Related Experiment Video
Updated: Mar 28, 2026
09:10
Fabrication and Testing of Microfluidic Optomechanical Oscillators
Published on: May 29, 2014
12.8K
Vertically coupled microresonators and oscillatory mode splitting in photonic molecules
Optics Express
|December 25, 2015
Summary
Researchers created a photonic molecule using coupled microdisk resonators. Mode splitting varied with resonator proximity, showing distinct behaviors in vertical versus horizontal arrangements due to light interference.
Area of Science:
- Photonics
- Optical physics
- Resonator coupling
Background:
- Microdisk resonators are fundamental components in integrated photonics.
- Coupling between resonators enables novel optical phenomena and device functionalities.
- Understanding coupling mechanisms is crucial for designing advanced photonic circuits.
Purpose of the Study:
- To investigate the formation and characteristics of a photonic molecule.
- To analyze the influence of relative resonator positions on coupling strength and mode splitting.
- To elucidate the underlying physics governing light coupling in vertically coupled microdisk systems.
Main Methods:
- Fabrication of vertically coupled microdisk resonators.
- Experimental manipulation of resonator positions (vertical and horizontal).
- Optical characterization of mode splitting phenomena.
- Development of a theoretical model based on coupled mode theory.
Main Results:
- Monotonous increase in mode splitting with decreasing vertical distance between resonators.
- Observation of oscillatory behavior in mode splitting with horizontal displacement at fixed vertical distance.
- Confirmation of light interference through multiple coupling regions as the cause of oscillatory behavior.
- Validation of experimental findings through a coupled mode theory model.
Conclusions:
- Successful formation of a photonic molecule via vertical coupling of microdisk resonators.
- Demonstrated distinct coupling behaviors based on the geometry of resonator arrangement.
- Identified light interference in multiple coupling regions as the key mechanism for oscillatory coupling.
- Provided a theoretical framework for understanding and predicting coupling dynamics in such systems.
Related Concept Videos
01:13¹H NMR: Complex Splitting
2.1K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
2.1K
01:12Double Resonance Techniques: Overview
850
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
850
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
01:08IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
2.2K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
2.2K
01:14Molecular Spectroscopy: Absorption and Emission
5.4K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
5.4K
03:51Molecular Orbital Theory II
28.4K
Molecular Orbital Energy Diagrams
28.4K