[1] [1] E. A. J. Marcatili. Bends in optical dielectric guides［J］. The Bell System Technical Journal, 1969, 48(7): 2103～2132

[2] [2] B. E. Little, S. Foresi, G. Steinmeyer et al.. Ultra-compact Si-SiO2 microring resonator optical channel dropping filters［J］. IEEE Photon. Technol. Lett., 1998, 10(4): 549～551

[3] [3] B. E. Little, S. T. Chu, H. A. Haus et al.. Microring resonator channel dropping filters［J］. J. Lightwave Technol., 1997, 15(6): 998～1005

[4] [4] V. Van, T. A. Ibrahim, K. Ritter et al.. All-optical nonlinear switching in GaAs-AlGaAs microring resonators［J］. IEEE Photon. Technol. Lett., 2002, 14(1): 74～76

[5] [5] Qianfan Xu, Bradley Schmidt, Sameer Pradhan et al.. Micrometre-scale silicon electro-optic modulator［J］. Nature, 2005, 435(7040): 325～327

[6] [6] R. Polson, G. Levina, Z. Vardeny. Spectral analysis of polymer microring lasers［J］. Appl. Phys. Lett., 2000, 76(26): 3858～3860

[7] [7] Han Xiuyou, Song Hongyan, Zhang Jianing et al.. Study on the integrated waveguide optical delay line based on microring resonators ［J］. Acta Optica Sinica, 2010, 30(3): 782～786

[8] [8] Zhang Jianing, Han Xiuyou, Song Hongyan et al.. Study on time delay characteristics of integrated waveguide microring resonator with tunable coupler ［J］. Acta Optica Sinica, 2010, 30(7): 2098～2103

[9] [9] Han Xiuyou, Zhang Jianing, Song Hongyan et al.. Influence of coupling conditions on time delay line characteristics of integrated waveguide microring resonators ［J］. Acta Optica Sinica, 2011, 31(6): 0613001

[10] [10] K. Djordjev, S. J. Choi, P. Dapkus. Study of the effects of the geometry on the performance of vertically coupled InP microdisk resonators［J］. J. Lightwave Technol., 2002, 20(8): 1485～1492

[11] [11] D. V. Tishinin, P. D. Dapkus, A. E. Bond et al.. Vertical resonant couplers with precise coupling efficiency control fabricated by wafer bonding［J］. IEEE Photon. Technol. Lett., 1999, 11(8): 1003～1005

[12] [12] Y. Kokubun. High index contrast optical waveguides and their applications to microring filter circuit and wavelength selective switch［J］. IEICE Trans. Electron. E Series C, 2007, 90(5): 1037～1045

[13] [13] Xin Yan, Ma Chunsheng, Xu Yuanzhe et al.. Characteristics of vertical bent coupling between straight and curved rectangular optical waveguides［J］. Optik, 2005, 116(8): 397～403

[14] [14] Dimitris Alexandropoulos, Hercules Simos, Mihai Kusko et al.. Microring resonators with enhanced tolerance to fabrication misalignments［J］. J. Opt. A- Pure Appl. Opt., 2009, 11(12): 125401

[15] [15] M. Kusko, A. Kapsalis, C. Kusko et al.. Design of single-mode vertically coupled microring resonators［J］. J. Opt. A- Pure Appl. Opt., 2008, 10(6): 064012

[16] [16] T. Kato, Y. Kokubun. Three-dimensional propagation analysis of coupling efficiency using segmentation and local normal mode expansion for vertically coupled microring resonator filter［J］. J. Lightwave Technol., 2005, 23(8): 2549～2554

[17] [17] P. P. Absil, J. V. Hryniewicz, B. E. Little et al.. Vertically coupled microring resonators using polymer wafer bonding［J］. IEEE Photon. Technol. Lett., 2001, 13(1): 49～51

[18] [18] B. E. Little, S. T. Chu. Toward very large-scale integrated photonics［J］. Opt. & Photon. News, 2000, 11(11): 24～29

[19] [19] B. Rahman, J. Davies. Finite-element solution of integrated optical waveguides［J］. J. Lightwave Technol., 1984, 2(5): 682～688

[20] [20] Ma Chunsheng, Liu Shiyong. Theory of Optical Waveguide Mode［M］. Changchun: Jilin University Press, 2006. 329～334

[21] [21] E. A. J. Marcatili. Dielectric rectangular waveguide and directional coupler for integrated optics［J］. The Bell Systems Technical Journal, 1969, 48(21): 2071～2102

[22] [22] G. H. Wang, P. Shum, G. B. Ren et al.. Theoretical investigation of nanowaveguide based optical coupler using mode expansion transfer matrix［J］. Microwave and Opt. Technol. Lett., 2010, 52(5): 1123～1129

[23] [23] Ma Chunsheng, Xin Yan, Xu Yuanzhe et al.. Characteristic analysis of bending coupling between two optical waveguides［J］. Opt. & Quantum Electron., 2005, 37(11): 1055～1067

[24] [24] Vilson R. Almeida, Qianfan Xu, Carlos A. Barrios et al.. Guiding and confining light in void nanostructure［J］. Opt. Lett., 2004, 29(11): 1209～1211