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Silicon Quantum Dot-Polymer Fabry-Pérot Resonators with Narrowed and Tunable Emissions
I Teng Cheong1, William Morrish2, William Sheard1
1Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
ACS Applied Materials & Interfaces
|May 13, 2021
Summary
Silicon quantum dots (SiQDs) offer a biocompatible alternative for optoelectronics. This study demonstrates a novel Fabry-Pérot resonator that narrows SiQD emission bandwidth by 14-fold, achieving 9 nm spectral purity.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Silicon quantum dots (SiQDs) are promising alternatives to metal-based quantum dots due to silicon's abundance and biocompatibility.
- Broad photoluminescence line widths (>100 nm) of SiQDs hinder spectral purity and device integration.
Purpose of the Study:
- To develop a method for narrowing the photoluminescence bandwidth of silicon quantum dots.
- To create spectrally pure and tunable light-emitting devices using SiQDs.
Main Methods:
- Fabrication of Fabry-Pérot resonators with a SiQD-polymer hybrid layer sandwiched between silver mirrors.
- Testing the optical properties and spectral characteristics of the fabricated resonators.
Main Results:
- Achieved up to a 14-fold reduction in SiQD emission line width.
- Demonstrated spectral bandwidths as narrow as approximately 9 nm.
- Showcased convenient spectral tunability and compatibility with various polymer hosts and substrates.
Conclusions:
- Fabry-Pérot resonators offer a straightforward and effective approach to enhance the spectral purity of SiQD emission.
- These polymer-based resonators enable the development of rigid and flexible optoelectronic devices with improved performance.
