Single photon detector, electronic device, and LiDAR device
AssigneeTrupixel Inc.
InventorsMyung-Jae Lee, Do Kyung Hwang
Life of this patent
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Abstract
Disclosed is a single photon detector comprising a semiconductor substrate and a 2D material layer provided adjacent to the semiconductor substrate, the semiconductor substrate includes a first well having a first conductivity type, a heavily doped region having a second conductivity type different from the first conductivity type, and a depletion region provided between the first well and the heavily doped region.
Claims20
A single photon detector comprising:
- a first well having a first conductivity type;
- a heavily doped region provided on the first well and having a second conductivity type different from the first conductivity type;
- and
- a 2D material layer configured to absorb incident light and generate charges, the incident light having lower energy than a bandgap of the first well,
- wherein the charges are transferred to the first well so that the incident light is detected.
An electronic device comprising a single photon detector and a light-emitting device, wherein:
- the single photon detector, configured to detect incident light reflected by a subject after the light-emitting device emits light, comprises:
- a 2D material layer,
- a heavily doped region provided on the 2D material layer,
- a guard ring provided on a side surface of the heavily doped region and having a lower doping concentration than the heavily doped region, and
- a contact spaced apart from the heavily doped region,
- wherein the contact has a first conductivity type, and the heavily doped region and the guard ring have a second conductivity type different from the first conductivity type.
A LiDAR device comprising a light-emitting device and a single photon detector, configured to detect incident light reflected by a subject after the light-emitting device emits light and to measure a distance to the subject using time difference information between a transmission signal of the light-emitting device and a detection signal of the single photon detector, wherein:
- the single photon detector comprises:
- a 2D material layer,
- a heavily doped region provided on the 2D material layer,
- a guard ring provided on a side surface of the heavily doped region and having a lower doping concentration than the heavily doped region, and
- a contact spaced apart from the heavily doped region,
- wherein the contact has a first conductivity type, and
- wherein the heavily doped region and the guard ring have a second conductivity type different from the first conductivity type.
Dependencies are inferred from the claim text.