PHOTODETECTOR AND LIDAR APPARATUS USING THE SAME

• Main Authors: HONDA HIRONAGA, FUNAKI HIDEYUKI, SUZUKI KAZUHIRO, ISHII KOICHI, UENO RISAKO, YONEHARA KENYA
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2017
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; BASIC ELECTRIC ELEMENTS; COLORIMETRY; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GYROSCOPIC INSTRUMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; RADIATION PYROMETRY; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SEMICONDUCTOR DEVICES; SURVEYING; TESTING

PROBLEM TO BE SOLVED: To provide a photodetector with a high detection sensitivity of light in a near infrared wavelength band, and a lidar apparatus using the photodetector.SOLUTION: A photodetector according to an embodiment comprises: a first semiconductor layer; a porous semiconductor layer disposed on the first semiconductor layer; and at least one optical detection element having a second semiconductor layer of a first conductivity type disposed on a region of a part of the porous semiconductor layer, and a third semiconductor layer of a second conductivity type disposed on the second semiconductor layer.SELECTED DRAWING: Figure 1 【課題】近赤外の波長帯域の光の検出感度が高い光検出器およびこれを用いたライダー装置を提供する。【解決手段】本実施形態による光検出器は、第１半導体層と、前記第１半導体層に配置された多孔質半導体層と、前記多孔質半導体層の一部の領域に配置された第１導電型の第２半導体層と、前記第２半導体層上に配置された第２導電型の第３半導体層と、を有する少なくとも１つの光検出素子と、を備えている。【選択図】図１