title: A tunable submicro-optofluidic polymer filter based on guided-mode resonance.
abstract: Optical filters with reconfigurable spectral properties are highly desirable in a wide range of applications. We propose and experimentally demonstrate a tunable submicro-optofluidic polymer guided-mode resonance (PGMR) filter. The device is composed of a periodic grating sandwiched between a high index waveguide layer and a low index capping layer, which integrates submicro-fluidic channel arrays and a PGMR filter elegantly. A finite difference time domain (FDTD) method is employed to understand the spectral properties and determine appropriate device parameters. We fabricated the polymer guided-mode resonance filter with a method combining two-beam interference lithography, floating nanofilm transfer and thermal bonding techniques. Experimental results show that our tunable submicro-optofluidic PGMR filters can provide a broad spectral tuning range (13.181 nm), a narrow bandwidth (<2.504 nm), and a high reflection efficiency (>85%) in the visible region. Such submicro-optofluidic PGMR filters are highly compatible with existing nano/microfluidic technologies and would be valuable for the integrated flexible optical system.
authors: State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China. jinchjun@mail.sysu.edu.cn.
authors: Guohui
authors: G
authors: Xiao
authors: Qiangzhong
authors: Q
authors: Zhu
authors: Yang
authors: Y
authors: Shen
authors: Kezheng
authors: K
authors: Li
authors: Mingkai
authors: M
authors: Liu
authors: Qiandong
authors: Q
authors: Zhuang
authors: Chongjun
authors: C
authors: Jin