Acta Optica Sinica, Volume. 35, Issue 6, 623001(2015)
Filter Characteristic Research of MIM Waveguide Based on L Shaped Resonator
A metal-insulator-metal (MIM) waveguide with L-shaped resonator is designed. The transmission properties of this resonator are numerically investigated by finite element method. The results show that the transmission properties of the L- shaped resonator depend on the length and the height of it. L- shaped cavity has better quality factor and better filtering effect compared with the horizontal rectangular cavity with the same size as L- shaped cavity. With the increase of the size of L- shaped cavity, spectrum exhibits a red shift. Filling the medium of different refractive index in L- shaped cavity, the MIM waveguide with L- shaped resonator allows a much more sensitive detection of small refractive index changes of the filled media inside Lshaped nano-cavity. It is easy to detect the refractive index of medium by detecting resonant wavelength in the transmission spectra, which reveals a potential sensors of the MIM waveguide with L-shaped nano-cavity.
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Pang Shaofang, Qu Shixian, Zhang Yongyuan, Xie You, Hao Limei. Filter Characteristic Research of MIM Waveguide Based on L Shaped Resonator[J]. Acta Optica Sinica, 2015, 35(6): 623001
Category: Optical Devices
Received: Oct. 31, 2014
Accepted: --
Published Online: Apr. 20, 2015
The Author Email: Shaofang Pang (pangshaofang@126.com)