Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu, Taiwan.
Opt Lett. 2011 Feb 1;36(3):424-6. doi: 10.1364/OL.36.000424.
We propose that a tapered photonic crystal waveguide design can unify optical trapping and transport functionalities to advance the controllability of optical manipulation. Subwavelength particles can be trapped by a resonance-enhanced field and transported to a specified position along the waveguide on demand by varying the input wavelength. A simulated transport ability as high as 148 (transport distance/wavelength variation) is obtained by the waveguide with 0.1° tilted angle. Stable trapping of a 50 nm polystyrene particle can be achieved with input power of 7 mW. We anticipate that this design would be beneficial for future life science research and optomechanical applications.
我们提出，锥形光子晶体波导设计可以将光俘获和传输功能统一起来，从而提高光操控的可控性。通过改变输入波长，可以利用共振增强场来俘获亚波长颗粒，并按需将其沿波导传输到指定位置。具有 0.1°倾斜角的波导可获得高达 148 的模拟传输能力（传输距离/波长变化）。通过输入功率为 7 mW 可以实现对 50nm 聚苯乙烯颗粒的稳定俘获。我们预计，这种设计将有益于未来的生命科学研究和光机械应用。
