US 12,328,955 B2
Thin film and method for producing same, circularly polarized light detection element, device and method
Ayumi Nihei, Yokohama (JP); and Tsutomu Miyasaka, Machida (JP)
Assigned to JAPAN SCIENCE AND TECHNOLOGY AGENCY, Kawaguchi (JP)
Appl. No. 17/998,203
Filed by JAPAN SCIENCE AND TECHNOLOGY AGENCY, Kawaguchi (JP)
PCT Filed May 25, 2021, PCT No. PCT/JP2021/019745
§ 371(c)(1), (2) Date Nov. 8, 2022,
PCT Pub. No. WO2021/241554, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 2020-093727 (JP), filed on May 28, 2020.
Prior Publication US 2023/0231069 A1, Jul. 20, 2023
Int. Cl. H10K 50/86 (2023.01); G01J 4/04 (2006.01); H10F 30/00 (2025.01); H10K 71/12 (2023.01); H10K 85/50 (2023.01)
CPC H10F 30/00 (2025.01) [G01J 4/04 (2013.01); H10K 71/12 (2023.02); H10K 85/50 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A thin film for detecting a circularly polarized light, comprising:
a plurality of inorganic layers constituting a layered structure and/or a plurality of inorganic chains constituting a chain structure, which are formed of a perovskite type substance; and
chiral molecules incorporated in at least a part of a boundary part between the adjacent inorganic layers and/or between the inorganic chains,
wherein the chiral molecules include only one of S-form chiral molecules and R-form chiral molecules, or
chiral molecules with a higher abundance proportion of one of S-form chiral molecules and R-form chiral molecules than an abundance proportion of the other of the S-form chiral molecules and R-form chiral molecules, and
wherein the crystal structure of the perovskite type substance is oriented in a predetermined direction.