Related Experiment Video
Updated: Apr 7, 2026
12:21
Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
Published on: April 4, 2016
11.8K
Spectral engineering with coupled microcavities: active control of resonant mode-splitting
Optics Letters
|July 16, 2015
Summary
Researchers developed a new method for tunable optical mode-splitting in nanophotonic devices. This technique allows for wide splitting adjustments while minimizing unwanted resonance shifts, offering precise spectral control.
Area of Science:
- Photonics
- Nanotechnology
- Optical Engineering
Background:
- Optical mode-splitting is crucial for tuning nanophotonic devices.
- Existing methods offer limited control or cause significant resonance shifts.
Purpose of the Study:
- To develop a reconfigurable and widely tunable optical mode-splitting mechanism.
- To mitigate undesired resonance shifts during active control.
Main Methods:
- Actively controlling the excitation of counter-traveling modes in coupled resonators.
- Utilizing low-power microheaters for dynamic adjustments.
Main Results:
- Demonstrated a transition from 80 GHz splitting to a single-notch resonance.
- Achieved tunable mode-splitting with minimal resonance shifts, limited primarily by thermal crosstalk.
Conclusions:
- The proposed control mechanism enables efficient and reconfigurable mode-splitting.
- Resonance-shift-free splitting control is potentially achievable, overcoming current limitations.
Related Concept Videos
01:28Standing Waves in a Cavity
1.7K
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:
1.7K
01:08IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
2.3K
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...
2.3K
01:12Double Resonance Techniques: Overview
853
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...
853
01:14Sound Waves: Resonance
3.7K
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...
3.7K
02:16Resonance and Hybrid Structures
29.1K
According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
29.1K
01:23Parallel Resonance
746
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:
746