Related Experiment Video
Updated: Jul 16, 2025
07:51
Fabrication of Silica Ultra High Quality Factor Microresonators
Published on: July 2, 2012
16.5K
Fano resonance in a microring resonator with a micro-reflective unit
Optics Express
|September 15, 2023
Summary
This study introduces a theoretical model to control Fano resonance lineshapes on chips using micro-reflective units (MRUs) in microring resonators (MRRs). This breakthrough enables highly sensitive integrated sensing for silicon photonic devices.
Area of Science:
- Photonics
- Integrated Optics
- Nanophotonics
Background:
- Fano resonance offers potential for integrated sensing applications.
- Controlling Fano resonance lineshapes on compact chips presents a significant challenge.
Purpose of the Study:
- To propose a theoretical model for controlling Fano resonance lineshapes.
- To investigate the impact of micro-reflective units (MRUs) on Fano resonance in microring resonators (MRRs).
- To demonstrate a new approach for high-sensitivity integrated sensing using silicon photonic devices.
Main Methods:
- Utilized the transfer matrix method (TMM) to develop a theoretical model.
- Performed numerical calculations and Finite-Difference Time-Domain (FDTD) simulations.
- Employed scattering matrix formalism for single nanoparticle sensing analysis.
Main Results:
- The size and position of MRUs effectively control Fano resonance lineshapes.
- MRUs enhance the intensity of counter-clockwise (CCW) modes in MRRs.
- The model accurately predicts Fano lineshape shifts and splits caused by nanoparticle interaction, matching FDTD simulations.
Conclusions:
- The proposed theoretical model provides a new basis for controlling Fano resonance.
- This work presents an advanced approach for sensitive integrated sensing in silicon photonics.
- The findings pave the way for developing novel on-chip sensing devices.
Related Concept Videos
01:23Parallel Resonance
229
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:
229
01:14Sound Waves: Resonance
2.6K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
2.6K
01:24Characteristics of Series Resonant Circuit
278
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:
278
01:17Series Resonance
201
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
201
01:26Resonance in an AC Circuit
2.1K
The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...
2.1K
01:28Standing Waves in a Cavity
955
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
955