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Title: Plasmonics-enhanced photoconductive terahertz detector pumped by Ytterbium-doped fiber laser

Journal Article · · Optics Express
DOI: https://doi.org/10.1364/oe.386368 · OSTI ID:1595491

We present a photoconductive terahertz detector operating at the 1 µm wavelength range at which high-power and compact Ytterbium-doped femtosecond fiber lasers are available. The detector utilizes an array of plasmonic nanoantennas to provide sub-picosecond transit time for the majority of photo-generated carriers to enable high-sensitivity terahertz detection without using a short-carrier-lifetime substrate. By using a high-mobility semiconductor substrate and preventing photocarrier recombination, the presented detector offers significantly higher sensitivity levels compared with previously demonstrated broadband photoconductive terahertz detectors operating at the 1 µm wavelength range. We demonstrate pulsed terahertz detection over a 4 THz bandwidth with a record-high signal-to-noise ratio of 95 dB at an average terahertz radiation power of 6.8 µW, when using an optical pump power of 30 mW.

Research Organization:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); US Department of the Navy, Office of Naval Research (ONR); Moore Foundation
Grant/Contract Number:
SC0016925; N000141912052
OSTI ID:
1595491
Alternate ID(s):
OSTI ID: 1803095; OSTI ID: 2001464
Journal Information:
Optics Express, Vol. 28, Issue 3; ISSN 1094-4087
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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