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

Y. Cai, I. Brener, J. Lopata, J. Wynn, L. Pfeiffer, J. B. Stark, Q. Wu, X. C. Zhang, J. F. Federici

Research output: Contribution to journalReview articlepeer-review

137 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)444-446
Number of pages3
JournalApplied Physics Letters
Volume73
Issue number4
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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