%0 Journal Article
%T Improved sensitivity of terahertz detection by GaAs photoconductive antennas excited at 1560 nm
%A Kataoka, T.
%A Kajikawa, K.
%A Kitagawa, J.
%A Kadoya, Y.
%A Takemura, Y.
%J Appl. Phys. Lett.
%D 2010
%V 97
%F Kataoka_etal2010
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=904), last updated on Tue, 28 Jan 2014 20:12:10 -0600
%X The terahertz detection by photoconductive antennas (PCAs) based on low-temperature grown (LTG) GaAs with 1.5 μm pulse excitation was revisited. We found that the detection efficiency can be improved by a factor of 10 (20 dB) by reducing the excitation spot size and the gap length of the PCA, maintaining the low noise feature of the PCA on LTG GaAs. As a result, the signal-to-noise ratio higher than 50 dB was obtained at a reasonable incident power of 9.5 mW, suggesting that the scheme is promising for the detection of terahertz waves in practical time domain systems.
%K photoconductive antenna (PCA)
%P 201110 (1-3)