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Published on: November 30, 2012
Photonic crystal ring resonators: characteristics and applications
Zexuan Qiang1, Richard A Soref, Weidong Zhou
1Department of Electrical Engineering, NanoFAB Center University of Texas at Arlington, Arlington, TX 76019-0072, USA.
Journal of Nanoscience and Nanotechnology
|April 2, 2010
Summary
Photonic crystal ring resonators (PCRRs) offer a promising alternative to micro ring resonators for low-power nanophotonics. Unlike traditional resonators, PCRRs exhibit no size-dependent loss, enabling ultra-compact designs.
Area of Science:
- Photonics and Nanophotonics
- Optical Resonators
- Integrated Optics
Background:
- Micro ring resonators are fundamental components in nanophotonic technology.
- Traditional resonators face limitations with increasing miniaturization, particularly concerning size-dependent loss.
- Emerging low-power nanophotonic technologies require advanced resonator designs.
Purpose of the Study:
- To comprehensively investigate the characteristics and applications of photonic crystal ring resonators (PCRRs).
- To evaluate PCRRs as a potential alternative to traditional micro ring resonators.
- To analyze the performance of PCRRs concerning key parameters like loss, quality factor, and free spectral range.
Main Methods:
- Numerical analysis was employed to study PCRR properties.
- The theory of mode superposition was applied to understand resonator behavior.
- Key characteristics including diameter-dependent loss, quality factor (Q), and free spectral range (FSR) were investigated.
Main Results:
- Photonic crystal ring resonators (PCRRs) demonstrated no size-dependent loss.
- This contrasts with micro-strip resonators, which exhibit approximately 1/D dependent loss.
- Key characteristics such as diameter (D)-dependent loss, quality factor (Q), and free spectral range (FSR) were analyzed.
Conclusions:
- PCRRs present a viable alternative to traditional micro ring resonators.
- The absence of size-dependent loss makes PCRRs suitable for ultra-compact ring resonator applications.
- PCRRs are a key contributor to the advancement of low-power nanophotonic technology.
Related Concept Videos
01:24Characteristics of Series Resonant Circuit
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
01:23Parallel Resonance
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by: