2013 Fiscal Year Final Research Report
Development of coherent light source at subwavelength scale using spaser
| Project/Area Number |
24656385
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Kyoto University |
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Principal Investigator |
FUJITA Koji 京都大学, 工学(系)研究科(研究院), 准教授 (50314240)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 表面プラズモン / ナノレーザー |
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| Research Abstract |
In this research, we numerically examine an asymmetric spaser; a resonant system comprising a dielectric core capped by a metal semishell. The proposed spaser emits unidirectionally along the axis of the semishell; this directionality depends neither on the incident polarization nor on the incident angle of the pump. The spasing efficiency of the semishell-capped resonator is one order of magnitude higher than that in the closed core-shell counterpart. Our calculations indicate that symmetry breaking can serve as a route to create unidirectional, highly intense, single-particle, coherent light sources at subwavelength scale.
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