Related Experiment Video
Updated: Jun 22, 2025
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
18.9K
Twisted lattice nanocavity with theoretical quality factor exceeding 200 billion
Ren-Min Ma1,2,3,4, Hong-Yi Luan1, Zi-Wei Zhao1
1State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics, School of Physics, Peking University, Beijing 100871, China.
Fundamental Research
|June 27, 2024
Summary
Researchers discovered novel twisted lattice nanocavities for unprecedented light localization. These cavities achieve record-breaking quality factors, enabling new frontiers in fundamental physics and advanced optical applications.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
Background:
- Simultaneous spatial and spectral light localization is crucial for fundamental physics and applications.
- A persistent trade-off has limited achieving extreme localization in both space and frequency.
Purpose of the Study:
- To overcome the space-frequency localization trade-off.
- To introduce a new class of optical cavities for enhanced light localization.
Main Methods:
- Discovery of twisted lattice nanocavities.
- Utilizing mode locking in momentum space.
- Fabrication of silicon-based nanocavities.
Main Results:
- Achieved a record mode volume of 0.048 λ³.
- Demonstrated a quality factor exceeding 2.9 × 10¹¹ (250 μs photon lifetime).
- Developed silicon-based nanocavities with quality factors over 1 million.
Conclusions:
- The twisted lattice nanocavity offers a record figure of merit for light localization.
- This provides a powerful platform for studying light-matter interactions under extreme conditions.
- Enables advancements in nanolasing, ultrasensing, nonlinear optics, optomechanics, and quantum-optical devices.
Related Concept Videos
01:28Standing Waves in a Cavity
903
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:
903
01:19Equivalent Capacitance
1.4K
Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
The following strategies are adopted to calculate...
1.4K