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Author  |
Kataoka, T; Kajikawa, K.; Kitagawa, J.; Kadoya, Y; Takemura, Y. | ||||
| Title | Improved sensitivity of terahertz detection by GaAs photoconductive antennas excited at 1560 nm | Type | Journal Article | ||
| Year | 2010 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume | 97 | Issue | Pages | 201110 (1-3) | |
| Keywords | photoconductive antenna (PCA) | ||||
| Abstract | 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. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 904 | |||
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