Terahertz-frequency (THz) waves have shown potential for a wide range of applications. We have developed tunable THz-wave sources using nonlinear optical crystals, which have several advantages, including frequency agility, wide tunability, high output, and high coherency. We found that the organic nonlinear crystal of 4-dimethylamino-N-methyl-4-stilbazolium-tosylate (DAST) had particular potential for ultra-wide THz-wave generation from sub-THz to mid-infrared frequencies. Using DAST, we manufactured a coherent, tunable source (1-40 THz) with frequency agility. Moreover, we demonstrated THz-wave detection through up-conversion using DAST or MgO:LiNbO₃ nonlinear optical crystals, which provided a fast response, high sensitivity, and room-temperature operation.

Date Published: 23 February 2009
PDF: 8 pages
Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 71970C (23 February 2009); doi: 10.1117/12.808618

Published in SPIE Proceedings Vol. 7197:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII
Peter E. Powers, Editor(s)