Authors: Kunhua Wen Lianshan Yan Yihua Hu Li Chen Liang Lei
Publish Date: 2014/02/14
Volume: 9, Issue: 3, Pages: 685-690
Abstract
A subwavelength intersection structure with wavelength filtering functionality is proposed by using an open loop which consists of four slot cavities and four metalinsulatormetal MIM drop waveguides The slot cavities are used as the resonators while the MIM waveguides serve as the input/output ports The SPPs propagations and the transmission wavelengths in two pairs of matched input/output ports are immune to each other which satisfy the intersection characters The results based on finite difference time domain FDTD method demonstrate that high transmittance for the expected output port and high isolation for other ports have been achieved Specifically the transmittance and isolation is larger than 064 and 14 dB respectively In addition a transmission peak whose wavelength can be modulated by adjusting the length of the slot cavities is available for the output port Such a device can find applications in various optical systems such as the wavelength filtering area and the optical intersection area
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