Journal
OPTICS LETTERS
Volume 33, Issue 18, Pages 2125-2127Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.33.002125
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- Engineering and Physical Sciences Research Council [EP/D025532/1] Funding Source: researchfish
- EPSRC [EP/D025532/1] Funding Source: UKRI
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We report what we believe to be the first demonstration of an all-semiconductor room-temperature terahertz time domain spectrometer. An optical Stark mode-locked vertical-external-cavity surface-emitting laser with 480 fs pulses at 1044 nm was used to illuminate low-temperature-grown photoconductive antennae with 5 mu m-gap bow-tie-shaped electrodes. The coherently detected spectrum has a bandwidth close to 1 THz, in which water absorption lines at 0.555 and 0.751 THz can be resolved. (c) 2008 Optical Society of America
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