A New Phase-Coherent Light Scattering Method: First Observation of Complex Brillouin Spectra
作者： Hajime Tanaka , Tsuyoshi Sonehara , Shinsaku Takagi
DOI: 10.1103/PHYSREVLETT.79.881
关键词:
摘要: We demonstrate here a new phase-coherent light scattering method. Spontaneous Brillouin is caused by thermally excited phonons whose phases have no physical meaning because of their random, incoherent nature. However, coherent having phase information can be generated resonantly an optically induced scanning interference pattern, when the dispersion relation satisfied. By phase-sensitive detection scattered phonons, we succeeded in measuring complex resonance spectra acoustic which call spectra, with ultimate signal-to-noise ratio.
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