Related Experiment Video
Updated: Aug 6, 2026
08:17
Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale
Published on: May 25, 2016
Efficient lasing in size-tunable self-assembled organic microcavities
Lulu Xue1,2,3, Hongyan Shi4, Jiafan Qu1,2,3
1Institute of Modern Optics, School of Physics, Harbin Institute of Technology Harbin 150001 China gaobo@hit.edu.cn.
Chemical Science
|August 5, 2026
Summary
Researchers developed regular hexagonal microcavities from organic semiconductor p-MSB for efficient blue-emitting microlasers. This advancement improves optical confinement and lasing performance in organic microcavities.
Area of Science:
- Materials Science
- Optoelectronics
- Organic Electronics
Background:
- Organic semiconductor microcavities are promising for low-threshold, narrow-linewidth microlasers.
- Controllable fabrication of high-quality organic microcavities remains a significant challenge.
- 1,4-bis(4-methylstyryl)benzene (p-MSB) is an accessible organic gain material that self-assembles into microcavities with good amplified spontaneous emission (ASE) properties.
Purpose of the Study:
- To overcome limitations of elongated hexagonal geometries in self-assembled p-MSB microcavities.
- To achieve high-quality, regular hexagonal microcavities for enhanced lasing performance.
- To demonstrate size-tunable organic microcavities for optical circuits and optoelectronic devices.
Main Methods:
- Regulating the solution atmosphere during self-assembled crystal growth of p-MSB.
- Adjusting p-MSB concentration to obtain regular hexagonal microcavities (regular-PHMs).
- Characterizing the optical and lasing properties of the fabricated microcavities.
Main Results:
- High-quality p-MSB hexagonal microcavities with nearly identical side lengths were successfully fabricated.
- Regular-PHMs exhibited suppressed optical mode leakage, enabling efficient lasing.
- Achieved a low optical pumping threshold (~4.12 µJ cm⁻²), narrow linewidth (0.2 nm), and high quality factor (~2283).
- Demonstrated single-mode lasing by reducing the size of regular-PHMs.
Conclusions:
- The geometry and size of organic microcavities can be precisely controlled through crystal preparation.
- Regular hexagonal microcavity geometry is crucial for suppressing optical leakage and enhancing lasing properties.
- Size-tunable organic microcavities offer a promising platform for next-generation miniaturized optoelectronic devices and optical circuits.
