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Updated: Oct 7, 2025
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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
Published on: May 28, 2016
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Fabrication of Efficient Single-Emitter Plasmonic Patch Antennas by Deterministic In Situ Optical Lithography using
Amit R Dhawan1,2,3, Michel Nasilowski4, Zhiming Wang1
1Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|January 8, 2022
Summary
Researchers developed a new method for precisely positioning plasmonic antennas on single quantum dots. This technique enhances single-photon emission for advanced quantum technologies.
Area of Science:
- Quantum Optics
- Materials Science
- Nanotechnology
Background:
- Single-emitter plasmonic patch antennas are promising room-temperature single-photon sources.
- Efficient operation requires precise 3D nanoscale control of emitter positioning, which is challenging and risks emitter damage.
Purpose of the Study:
- To develop a non-destructive method for deterministic positioning of plasmonic antennas on single emitters.
- To analyze the emission characteristics of quantum dots coupled to these precisely positioned antennas.
Main Methods:
- Utilized deterministic room-temperature in situ optical lithography with spatially modulated light.
- Nondestructively positioned plasmonic patch antennas on single colloidal CdSe/CdS quantum dots with 3D nanoscale control.
Main Results:
- Achieved a 1000-fold effective increase in the absorption cross-section of the quantum dot.
- Demonstrated accelerated and highly directed single-photon emission.
- Observed nonlinearly enhanced emission under high pumping conditions.
Conclusions:
- The in situ optical lithography protocol enables efficient, non-destructive coupling of plasmonic antennas to single emitters.
- This method significantly enhances single-photon source brightness and control, advancing quantum light applications.
