Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal

• Main Authors: Cheng, Liang, Xiong, Ying, Kang, Lixing, Gao, Yu, Chang, Qing, Chen, Mengji, Qi, Jingbo, Yang, Hyunsoo, Liu, Zheng, Song, Justin Chien Wen, Chia, Elbert E. M.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2023
• Subjects: Centrosymmetry; Nonlinear Optical Devices
• Online Access: https://hdl.handle.net/10356/168789
• Institution: Nanyang Technological University

Strong second-order optical nonlinearities often require broken material centrosymmetry, thereby limiting the type and quality of materials used for nonlinear optical devices. Here, we report a giant and highly tunable terahertz (THz) emission from thin polycrystalline films of the centrosymmetric D...