Related Experiment Video
Updated: Mar 6, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
17.6K
Efficient frequency generation in phoXonic cavities based on hollow whispering gallery mode resonators
Daniele Farnesi1,2, Giancarlo Righini1,2, Gualtiero Nunzi Conti1
1CNR-IFAC- Institute of Applied Physics, Sesto Fiorentino, 50019, Italy.
Scientific Reports
|March 8, 2017
Summary
Researchers explored nonlinear optical effects in hollow phoxonic cavities. They observed multiple stimulated scattering and Kerr effects simultaneously, highlighting the rich nonlinear dynamics in these unique resonators.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Whispering gallery mode resonators are crucial for light confinement.
- Nonlinear optical phenomena are essential for advanced photonic devices.
- Hollow resonators offer unique modal properties for nonlinear optics.
Purpose of the Study:
- To investigate nonlinear optical effects in hollow whispering gallery mode resonators.
- To explore the interplay of various nonlinear phenomena within these cavities.
- To understand the role of multiple mode families in nonlinear optical processes.
Main Methods:
- Utilizing a continuous wave laser to pump hollow phoxonic cavities.
- Observing and analyzing stimulated scattering (Brillouin, Raman) and Kerr effects (four-wave mixing).
- Characterizing dispersive wave generation and concomitant nonlinear processes.
Main Results:
- Concomitant observation of Brillouin and Raman scattering.
- Demonstration of both degenerated and non-degenerated four-wave mixing.
- Evidence of dispersive wave generation within the hollow resonator.
- Rich nonlinear optical scenario arising from coexisting mode families.
Conclusions:
- Hollow whispering gallery mode resonators exhibit a diverse range of nonlinear optical effects.
- The coexistence of multiple mode families significantly enhances the nonlinear dynamics.
- These findings pave the way for novel applications in nonlinear photonics.
Related Concept Videos
01:28Standing Waves in a Cavity
1.6K
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:
1.6K
01:14Sound Waves: Resonance
3.6K
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...
3.6K
01:24Characteristics of Series Resonant Circuit
732
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:
732
01:17Design Example: Underdamped Parallel RLC Circuit
716
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
Starting with a fixed...
716
01:10Generating Electromagnetic Radiations
7.9K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
7.9K
01:23Parallel Resonance
682
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:
682