| Paper Abstract and Keywords |
| Presentation |
2026-01-30 10:20
[Poster Presentation]
Optical Design and Fundamental Experiments of Liquid-Crystal Controlled Lightguides for Optical Wireless Power Receivers
Yuki Murayama, Masakazu Nakatani, Hideo Fujikake (Tohoku Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Optical wireless power transmission, combining lasers and receivers for cable-free power to mobile devices, is attracting attention for overcoming wiring constraints. Since high-efficiency power-generating elements are expensive, downsizing is required. Previous receiver used spherical lenses and radial lightguides for light collection. However, this receiver required physical movement of power-generating elements to match incident angles, causing efficiency loss from light leakage in gaps. This study proposes a novel structure placing liquid-crystal (LC) controlled lightguides beneath radial lightguides to guide light without moving parts. We designed LC alignments to control p-polarized light transmission and reflection based on the lightguide's refractive index. Optical experiments using low-refractive-index glass (n=1.52) at a designed incident angle of 84° confirmed voltage-induced changes in transmitted light intensity, validating the design. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Optical wireless power transmission (OWPT) / Liquid crystal / Refractive index anisotropy / Optical switching / / / / |
| Reference Info. |
ITE Tech. Rep., vol. 50, no. 2, IDY2026-19, pp. 73-76, Jan. 2026. |
| Paper # |
IDY2026-19 |
| Date of Issue |
2026-01-22 (IDY) |
| ISSN |
Online edition: ISSN 2424-1970 |
| Download PDF |
|
| Conference Information |
| Committee |
IEICE-EID IDY IEE-EDD SID-JC IEIJ-SSL |
| Conference Date |
2026-01-29 - 2026-01-30 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
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| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
IDY |
| Conference Code |
2026-01-EID-IDY-EDD-JC-SSL |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Optical Design and Fundamental Experiments of Liquid-Crystal Controlled Lightguides for Optical Wireless Power Receivers |
| Sub Title (in English) |
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| Keyword(1) |
Optical wireless power transmission (OWPT) |
| Keyword(2) |
Liquid crystal |
| Keyword(3) |
Refractive index anisotropy |
| Keyword(4) |
Optical switching |
| Keyword(5) |
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| 1st Author's Name |
Yuki Murayama |
| 1st Author's Affiliation |
Tohoku University (Tohoku Univ.) |
| 2nd Author's Name |
Masakazu Nakatani |
| 2nd Author's Affiliation |
Tohoku University (Tohoku Univ.) |
| 3rd Author's Name |
Hideo Fujikake |
| 3rd Author's Affiliation |
Tohoku University (Tohoku Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2026-01-30 10:20:00 |
| Presentation Time |
5 minutes |
| Registration for |
IDY |
| Paper # |
IDY2026-19 |
| Volume (vol) |
vol.50 |
| Number (no) |
no.2 |
| Page |
pp.73-76 |
| #Pages |
4 |
| Date of Issue |
2026-01-22 (IDY) |