Emission of Submillimeter Electromagnetic Waves by Coherent Phonons.
نویسندگان
چکیده
We report on the first observation of the emission of electromagnetic radiation from coherent lattice vibrations in a semiconductor. Coherent optical phonons are excited by ultrashort laser pulses in singlecrystal tellurium. THz frequency radiation emitted by the Dember-field-driven phonons is detected by time-resolved THz-emission spectroscopy. The measurements are complemented by optical pump-probe experiments with a polarization-sensitive detection scheme utilizing the symmetry of the Raman tensor.
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ورودعنوان ژورنال:
- Physical review letters
دوره 74 5 شماره
صفحات -
تاریخ انتشار 1995