2015 Fiscal Year Final Research Report
Control of germanium light emission using nanobeam-type optical nanocavity and a challenge for lasing action
| Project/Area Number |
24686043
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | フォトニック結晶 / ナノ共振器 / ゲルマニウム |
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| Outline of Final Research Achievements |
We fabricated germanium photonic crystal (PhC) nanobeam cavities and observed enhanced photoluminescence at the cavity resonances at room temperature. We achieve the cavity Qs of 1,350 and 1,850 for a L3-type and a lattice-modulated PhC nanobeam cavities, respectively. We also numerically demonstrated that a strong uniaxial tensile strain in an air-suspended germanium PhC nanobem cavity by combining the effects of a strained SiN film deposited on the top and of the pad structures that support the nanobeam. The induced strain reduces the energy difference between the conduction band minima of germanium at the G and L points inside the cavity region, where strong light-matter interaction is expected to take place.
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| Free Research Field |
ナノオプトエレクトロニクス
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