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Abstract
Strongly enhanced light emission at wavelengths between 1.3 and 1.6 μm is reported at room temperature in silicon photonic crystal (PhC) nanocavities with optimized out-coupling efficiency. Sharp peaks corresponding to the resonant modes of PhC nanocavities dominate the broad sub-bandgap emission from optically active defects in the crystalline Si membrane. We measure a 300-fold enhancement of the emission from the PhC nanocavity due to a combination of far-field enhancement and the Purcell effect. The cavity enhanced emission has a very weak temperature dependence, namely less than a factor of 2 reduction between 10 K and room temperature, which makes this approach suitable for the realization of efficient light sources as well as providing a quick and easy tool for the broadband optical characterization of silicon-on-insulator nanostructures.
Original language | English |
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Article number | 201106 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 98 |
Issue number | 20 |
DOIs | |
Publication status | Published - May 2011 |
Keywords
- Photonic crystals
- Photoluminescence
- Silicon
- Nonlinear acoustics
- Purcell effect
- Activation energies
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Dive into the research topics of 'Room-temperature emission at telecom wavelengths from silicon photonic crystal nanocavities'. Together they form a unique fingerprint.Projects
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Lasing of Erbium in Crystalline silicon: Lasing of Erbium in crystalline silicon Photonic Nanostructures - LECSIN
O'Faolain, L. (PI) & Krauss, T. F. (CoI)
25/02/10 → 24/02/13
Project: Standard