Related Experiment Video
Updated: Nov 17, 2025
10:40
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
7.8K
Ultra-high-Q resonances in plasmonic metasurfaces
M Saad Bin-Alam1, Orad Reshef2, Yaryna Mamchur1,3
1School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON, Canada.
Nature Communications
|February 13, 2021
Summary
Researchers developed a plasmonic metasurface using surface lattice resonances (SLRs) to overcome resistive losses. This breakthrough achieves a record high quality-factor (Q-factor), enabling efficient light manipulation for advanced optical devices.
Area of Science:
- Photonics and Nanotechnology
- Metasurface Optics
Background:
- Plasmonic nanostructures offer potential for ultra-thin, sub-wavelength optical devices with low operating thresholds and nonlinear optical properties.
- Significant resistive losses in plasmonic metasurfaces have limited their practical application, driving research towards alternative dielectric platforms.
- Existing plasmonic approaches often struggle with balancing field enhancement and energy loss.
Purpose of the Study:
- To investigate the potential of surface lattice resonances (SLRs) in plasmonic metasurfaces to overcome inherent loss limitations.
- To achieve a high quality-factor (Q-factor) plasmonic metasurface for enhanced optical performance.
- To explore the feasibility of SLRs for light field tailoring and the development of wavelength-scale optical devices.
Main Methods:
- Fabrication of a plasmonic metasurface designed to support surface lattice resonances (SLRs).
- Characterization of the metasurface's optical properties, focusing on resonance phenomena and quality-factor (Q-factor) measurements.
- Analysis of light-matter interactions, including field enhancement and confinement, within the SLR regime.
Main Results:
- Demonstrated a plasmonic metasurface exhibiting a record-breaking quality-factor (Q-factor) of 2340 in the telecommunication C band.
- Confirmed that SLRs provide significant field enhancement and strong light confinement, similar to localized plasmonic resonances.
- Showcased the effectiveness of SLRs in mitigating the detrimental effects of resistive losses.
Conclusions:
- Surface lattice resonances (SLRs) offer a viable pathway to high-performance plasmonic metasurfaces with significantly reduced losses.
- SLRs present a novel and underexplored approach for precise control over incident light fields.
- This work opens possibilities for flexible, wavelength-scale optical devices applicable to diverse resonant optical applications.
