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arXiv · 0904.4634

High-resolution Resonance Bragg-scattering spectroscopy of an atomic transition from a population difference grating in a vapor cell

Hai Wang*·Xudong Yang·Shujing Li·Chunhong Zhang·Changde Xie·Kunchi Peng
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Abstract

The laser spectroscopy with a narrow linewidth and high signal to noise ratio (S/N) is very important in the precise measurement of optical frequencies. Here, we present a novel high-resolution backward resonance Bragg-scattering (RBS) spectroscopy from a population difference grating (PDG). The PDG is formed by a standing-wave (SW) pump field in thermal 87Rb vapor, which periodically modulates the space population distribution of two levels in the 87Rb D1 line. A probe beam, having the identical frequency and the orthogonal polarization with the SW pump field, is Bragg-scattered by the PDG. Such Bragg-scattered light becomes stronger at an atomic resonance transition, which forms the RBS spectrum with a high S/N and sub-natural linewidth. Using the scheme of the coherent superposition of the individual Rayleigh-scattered light emitted from the atomic dipole oscillators on the PDG, the experimentally observed RBS spectroscopy is theoretically explained.

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Hai Wang*, Xudong Yang, Shujing Li, Chunhong Zhang, Changde Xie, Kunchi Peng. 2009-04-29. High-resolution Resonance Bragg-scattering spectroscopy of an atomic transition from a population difference grating in a vapor cell. https://doi.org/10.1088/0953-4075%2F43%2F13%2F135403

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