Ultracompact silicon-on-insulator ridge-waveguide mirrors with high reflectance

Microcavities offering small modal volumes V_0.6 __/n_3 and consisting of two identical tapered Bragg mirrors etched into a monomode silicon-on-insulator ridge waveguide are studied for operation at telecommunications wavelengths. The authors have measured a Q factor of 8900, for a loaded cavity with a peak transmission at resonance in excess of 60%. The measured Q value quantitatively agrees with the calculation results and is 20 times larger than those previously reported for similar geometries without tapers.

[1]  Shanhui Fan,et al.  Photonic band gap airbridge microcavity resonances in GaAs/AlxOy waveguides , 2000 .

[2]  J P Hugonin,et al.  Use of grating theories in integrated optics. , 2001, Journal of the Optical Society of America. A, Optics, image science, and vision.

[3]  A. Taflove,et al.  Nanofabrication of 1-D photonic bandgap structures along a photonic wire , 1996, IEEE Photonics Technology Letters.

[4]  R Orobtchouk,et al.  Low-loss submicrometer silicon-on-insulator rib waveguides and corner mirrors. , 2003, Optics letters.

[5]  Lin Zhu,et al.  Transmission and group delay of microring coupled-resonator optical waveguides. , 2006, Optics letters.

[6]  P Lalanne,et al.  Modal-reflectivity enhancement by geometry tuning in Photonic Crystal microcavities. , 2005, Optics express.

[7]  Y. Vlasov,et al.  Losses in single-mode silicon-on-insulator strip waveguides and bends. , 2004, Optics express.

[8]  Qianfan Xu,et al.  Micrometre-scale silicon electro-optic modulator , 2005, Nature.

[9]  Mario Martinelli,et al.  Synthesis of direct-coupled-resonators bandpass filters for WDM systems , 2002 .

[10]  M. Kamp,et al.  Ultrahigh-quality photonic crystal cavity in GaAs. , 2006, Optics letters.

[11]  Yoshinori Tanaka,et al.  Investigation of point-defect cavity formed in two-dimensional photonic crystal slab with one-sided dielectric cladding , 2006 .

[12]  Richard M. De La Rue,et al.  One-dimensional periodic photonic crystal microcavity filters with transition mode-matching features, embedded in ridge waveguides , 2003 .

[13]  Philippe Lalanne,et al.  Bloch-wave engineering for high-Q, small-V microcavities , 2003 .