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SEPARATION OF RESONANCE MODES IN NANORING RESONATOR BY A CASCADED SLOT CAVITY

KEFENG SHANG

Center for Information Photonics and Communications, Southwest Jiaotong University, Chengdu 610031, China

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LIANSHAN YAN

Center for Information Photonics and Communications, Southwest Jiaotong University, Chengdu 610031, China

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KUNHUA WEN

Center for Information Photonics and Communications, Southwest Jiaotong University, Chengdu 610031, China

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ZHEN GUO

Center for Information Photonics and Communications, Southwest Jiaotong University, Chengdu 610031, China

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YINGHUI GUO

Center for Information Photonics and Communications, Southwest Jiaotong University, Chengdu 610031, China

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WEI PAN

Center for Information Photonics and Communications, Southwest Jiaotong University, Chengdu 610031, China

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, and

XIANGANG LUO

State Key Laboratory of Optical Technology for Microfabrication, Chinese Academy of Science, Chengdu 610029, China

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https://doi.org/10.1142/S0217984912501503Cited by:3 (Source: Crossref)

Abstract

A mode separation approach in the nanoring resonator by a cascaded slot cavity is proposed and numerically investigated using the finite-difference time-domain (FDTD) method. With the cascaded slot cavity, the specified modes in the nanoring can be separated to realize a wide free spectral range (FSR) or single channel filtering, which provides a free degree to the plasmonic filters design. Simulation results also demonstrate that the full-width at half-maximum (FWHM) of the single channel filter obtained from the cascaded slot cavity can be effectively reduced to meet various requirements.

Keywords:

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