Other

Id Quantique Sa

Wooriro Co., Ltd.

Soo Hyun Baek

Chan Yong Park

Chul Woo Park

Jung Hyun Kim

Seok Beom Cho

A photon detection device having a high light detection efficiency. The photon detection device includes a first light reception part which receives a gate signal and outputs a first signal; a second light reception part which receives a gate signal and outputs a second signal; and a determination part which determines whether or not a photon is received, on the basis of the first signal from the first light reception part and the second signal from the second light reception part. The photon is incident on the first light reception part among the first light reception part and the second light reception part, and the breakdown voltage of the second light reception part is higher than the breakdown voltage of the first light reception part.

Detection of photon by pairing avalanche photodiodes with different threshold voltages

According to an embodiment, a single photon detector configured to reduce a dark current comprises a buffer layer, a light absorption layer, a grading layer, an electric field control layer, and a window layer sequentially formed on a substrate. An active area may be formed in the window layer. A barrier junction may be formed through the window layer up to at least a portion of the light absorption layer, around the active area.

Single photon detector and system for minimizing dark current

Growing community of inventors

Gwangju, South Korea

Soo Hyun Baek