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May 1994

Volume 47, Issue 5

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Special Issue: Nonlinear Optics

Elsa Garmire
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Nonlinear Optical Frequency Conversion

Martin M. Fejer
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Mixing laser beams of different frequencies in a crystal with nonlinear polarizability can generate coherent output at sum and difference frequencies for which there are no convenient laser sources.

Ultrafast Switching with Nonlinear Optics

Mohammed N. Islam
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Electronic switching is a bottleneck that could limit single‐channel network speeds to about 5 gigabits per second. All‐optical switching and logic gates could repeal this speed limit on the information superhighway.

Nonlinear Optics in Semiconductors

Elsa Garmire
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Optical signal processing in the future may use semiconductors in which the optical generation of electrons and holes controls the absorption and refractive index.

Nonlinear Optics of Organic and Polymer Materials

Anthony Garito, Rui Fang Shi, and Marvin Wu
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Exotic multiexciton strings, electron correlation effects and custom‐designed nonlinear optical molecules are some of the developments resulting from initial efforts toward active control of light‐matter interactions in nonlinear organic systems. The potential applications are equally diverse and exciting.
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Women in Physics Face Patterns of Inequity

Kenneth Lyons and Louise Perkins
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Scientists Should Heed George Brown's Thesis

Harold P. Hanson
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Physicists’ Long Hours Limit Job Numbers

Fred Unterleitner
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Nuclear Expertise Must Survive Disarmament

Joseph J. Devaney
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Mercury's Perihelion Precession, Precisely

Roy D. North
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How Santa Cruz Faculty Built itself up

Michael Nauenberg
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Teach Nonscience Majors ‘Real World’ Physics

David G. Stork and F. Curtis Michel
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Near‐Field Optical Microscopes Take a Close Look at Individual Molecules

Graham P. Collins
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Reaching for the Top

Ray Ladbury
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Teaching Science by Seminar

George Greenstein
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And Yet it Moves: Strange Systems and Subtle Questions in Physics

Mark P. Silverman and Sidney Perkowitz, Reviewer
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Introduction to Nuclear and Particle Physics

Ashok Das, Thomas Ferbel, and Charles Glashausser, Reviewer
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Bénard Cells and Taylor Vortices

E. L. Koschmieder and C. David Andereck, Reviewer
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New Books

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New Products

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APS Bestows Honors at April Meeting

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National Academy of Engineering Names New Members

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In Brief

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FREE

Pei‐Yuan Chou

C. C. Lin
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Monica Healea

Doane Douthett
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Alexander A. Pomansky

Victor A. Matveev and Frank T. Avignone, III
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Michael Francis Gormley

John Peoples, Jr. and Stephen C. O'day
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Laird D. Schearer

Timothy J. Gay, G. King Walters, and Frank Laloe
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Rolf G. Winter

Roy L. Champion, Morton Eckhause, John R. Kane, Hans Christian Von Baeyer, and Robert E. Welsh
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Unfairness Charges in Big Awards Prompt Academies to Chastise NSF

Irwin Goodwin
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Fellows Bring Enthusiasm and Varied Backgrounds to Government

Denis F. Cioffi and Jean Kumagai
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AAS Elects New Vice President

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Physics Today Gets a Publisher

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Calendar

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