Masaya Nagai, Shingo Saito, Hideyuki Ohtake, T. Bessho, T. Sugiura, T. Hirosumi, M. Yoshida, Koichiro Tanaka
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Generation and detection of terahertz radiation by non-resonant nonlinear process in GaAs using 1.56 /spl mu/m fiber laser pulses
We demonstrate the generation and detection of a terahertz wave by non-resonant electro-optical processes with femtosecond 1.56 /spl mu/m laser pulses. Using a 0.5 mm-thick [110]-oriented GaAs wafer for optical rectification and electro-optical modulation, we achieve spectral sensitivity up to 3 THz. For high net efficiency of nonlinear process, it is important to evaluate the phase matching condition in electro-optical crystals.
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