Title:
OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/024569
Kind Code:
A1
Abstract:
An optical system (101) comprises: a core (1A); an Si waveguide (2A) having an optical spot size different from that of the core (1A); and a metalens (3) that optically connects the core (1A) and the Si waveguide (2A). The metalens has a first surface (31A) facing a first waveguide, and a second surface (31B) facing the opposite side from the first surface. In the metalens, a through-hole (31C) penetrating a space between the first surface and the second surface is formed. The hole diameter of the through-hole is smaller than an object wavelength. The metalens is configured from an electric conductor. On the first surface of the metalens, a plurality of relief structures configured from the first surface and a plurality of annular grooves (31D) recessed from the first surface are formed. The plurality of relief structures are annularly formed so as to surround the through-hole in plan view.
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Inventors:
MATSUURA TAKUYA (JP)
FUKUURA TOMOHIRO (JP)
FUKUURA TOMOHIRO (JP)
Application Number:
PCT/JP2023/026257
Publication Date:
February 01, 2024
Filing Date:
July 18, 2023
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
G02B6/32; G02B3/08; G02B5/18; G02B6/30
Foreign References:
| JP2020173407A | 2020-10-22 | |||
| JP2022058082A | 2022-04-11 | |||
| US20120328240A1 | 2012-12-27 | |||
| US20220137259A1 | 2022-05-05 | |||
| CN111090148A | 2020-05-01 | |||
| JP2019533834A | 2019-11-21 | |||
| JP2019086765A | 2019-06-06 | |||
| US20160299337A1 | 2016-10-13 | |||
| US20220368024A1 | 2022-11-17 |
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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