Abstract
Solar-blind ultraviolet detection is of great importance in astronomy and industrial and military applications. Here, we report enhanced solar-blind ultraviolet single-photon detection by a normal silicon avalanche photodiode (Si APD) single-photon detector with a specially designed photon-collecting device. By re-focusing the reflected photon from the Si chip surface on the detection area by the aluminum-coated hemisphere, the detection efficiency of the Si APD at 280 nm can be improved to 4.62%. This system has the potential for high-efficiency photon detection in the solar-blind ultraviolet regime with low noise.
| Original language | English |
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| Article number | 030401 |
| Journal | Chinese Optics Letters |
| Volume | 14 |
| Issue number | 3 |
| DOIs | |
| State | Published - 10 Mar 2016 |