DIFFRACTION GRATING ARRAY

To provide a diffraction grating array which can increase the efficiency of light reception by a simple and small structure when the array receives light by using a diffraction grating.SOLUTION: A grating pattern (13A2) and a grating pattern (13A3) are partially overlapped so that a diffraction grat...

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Bibliographic Details
Main Authors NAKAO JURI, ODA TOSHIHIRO, INOUE DAISUKE, SHIMOGAKI TETSUYA, ICHIKAWA TADASHI, YAMASHITA TATSUYA
Format Patent
LanguageEnglish
Japanese
Published 07.09.2023
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:To provide a diffraction grating array which can increase the efficiency of light reception by a simple and small structure when the array receives light by using a diffraction grating.SOLUTION: A grating pattern (13A2) and a grating pattern (13A3) are partially overlapped so that a diffraction grating having a grating pattern group (13Ax) is formed. The grating pattern (13A2) and the grating pattern (13A3) are overlapped at a peripheral region of each of the grating patterns (13A2, 13A3) which has a small intensity of electric field. In that way, the intensity of the electric field in the overlapping site is increased and the efficiency of light reception is increased.SELECTED DRAWING: Figure 5 【課題】簡素かつ小規模な構成で、回折格子を用いて光を受光する場合における受光効率を向上することができる回折格子アレイを提供する。【解決手段】格子パターン（１３Ａ２）と格子パターン（１３Ａ３）との一部を重複させて格子パターン群（１３Ａｘ）を有する回折格子を形成する。格子パターン（１３Ａ２）と格子パターン（１３Ａ３）とは、格子パターン（１３Ａ２、１３Ａ３）の各々における電界強度が小さい周辺部位を、重複させる。これによって、重複部位における電界強度が増加し、受光効率が向上する。【選択図】図５
Bibliography:Application Number: JP20230113730