公开(公告)号：US20240319081A1

公开(公告)日：2024-09-26

申请号：US18607867

申请日：2024-03-18

Applicant: SHIMADZU CORPORATION ,  Kyoto University

Inventor： Hideaki KATSU ,  Koji TOJO ,  Kenji TAKUBO ,  Yuya NAGATA ,  Shigeki TAKEUCHI ,  Ryo OKAMOTO

IPC: G01N21/31

CPC classification number: G01N21/31

Abstract: The quantum optical system changes a phase of quantum interference occurring between a plurality of physical processes, in each of which a quantum entangled photon pair of a signal photon and an idler photon is generated. Each of a plurality of pixels outputs a detection signal of the signal photon in a state where a sample is arranged in an optical path of the idler photon. A processor calculates an absorption spectroscopy characteristic based on an interferogram indicating a variation in a signal intensity acquired from each of the plurality of pixels in accordance with the change in the phase of the quantum interference. The processor: applies a processing to reduce phase difference of the interferogram among the plurality of pixels; spatially integrates, over the plurality of pixels, the interferogram having gone through the processing to reduce phase differences; and calculates the absorption spectroscopy characteristic based on the integrated interferogram.

公开(公告)号：US20240385043A1

公开(公告)日：2024-11-21

申请号：US18694232

申请日：2022-09-08

Applicant: KYOTO UNIVERSITY

Inventor： Shigeki TAKEUCHI ,  Yu MUKAI ,  Ryo OKAMOTO

IPC: G01J3/433 ,  G01J3/02 ,  G01J3/12 ,  G01J3/26 ,  G01J3/28 ,  G02F1/35 ,  G02F1/355

Abstract: An image sensor (3) includes a light receiving surface on which a plurality of pixels are disposed, and detects a signal photon. A memory (42) stores, as a map, a correspondence between a parameter indicating the position of each pixel on the light receiving surface and the wavelength of the signal photon detected by the pixel. A processor (41) executes arithmetic processing for calculating the spectral characteristic of a sample disposed on an optical path of an idler photon. An optical system (21) includes a moving mirror (209) configured to apply modulation to the phase of 10 quantum interference. The processor (41) acquires, from a predetermined number of pixels disposed on the light receiving surface, a variation in a detection intensity of the signal photon generated by the modulation by moving mirror (209), and calculates the spectral characteristic based on the visibility of the quantum interference obtained from the variation and the map.

公开(公告)号：US20230020945A1

公开(公告)日：2023-01-19

申请号：US17757100

申请日：2020-12-04

Applicant: Kyoto University

Inventor： Shigeki TAKEUCHI ,  Ryo OKAMOTO ,  Yu MUKAI

IPC: G01J3/42 ,  G02F1/35 ,  G01N21/45

Abstract: A quantum absorption spectroscopy system (100) includes a laser light source (1), a quantum optical system (201), a photodetector (31), and a controller (4). The laser light source (1) emits pump light. The quantum optical system (201) includes a nonlinear optical crystal (23) that generates a quantum entangled photon pair of a signal photon and an idler photon by irradiation with pump light, and a moving mirror (25) that changes a phase of the idler photon, and causes quantum interference between a plurality of physical processes in which the quantum entangled photon pair is generated. The photodetector (31) detects the signal photon when the phase of the idler photon is changed by the nonlinear optical crystal (23) in a state where a sample is disposed on an optical path of the idler photon, and outputs a quantum interference signal corresponding to the detected number of photons. The controller (4) calculates an absorption spectroscopy characteristic of the sample by performing Fourier transform on the quantum interference signal.