公开(公告)号：US20250118902A1

公开(公告)日：2025-04-10

申请号：US18988255

申请日：2024-12-19

Applicant: FUJIFILM Corporation

Inventor： Tatsuya YOSHIHIRO ,  Yukito SAITOH ,  Taketo OTANI ,  Makoto SHIMIZU ,  Shinichi KANNA

IPC: H01Q15/10 ,  H01Q3/46

Abstract: A thin metasurface structure where a phase difference of transmitted electromagnetic waves is large and a transmittance with respect to the electromagnetic waves is also high. A metasurface structure that acts on electromagnetic waves having a frequency of 10 THz or less and is obtained by laminating a first structure layer where first metal microstructures are arranged, a second structure layer where second metal microstructures are arranged, a third structure layer where third metal microstructures are arranged, and a fourth structure layer where fourth metal microstructures are arranged to be spaced from each other.

公开(公告)号：US20220145183A1

公开(公告)日：2022-05-12

申请号：US17584110

申请日：2022-01-25

Applicant: FUJIFILM Corporation

Inventor： Yukito SAITOH ,  Katsumi SASATA ,  Makoto SHIMIZU

IPC: C09K19/60 ,  H01S3/213 ,  C09K19/38 ,  C09K11/06

Abstract: Provided is a laser oscillation element including a cholesteric liquid crystal layer, in which even in a case where the intensity of excitation light is weak, laser oscillation can be induced. The laser oscillation element includes a cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound, in which in a cross-section of the cholesteric liquid crystal layer observed with a scanning electron microscope, bright portions and dark portions derived from the cholesteric liquid crystalline phase are tilted with respect to a main surface of the cholesteric liquid crystal layer, the cholesteric liquid crystal layer includes a colorant that emits light by excitation, and a luminescence wavelength range of the colorant and a selective reflection wavelength range of the cholesteric liquid crystal layer at least partially overlap each other.