標題: | Theoretical Study on Surface Mode in Photonic Crystal Fishbone Nanocavity |
作者: | Lu, Tsan-Wen Lee, Po-Tsung 光電工程學系 Department of Photonics |
關鍵字: | Nanocavity;optical sensors;optical tweezers;photonic crystals;surface wave |
公開日期: | 1-十一月-2015 |
摘要: | We propose and theoretically investigate a novel 1-D photonic crystal fishbone (FB) that can sustain surface waves. By designing a nanocavity in an FB, the confined surface mode with a high quality factor (similar to 10(5)) and extremely concentrated field near the FB surface (small mode volume, similar to 2.3 x 10(-2)(lambda/2)(3)) cause strong interactions between light and the surrounding medium for optical sensing and manipulation. In simulation, as an optical sensor, the proposed design achieved a high index sensitivity of 650 nm/RIU and minimum detectable index variation of 2 x 10(-5). As optical tweezers, a simulated injected optical threshold power of only 80 mu W is needed for stably trapping a polystyrene sphere (PS) 100 nm in diameter. In addition, a method of selectively trapping a PS of specific size is theoretically proposed via our design. We believe that our proposed FB nanocavity with a surface mode would provide enhanced features for on-chip optical sensors and tweezers. |
URI: | http://dx.doi.org/10.1109/JLT.2015.2474372 http://hdl.handle.net/11536/129579 |
ISSN: | 0733-8724 |
DOI: | 10.1109/JLT.2015.2474372 |
期刊: | JOURNAL OF LIGHTWAVE TECHNOLOGY |
Volume: | 33 |
Issue: | 21 |
起始頁: | 4445 |
結束頁: | 4449 |
顯示於類別: | 期刊論文 |