[1] Sumetsky M.Optimization of optical ring resonator devices for sensing applications[J]. Opt. Lett., 2007, 32(17): 2577.

[2] Sumetsky M.Optimization of resonant optical sensors[J]. Opt. Express, 2007, 15(25): 17449.

[3] Chao C Y,Guo L J. Design and optimization of microring resonators in biochemical sensing applications[J]. J. Lightwave Technol., 2006, 24(3): 1395.

[4] Yi Huaxiang,Citrin D S, Chen Yao, et al. Dual-microring-resonator interference sensor[J]. Appl. Phys. Lett., 2009, 95: 191112.

[5] Claes T,Bogaerts W, Bienstman P. Vernier-cascade label-free biosensor with integrated arrayed waveguide grating for wavelength interrogation with low-cost broadband source[J]. Opt. Lett., 2011, 36(17): 3320.

[6] Claes T,Bogaerts W, Bienstman P. Experimental characterization of a silicon photonic biosensor consisting of two cascaded ring resonators based on the Vernier-effect and introduction of a curve fitting method for an improved detection limit[J]. Opt. Express, 2010, 18(22): 22747.

[7] Jin L,Li Mingyu, He Jianjun. Optical waveguide double-ring sensor using intensity interrogation with a low-cost broadband source[J]. Opt. Lett., 2011, 36(7): 1128.

[8] Joyce K S P,Scheuer J, Mookherjea S, et al. Matrix analysis of microring coupled-resonator optical waveguides[J]. Opt. Express, 2004, 12(1): 90.

[9] Katrien D V,Bartolozzi I, Schacht E, et al. Silicon-on-insulator microring resonator for sensitive and label-free biosensing[J]. Opt. Express, 2007, 15(12): 7610.

[10] Passaro V M N,Magno F. Investigation of thermo-optic effect and multireflector tunable filter/multiplexer in SOI waveguides[J]. Opt. Express, 2005, 13(9): 3429.