Coherent terahertz radiation detection: Direct comparison between free-space electro-optic sampling and antenna detection

Autor:	Y. Cai, Jason Blain Stark, John Lopata, X. C. Zhang, Igal Brener, L. N. Pfeiffer, Q. Wu, J. D. Wynn, John F. Federici
Rok vydání:	1998
Předmět:	Physics Physics and Astronomy (miscellaneous) business.industry Terahertz radiation Bolometer law.invention Optics Sampling (signal processing) law Modulation Optoelectronics Laser power scaling Antenna (radio) business Frequency modulation Common emitter
Zdroj:	Applied Physics Letters. 73:444-446
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.121894
Popis:	We compare the use of free-space electro-optic sampling (FSEOS) with photoconducting antennas to detect terahertz (THz) radiation in the range of 0.1–3 THz. For the same average THz power and low-frequency modulation, signal-to-noise ratio and sensitivity are better with antenna detection at frequencies smaller than 3 THz. When the modulation frequency is increased to more than 1 MHz in FSEOS, both detection schemes have comparable performance. Using a singular-electric-field THz emitter, we demonstrate the feasibility of a THz imaging system using real-time delay scanning in FSEOS and only 20 mW of laser power.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2025929a114ed9f08a6fc772aa599c79 https://doi.org/10.1063/1.121894 Zobrazit plný text záznamu