Liu Qing, Chiang Kin Seng
Department of Electronic Engineering, City University of Hong Kong, Hong Kong SAR, China.
Opt Express. 2010 Apr 26;18(9):8963-8. doi: 10.1364/OE.18.008963.
We propose a planar long-period grating filter based on coupling between the long-range surface plasmon mode and a cladding mode of a fully buried metal stripe waveguide. Using a 2.5-mm-long corrugation grating produced along the surface of an epoxy-clad aluminum stripe waveguide, we achieve a rejection band with a contrast of approximately 18 dB at the wavelength approximately 1500 nm, which can be tuned by approximately 25 nm with a temperature change of approximately 30 degrees C. The experimental results agree closely with the simulation results. The filter could find applications in surface-plasmon-based integrated-optic circuits and biosensors.
我们提出了一种基于长程表面等离子体激元模式与完全掩埋金属条纹波导包层模式之间耦合的平面长周期光栅滤波器。通过在环氧包覆铝条纹波导表面制作2.5毫米长的波纹光栅，我们在波长约1500纳米处实现了对比度约为18分贝的阻带，并且随着温度大约30摄氏度的变化，该阻带可被调谐约25纳米。实验结果与模拟结果非常吻合。该滤波器可应用于基于表面等离子体激元的集成光学电路和生物传感器中。
