2023 Fiscal Year Final Research Report
Long-range guided surface waves with transverse spin and subwavelength confinement for optical switching and sensing
| Project/Area Number |
21H01383
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 21060:Electron device and electronic equipment-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
何 亜倫 東京大学, 大学院理学系研究科(理学部), 特任助教 (20815386)
松井 裕章 東京大学, 大学院工学系研究科(工学部), 准教授 (80397752)
古川 克子 東京大学, 大学院工学系研究科(工学部), 准教授 (90343144)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | surface wave / light confinement / coherent light source / optical sensing |
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| Outline of Final Research Achievements |
Generating, guiding, and manipulating surface waves with strong spatial confinement and long propagation lengths represents the ultimate goal for on-chip sensing and information processing. So far, spatial confinement of surface waves has been achieved using surface plasmon waves, but they suffer from short propagation lengths due to metal losses. Here, we propose a guided surface wave platform consisting of ultra-thin slab guides on a photonic crystal. We show that the proposed guided surface wave platform enables the fabrication and integration of various functional micro-components on a single chip. Particularly, slab guides fabricated by top-down technologies are designed to control the surface wave propagation direction and combine to form optical logic gates. Additionally, light sources are integrated on the same chip by patterning slabs made of a gain material.
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| Free Research Field |
nano-optics
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| Academic Significance and Societal Importance of the Research Achievements |
A platform for surface waves was proposed with different functionalities. By controlling the shape and material of the slabs used to guide the surface waves, optical circuits can be patterned and used to perform various functions such as detection, optical logic operation, and coherent emission.
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