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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Nonlocal metasurface for dark-field edge emission
Jin Yao1, Wei-Lun Hsu2, Yao Liang1
1Department of Electrical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China.
Science Advances
|April 17, 2024
Summary
Researchers demonstrated a nonlocal metasurface for spatial modulation of dark-field emission. This new method offers flexible, pixel-level control by manipulating interactions between meta-atoms, enabling advanced nanoscale applications.
Area of Science:
- Metasurface optics
- Plasmonics
- Nanophotonics
Background:
- Nonlocal effects in metasurfaces arise from inter-meta-atom interactions, offering unique control over light.
- Manipulating these collective responses is challenging for device applications.
- Spatial modulation of optical emission is crucial for advanced photonic devices.
Purpose of the Study:
- To experimentally demonstrate a nonlocal metasurface for spatial modulation of dark-field emission.
- To leverage nonlocal effects for enhanced control over light-matter interactions.
- To enable flexible, pixel-level spatial control of optical properties.
Main Methods:
- Designed plasmonic asymmetric split rings (ASRs) to excite multiple resonance modes.
- Tailored nonlocal effects by varying array periods of ASR units.
- Demonstrated spatial control by selectively removing ASR units from the metasurface.
Main Results:
- Achieved spatial modulation of dark-field emission using the nonlocal metasurface.
- Observed enhanced dark-field scattering at the metasurface edge due to limited interactions.
- Demonstrated pixel-level control by pattern-wise erasure of meta-atoms.
Conclusions:
- Nonlocal metasurfaces offer a new paradigm for manipulating light-matter interactions.
- The demonstrated technique provides flexible spatial control over optical emission.
- This work facilitates applications in nanoscale optical trapping and sorting.
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