Related Experiment Video
Updated: Aug 7, 2026
12:57
Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
Photonic crystal-assisted light extraction from a colloidal quantum dot/GaN hybrid structure
Frédéric S Diana1, Aurélien David, Ines Meinel
1Materials Department, Mitsubishi Chemical Center for Advanced Materials, University of California, Santa Barbara, California 93106, USA. frederic@engineering.ucsb.edu
Nano Letters
|June 15, 2006
Summary
We enhanced light extraction from quantum dot films using photonic crystals, achieving a 1.4x boost for quantum dot emission and efficient guided light extraction.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Colloidal quantum dots (CQDs) offer tunable optoelectronic properties.
- Efficient light extraction is crucial for optoelectronic device performance.
- Photonic crystals can control light propagation and emission.
Purpose of the Study:
- To investigate light extraction enhancement from CdSe/ZnS CQD films.
- To utilize InGaN/GaN photonic crystals for improved light extraction.
- To analyze the efficiency of guided light mode extraction.
Main Methods:
- Fabrication of 2D photonic crystals using nanoimprint lithography.
- Deposition of CdSe/ZnS core/shell CQD thin films.
- Characterization using far-field and microphotoluminescence spectroscopy.
Main Results:
- A 1.4x enhancement factor for quantum dot emission extraction.
- Efficient extraction of guided light modes from CQDs and quantum wells.
- Effective extraction lengths for guided modes ranged from 70 to 180 microm.
Conclusions:
- Photonic crystals significantly improve light extraction from CQD films.
- The study demonstrates a viable method for enhancing optoelectronic device efficiency.
- Wavelength-dependent extraction lengths highlight the tunability of the system.
