Time-delayed second-harmonic generation in an atomic vapor of cesium

A. I. Lvovsky; Sven R. Hartmann

doi:10.1117/12.328222

21 October 1998 Time-delayed second-harmonic generation in an atomic vapor of cesium

A. I. Lvovsky, Sven R. Hartmann

Proceedings Volume 3485, 11th International Vavilov Conference on Nonlinear Optics; (1998) https://doi.org/10.1117/12.328222
Event: Eleventh International Vavilov Conference on Nonlinear Optics, 1997, Novosibirsk, Russian Federation

Abstract

Second harmonic generation has hitherto been thought of as simultaneous with the excitation pulse which generates it. Recent experiments in Cs vapor demonstrate otherwise. A short two-photon 6D - 6S resonant excitation pulse in Cs vapor generates a superposition state which would radiate immediately were it not for destructive interference arising from the sample being large compared to the radiation wavelength. The radiation pattern of an isolated radiator (atom) starts out with a null in the plane transverse to the polarization (linear) direction but then rotates about the applied transverse magnetic field developing a radiation component along the phase matched direction which we detect. Experimental results are presented in excellent agreement with theory. Previous delay discrepancies have been resolved by using a nonmetallic sample cell. Cascade and yoked superfluorescence take place but not significantly until after the second harmonic emissions. Quantitative measurements of signal intensity are also presented.

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A. I. Lvovsky and Sven R. Hartmann "Time-delayed second-harmonic generation in an atomic vapor of cesium", Proc. SPIE 3485, 11th International Vavilov Conference on Nonlinear Optics, (21 October 1998); https://doi.org/10.1117/12.328222

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KEYWORDS

Magnetism

Cesium

Sensors

Harmonic generation

Chemical species

Picosecond phenomena

Doppler effect

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