Photonic microring resonator modulated resonance response analysis Law Foo Kui 1 • M. Rakib Uddin 1 Received: 3 June 2017 / Accepted: 20 July 2017 Ó Springer Science+Business Media, LLC 2017 Abstract This paper presents the resonance response analysis of a photonic microring resonator. It covers the mathematical as well as simulation analysis on the modulated signals. The mathematical formulation provides a relation of several microring resonator parameters that could potentially affect the ring resonator performances. The simulation shows a graphical representation of the ring resonator full-width at half-max, quality factor (Q-factor) as well as the depth of the resonance at different modulation voltages applied to the ring. Several parameters have also been altered which is the ring radius, the coupling coefficient of the waveguides as well as the waveguide material group index. With this investigation, we determine the possible cause of the change in Q factor of a silicon microring resonator when the resonance is modulated and the possible solution to mini- mize the problem. Keywords Nanophotonics  Microring resonator  Resonance analysis 1 Introduction The photonic microring resonator has become one of the main research devices around the world. Its application spreads from providing a higher order optical filters by cascading the ring modulators (tunable microring resonators via input voltage variations) in series (Ilchenko and Matsko 2006; Rabus et al. 2002; Melloni et al. 2003), it is also used in biosensing to characterize a variety of absorption spectra for the purpose of chemical identification (Blair and Chen 2001; De Vos et al. 2007; Ksendzov and Lin 2005). & M. Rakib Uddin rakib.uddin@utb.edu.bn Law Foo Kui lawfk.1990@gmail.com 1 Electrical and Electronic Engineering Programme Area, Faculty of Engineering, Universiti Teknologi Brunei (UTB), Gadong, Brunei Darussalam 123 Opt Quant Electron (2017)49:275 DOI 10.1007/s11082-017-1113-5