Comparative Analysis of a Planar Slotted Microdisk Resonator

• Published in: Journal of lightwave technology Vol. 27; no. 18; pp. 4009 - 4016
• Main Authors: Armaroli, A., Morand, A., Benech, P., Bellanca, G., Trillo, S.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 15.09.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Circuit properties; Confinement; Disks; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Figure of merit; Geometrical optics; Integrated optics; Integrated optics. Optical fibers and wave guides; Nonlinear optics; numerical methods; Optical and optoelectronic circuits; Optical filters; optical microresonators; Optical refraction; Optical resonators; Optical variables control; optical waveguide theory; Optical waveguides; Photonic crystals; Quality factor; Refractive index; Refractivity; Resonators; Ultraviolet sources; Wavelengths; whispering gallery modes; Integrated optics; numerical methods; Q factor; Geometrical parameter; Refraction index; Sandwich structure; Numerical method; Optical resonator; Optical waveguide theory; whispering gallery modes; Whispering gallery mode; optical microresonators; Slot resonator; Figure of merit; Planar technology
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2009.2021580

We analyze a microdisk resonator of sub-micrometer radius where confinement is obtained in a vertical sandwich characterized by a central slot of lower refractive index material. The properties of the antiguiding even modes characterized by TM fields peaked in the slot are analyzed with specific reference to the resonant wavelengths, the quality factor, the mode confinement properties, and the Purcell factor. It is shown, by means of a comparative analysis, that, for a small disk radius a full vectorial approach is required in order to properly account for the hybrid nature of the modes. This reflects on the dependence of such figures of merit upon geometrical parameters of the structure.