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This work presents a nanoplasmonic photoconductive antenna (NP-PCA) for high power terahertz emission. Plasmonically matched metal nanostructures are integrated on a photoconductive bow-tie type THz antenna by incorporating microfabrication and electron-beam lithography. The plasmonic resonance wavelength of metal nanostructure is matched with the optical wavelength of incident pulsed beam. Metal...
Frequency-comb-based Fourier transform spectrometer operating in the 2100–3600 cm−1 range is presented. System allows rapid acquisition of broadband high resolution (120 MHz) spectra, detecting ppb-level concentrations of various molecules in 30s.
We report on direct stabilization of a femtosecond comb to a stable optical cavity with an analysis of various stabilization schemes. An absolute fractional frequency instability of <7 /spl times/ 10/sup -14/ at 1 second is measured.
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