Optical phase detection in a 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate crystal for terahertz time domain spectroscopy system at 1.55 μm wavelength

Martin, M.; Mangeney, J.; Crozat, P.; Mounaix, P.
September 2010
Applied Physics Letters;9/13/2010, Vol. 97 Issue 11, p111112
Academic Journal
We report the electro-optic detection of terahertz (THz) pulses in a 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate crystal (DAST) using optical phase detection technique and femtosecond optical pulses at telecom wavelength. A THz time-domain spectroscopy system based on 1.55 μm wavelength fiber laser pulses that integrates an ion-irradiated In0.53Ga0.47As photoconductive antenna as the emitter and a DAST electro-optic crystal as the detector is shown to provide a detection bandwidth of 5 THz.


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