Related Experiment Video
Updated: May 5, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
16.4K
Practically reliable high-Q guided-mode resonances via coupler-assisted BICs.
Optics Express
|May 4, 2026
Summary
Researchers developed a robust metasurface design for high-quality (Q) factor photonic quasi-bound states in the continuum (quasi-BICs). This innovation enhances resilience to fabrication imperfections, paving the way for reliable photonic devices.
Area of Science:
- Photonics
- Metamaterials
- Optical Engineering
Background:
- Photonic quasi-bound states in the continuum (quasi-BICs) enable high-quality (Q) factors but are sensitive to structural variations.
- Fabrication imperfections significantly degrade the performance of traditional quasi-BICs.
Purpose of the Study:
- To propose a novel metasurface design that overcomes the sensitivity of quasi-BICs to structural variations.
- To achieve exceptionally high Q-factors in quasi-BICs that are resilient to fabrication imperfections.
Main Methods:
- Introduced additional cylindrical dielectric couplers into a metasurface.
- Strategically repositioned smaller couplers to perturb the system and excite a guided-mode resonance.
Main Results:
- Achieved a Q-factor three orders of magnitude higher than conventional symmetry-perturbation methods.
- Demonstrated a significant improvement in Q-factor stability despite structural variations.
Conclusions:
- The proposed metasurface design offers a practical solution for creating reliable high-Q resonances.
- This approach enhances the robustness of photonic devices against manufacturing tolerances for classical and quantum applications.
Related Concept Videos
01:12Double Resonance Techniques: Overview
870
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...
870
01:24Characteristics of Series Resonant Circuit
904
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:
904
01:04¹³C NMR: ¹H–¹³C Decoupling
1.7K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.7K
01:23Parallel Resonance
856
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:
856
01:28Induced Electric Dipoles
4.0K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.0K
01:30Oscillations In An LC Circuit
2.7K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
2.7K