations show that in the weak intensity regime, r'', the imaginary part of the reflection coefficient, is quasi-Lorentzian and shifted by an amount comparable to its width. At high light intensity r'' broadens, shifts, and distorts. The distortion, which nonuniformly modulates the Lorentzian shape, comes from an interference of the forward and self-reflected waves. In the wings of the resonance line the self-reflected wave can be neglected, and the shape of r'' although not distorted is shifted from where it would be if there were no local field correction.Intense light incident on a dense-gas--dielectric interface, from the dielectric side, is reflected because of the combined effect of the discontinuities in the index of refraction at the interface and at the transition region in the gas where the degree of atomic saturation changes abruptly. This latter discontinuity gives rise to a self-reflected wave. At low intensities this self-reflected wave is weak, the problem is linear, and the net reflected wave intensity taken as a function of frequency has a simple shape that should allow measurement of the hitherto undetected self-induced frequency shift in a collision-broadened gas at an absorption resonance. Calculations show that in the weak intensity regime, r'', the imaginary part of the reflection coefficient, is quasi-Lorentzian and shifted by an amount comparable to its width. At high light intensity r'' broadens, shifts, and distorts. The distortion, which nonuniformly modulates the Lorentzian shape, comes from an interference of the forward and self-reflected waves. In the wings of the resonance line the self-reflected wave can be neglected, and the shape of r'' although not distorted is shifted from where it would be if there were no local field correction.

Physical Review ANov 1, 199030 citations

Theory of optical switching and bistability at a nonlinear (liquid-crystal-dielectric) interface (A)

I. C. Khoo, Richard J. F. Normandin, Vincent So

Journal of the Optical Society of America AJan 1, 19821 citation

Theoretical treatment of phase conjugation during four-wave mixingg in saturable dyes in terms of a Fourier expansion

Lutz Wenke, Armin Kießling, B. Fleck

Optics and SpectroscopyMar 1, 19920 citations

Self-induced reflection at a saturable interface

Abstract

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Self-induced reflection at a saturable interface

Abstract

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