We present a high-power and broadband terahertz(THz)time-domain spectroscopy setup utilizing the nonlinear organic crystal MNA both as an emitter and a detector.The THz source is based on optical rectification of near...We present a high-power and broadband terahertz(THz)time-domain spectroscopy setup utilizing the nonlinear organic crystal MNA both as an emitter and a detector.The THz source is based on optical rectification of nearinfrared laser pulses at a central wavelength of 1036 nm from a commercial,high-power Yb-based laser system and reaches a high THz average power of 11 mW at a repetition rate of 100 kHz and a broad bandwidth of more than 9 THz without a significant power fall-off in the higher THz frequency components.The conversion efficiency is high(0.13%)in spite of the high excitation average power of 8 W.We validate the high dynamic range and reliability of the source for applications in linear spectroscopy by measuring the broadband THz properties ofχ(2)nonlinear crystals up to 8 THz.This new high-repetition-rate source is very promising for ultra-broadband THz spectroscopy at high dynamic range and/or reduced measurement time.展开更多
基金Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen(terahertz.NRW program Netzwerke 2021)Ruhr-Universit?t Bochum(DFG Open Access Publication Funds)Deutsche Forschungsgemeinschaft(SFB/TRR196 MARIE project M01 and C07,PR1413/3-2,EXC-2033-Projektnummer390677874-RESOLV)。
文摘We present a high-power and broadband terahertz(THz)time-domain spectroscopy setup utilizing the nonlinear organic crystal MNA both as an emitter and a detector.The THz source is based on optical rectification of nearinfrared laser pulses at a central wavelength of 1036 nm from a commercial,high-power Yb-based laser system and reaches a high THz average power of 11 mW at a repetition rate of 100 kHz and a broad bandwidth of more than 9 THz without a significant power fall-off in the higher THz frequency components.The conversion efficiency is high(0.13%)in spite of the high excitation average power of 8 W.We validate the high dynamic range and reliability of the source for applications in linear spectroscopy by measuring the broadband THz properties ofχ(2)nonlinear crystals up to 8 THz.This new high-repetition-rate source is very promising for ultra-broadband THz spectroscopy at high dynamic range and/or reduced measurement time.
