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Updated: May 11, 2026

Compact Quantum Dots for Single-molecule Imaging

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Published on: October 9, 2012

Stable, Efficient, and Scalable Multicolor Lasing from Colloidal Quantum Dots in Liquids.

Xueyang Li¹, Jun Du^1,2, Yuxi Jia^2,3

¹State Key Laboratory of Chemical Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China.

|July 22, 2025

Summary

This summary is machine-generated.

Colloidal quantum dots (QDs) enable stable liquid lasing in red, orange, and green hues. This breakthrough overcomes challenges in solid-state gain media, paving the way for practical optofluidic devices.

Keywords:

Auger recombination colloidal quantum dots liquid lasing multiexcitons optical gain

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Published on: May 31, 2018

Area of Science:

Materials Science
Optics
Nanotechnology

Background:

Liquid-state optical gain media offer advantages in heat management for high-power lasers and optofluidics.
Colloidal quantum dots (QDs) are promising for liquid lasing due to their solution processability.
Current QD lasing often requires close-packed films to overcome Auger decay, limiting liquid applications.

Purpose of the Study:

To demonstrate liquid lasing from colloidal quantum dots with suppressed Auger recombination.
To achieve color-tunable lasing (red, orange, green) in a liquid medium.
To assess the stability and scalability of QD-based liquid gain media.

Main Methods:

Development of alloyed core/shell quantum dots with impeded Auger recombination.
Loading QD solutions into optical cavities for quasi-continuous-wave excitation.
Characterization of light amplification and stability under ambient conditions.

Main Results:

Successful liquid lasing achieved from color-tunable colloidal QDs.
QD solutions exhibited superior stability compared to solid-state QD films and dye solutions.
Demonstrated compatibility with aqueous solvents and scalability, with an optimized optical power efficiency of 17.2%.

Conclusions:

Colloidal QDs with impeded Auger recombination enable efficient and stable liquid lasing.
These findings suggest a strong potential for practical implementation of QD-based liquid gain media.
The developed QD-solutions offer a promising alternative for high-power lasing and optofluidics.