Download e-book for iPad: Nonlinear Optics in Semiconductors I by Robert K. Willardson, Eicke R. Weber, Elsa Garmire, Alan

By Robert K. Willardson, Eicke R. Weber, Elsa Garmire, Alan Kost

ISBN-10: 0127521674

ISBN-13: 9780127521671

For the reason that its inception in 1966, the sequence of numbered volumes referred to as Semiconductors and Semimetals has special itself in the course of the cautious choice of famous authors, editors, and participants. The "Willardson and Beer" sequence, because it is well known, has succeeded in publishing quite a few landmark volumes and chapters. not just did a lot of those volumes make an effect on the time in their ebook, yet they remain well-cited years after their unique unencumber. lately, Professor Eicke R. Weber of the collage of California at Berkeley joined as a co-editor of the sequence. Professor Weber, a widely known specialist within the box of semiconductor fabrics, will additional give a contribution to carrying on with the sequence' culture of publishing well timed, hugely correct, and long-impacting volumes. a few of the fresh volumes, similar to Hydrogen in Semiconductors, Imperfections in III/V fabrics, Epitaxial Microstructures, High-Speed Heterostructure units, Oxygen in Silicon, and others promise that this custom might be maintained or even elevated. Reflecting the actually interdisciplinary nature of the sphere that the sequence covers, the volumes in Semiconductors and Semimetals were and may remain of serious curiosity to physicists, chemists, fabrics scientists, and machine engineers in sleek undefined.

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Using semiconductor quantum wells is an advantage for applications that require moderate changes in absorption or refractive index with low-level excitation or require the largest possible changes with high excitation. 2. INTERSUBBAND ABSORPTIONSATURATION Transitions between quantum well subbands give strong absorption in the infrared (Fig. 17). Intersubband absorption in quantum wells was first reported by West and Eglash, who predicted large optical nonlinearity with resonant excitation (West and Eglash, 1985).

16(b) shows the slope and intercept of a linear fit to l/[a(l) - @ linear fit for the data at the n = 1 heavy-hole excitonic resonance for the M Q W with 50-A wells. This procedure gave the solid lines in Fig. 15. d. Measurement Summary Table I1 summarizes the nonlinear absorption for all five samples. Values are given for both light- and heavy-hole excitons for the samples with 50-A and 75-8, quantum wells, where the light-hole exciton could be measured separately from the heavy-hole exciton. 0 W T E m (WICmt) FIG.

In this case, it is more difficult, to relate absorption to transmission. The material becomes a Fabry-Perot cavity filled with a nonlinear medium -a nonlinear FabryPerot (Fig. 5). If the absorption coefficient is approximately constant along 1 RESONANT OPTICAL NONLINEARITIES IN SEMICONDUCTORS 15 FIG. 5. A nonlinear Fabry-Perot. the length of the Fabry-Perot, the transmission is T= ( 1 - RjX1 - Rb)e-"L 1 ( 1 - Re,,)' 1 + Fsin'6 (38) and the reflectance is where R e f f= e-"L(RjRb)"' is the effective mean reflectance, F = 4 R e f f / (1 -Reff)' is called the coeBcient ofJnesse, and 6 is a wavelength-dependent phase, proportional to the optical path length in the Fabry-Perot, that is, where L,,, is the length of the cavity, and ncavis the average refractive index.

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Nonlinear Optics in Semiconductors I by Robert K. Willardson, Eicke R. Weber, Elsa Garmire, Alan Kost

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