2017年5月
Light propagation in ultra-thin gap in 3D photonic crystals
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
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- 巻
- 24
- 号
- 開始ページ
- 58
- 終了ページ
- 62
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.photonics.2017.03.003
- 出版者・発行元
- ELSEVIER SCIENCE BV
We investigate the propagation of light in an ultra-thin gap in stacked-stripe three-dimensional (3D) photonic crystals operating in the near-infrared wavelength range. We fabricate 3D photonic crystals composed of 32 stacked layers with an artificially introduced gap (similar to 200 nm) in the center of the structure by using a wafer bonding method. In order to study the characteristics of the gap, we introduce oblique waveguides to connect the gap with the upper and lower sides of the photonic crystal. The observation of light output from waveguides that are distant from the waveguide used for incident light demonstrates for the first time that light propagates along the air gap and is distributed to multiple output waveguides. Moreover, we perform calculations that reveal the formation of a propagation mode resulting from introduction of the ultra-thin gap. We analyze the coupling between the propagation mode and the oblique waveguide mode and discuss the characteristics of light distribution via the gap. (C) 2017 Published by Elsevier B.V.
- リンク情報
- ID情報
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- DOI : 10.1016/j.photonics.2017.03.003
- ISSN : 1569-4410
- eISSN : 1569-4429
- Web of Science ID : WOS:000401043300011