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Spectral behavior of frequency combs in (a) optical, (b) terahertz, and (c) rf regions.
Amplitude spectrum of terahertz frequency comb obtained with multifrequency-heterodyning photoconductive detection. (a) Bowtie-photoconductive terahertz emitter and bowtie-photoconductive terahertz detector and (b) bowtie-photoconductive terahertz emitter and dipole-photoconductive terahertz detector are used. An enlarged terahertz-comb spectrum is also shown as an inset. Frequency scale in terahertz and rf combs is indicated at lower and upper horizontal coordinates, respectively.
Terahertz amplitude spectra obtained with (a) stage-scanning THz-TDS and (b) AOS-THz-TDS. Bowtie-photoconductive terahertz emitter and bowtie-photoconductive terahertz detector are used.
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