%AZhang, Ming-Hao%AXiao, Wen%AWang, Wei-Min%AZhang, Rui%AZhang, Cun-Lin%AZhang, Xi-Cheng%AZhang, Liang-Liang%BJournal Name: Optics Express; Journal Volume: 30; Journal Issue: 21; Related Information: CHORUS Timestamp: 2022-10-07 10:21:50 %D2022%IOptical Society of America; None %JJournal Name: Optics Express; Journal Volume: 30; Journal Issue: 21; Related Information: CHORUS Timestamp: 2022-10-07 10:21:50 %K %MOSTI ID: 10373142 %PMedium: X %THighly sensitive detection of broadband terahertz waves using aqueous salt solutions %X
Water-based coherent detection of broadband terahertz (THz) wave has been recently proposed with superior performances, which can alleviate the limited detection bandwidth and high probe laser energy requirement in the solid- and air-based detection schemes, respectively. Here, we demonstrate that the water-based detection method can be extended to the aqueous salt solutions and the sensitivity can be significantly enhanced. The THz coherent detection signal intensity scales linearly with the third-order nonlinear susceptibility