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- Title
Movable high-Q nanoresonators realized by semiconductor nanowires on a Si photonic crystal platform.
- Authors
Birowosuto, Muhammad Danang; Yokoo, Atsushi; Zhang, Guoqiang; Tateno, Kouta; Kuramochi, Eiichi; Taniyama, Hideaki; Takiguchi, Masato; Notomi, Masaya
- Abstract
Subwavelength semiconductor nanowires have recently attracted interest for photonic applications because they possess various unique optical properties and offer great potential for miniaturizing devices. However, realizing tight light confinement or efficient coupling with photonic circuits is not straightforward and remains a challenge. Here we show that a high-Q nanocavity can be created by placing a single III-V semiconductor nanowire with a diameter of under 100 nm in a grooved waveguide in a Si photonic crystal, by means of nanoprobe manipulation. We observe very fast spontaneous emission (91 ps) from nanowires accelerated by the strong Purcell enhancement in nanocavities, which proves that very strong light confinement can be achieved. Furthermore, this system enables us to move the nanocavity anywhere along the waveguide. This configuration provides a significant degree of flexibility in integrated photonics and permits the addition and displacement of various functionalities of III-V nanocavity devices in Si photonic circuits.
- Subjects
PHOTONIC crystals; OPTICAL properties; NANOWIRES; PHOTON emission; PHOTONICS; MINIATURE electronic equipment
- Publication
Nature Materials, 2014, Vol 13, Issue 3, p279
- ISSN
1476-1122
- Publication type
Article
- DOI
10.1038/nmat3873