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- Title
Large-scale arrays of ultrahigh-Q coupled nanocavities.
- Authors
Notomi, Masaya; Kuramochi, Eiichi; Tanabe, Takasumi
- Abstract
Coupled microresonators are expected to play a key role in slow-light engineering and various types of light-matter interaction enhancement, especially if they are based on small and high-Q cavities. Although rapid progress has been made on microresonator performance, large-scale arrays of coupled resonators based on high-Q wavelength-sized cavities have not yet been realized. Here, we show large-scale (N > 100) ultrahigh-Q coupled nanocavity arrays based on photonic crystals. This is the first demonstration of large-scale coupled resonator arrays based on wavelength-sized cavities, in which tight-binding sinusoidal dispersion is seen. We confirm that an ultrahigh value of Q (∼1 × 106) is maintained, even when N is large, and the resonators exhibit very low loss characteristics with regard to light propagation. The ultrahigh value of Q and small size has enabled us to achieve ultraslow light pulse propagation with a group velocity well below 0.01c and a long group delay.
- Subjects
SPEED of light; CAVITY resonators; PHOTONIC crystals; NANOPHOTONICS; DISPERSION (Chemistry)
- Publication
Nature Photonics, 2008, Vol 2, Issue 12, p741
- ISSN
1749-4885
- Publication type
Article
- DOI
10.1038/nphoton.2008.226