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Large ordered arrays of single photon sources based on II-VI semiconductor colloidal quantum dot
Qiang Zhang1, Cuong Dang, Hayato Urabe
1Division of Engineering, Brown University, Providence, Rhode Island 02912, USA.
Optics Express
|November 26, 2008
Summary
We developed a novel method for precisely organizing tiny colloidal particles on surfaces. This technique creates highly ordered arrays of quantum dots for scalable quantum optical systems.
Area of Science:
- Nanotechnology and Materials Science
- Quantum Optics and Photonics
Background:
- Deterministic organization of colloidal particles is crucial for advanced nanophotonic applications.
- Existing methods often lack precision, scalability, or the ability to handle sub-10nm particles.
Purpose of the Study:
- To develop an efficient and deterministic method for organizing colloidal particles on structured surfaces.
- To demonstrate the capability of this method for creating ordered arrays of quantum dots for single photon emission.
Main Methods:
- Integrated solution-based processes involving dielectric encapsulation.
- Electrostatic-force-mediated self-assembly for precise particle placement at single-particle resolution.
- Fabrication of 2D arrays using II-VI semiconductor colloidal quantum dots (QDs).
Main Results:
- Achieved deterministic organization of sub-10nm colloidal particles over macroscopic areas.
- Successfully created highly ordered 2D arrays of colloidal quantum dots.
- Demonstrated triggered single photon emission at room temperature from individual QDs with photon antibunching.
Conclusions:
- The developed method enables precise, scalable control over colloidal particle assembly.
- The fabricated quantum dot arrays show potential for scalable quantum optical radiative systems.
- This work provides a pathway towards practical quantum light sources.
