Broadband and High‐Sensitivity Time‐Resolved THz System Using Grating‐Assisted Tilted‐Pulse‐Front Phase Matching

• DOI: 10.1002/adom.202101136
• Publication Date: 2021-10-21T10:28:11Z
• Authors: Wei Cui; Kashif Masud Awan; Rupert Huber; Ksenia Dolgaleva; Jean‐Michel Ménard
• Keywords: ddc:530; 02 engineering and technology; 530 Physik; 0210 nano-technology

Abstract A broadband and sensitive time‐resolved terahertz (THz) configuration relying on noncollinear optical interactions is presented. This scheme enables a higher THz generation detection efficiency in nonlinear crystals. The concept relies pair of thick (2 mm) GaP crystals with phase grating etched their surface to achieve matching between diffracted near‐infrared pulse wave propagating at normal incidence. system compared standard collinear based thin (0.2 and, while both systems provide access spectral bandwidth extending up 6.5 THz, it found that the improves signal by more than factor 400 dynamic range 30 dB frequency 3 THz.