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

M. Martin (1) , Juliette Mangeney (1) , Paul Crozat (1) , Patrick Mounaix (2)

1 IEF - Institut d'électronique fondamentale
2 CPMOH - Centre de physique moléculaire optique et hertzienne

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.

M. Martin, Juliette Mangeney, Paul Crozat, Patrick Mounaix. 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. Applied Physics Letters, 2010, 97 (11), pp.111112 (1-3). ⟨10.1063/1.3490706⟩. ⟨hal-00671179⟩