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Terahertz Crystals

The THz pulse radiation, most commonly generated through optical rectification by exciting [110] ZnTe crystal. GaSe crystals if often used for THz generation shows a large bandwidth of up to 41 THz. Due to broadband THz generation and detection using a fs laser source, GaSe emitter-detector system performance is considered to achieve comparable or even better results than using thin ZnTe crystals. In order to achieve frequency selective THz wave generation and detection system, GaSe crystals of appropriate thickness should be used.