Pavlov SG, Hübers HW, Hovenier JN, Klaassen TO, Carder DA, Phillips PJ, Redlich B, Riemann H, Zhukavin RK, Shastin VN. Stimulated terahertz stokes emission of silicon crystals doped with antimony donors.
Phys Rev Lett 2006;
96:037404. [PMID:
16486768 DOI:
10.1103/physrevlett.96.037404]
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Abstract
Stimulated Stokes emission has been observed from silicon crystals doped by antimony donors when optically excited by radiation from a tunable infrared free electron laser. The photon energy of the emission is equal to the pump photon energy reduced by the energy of the intervalley transverse acoustic (TA) g phonon in silicon (approximately 2.92 THz). The emission frequency covers the range of 4.6-5.8 THz. The laser process occurs due to a resonant coupling of the 1s(E) and 1s(A1) donor states (separation approximately 2.97 THz) via the g-TA phonon, which conserves momentum and energy within a single impurity center.
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