Related Experiment Video
Updated: Dec 10, 2025
08:48
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
7.9K
Dual-color plasmonic random lasers for speckle-free imaging
Junhua Tong1, Xiaoyu Shi1, Lianze Niu1
1Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, People's Republic of China.
Nanotechnology
|August 27, 2020
Summary
Researchers developed a dual-color plasmonic random laser using quantum dots and gold nanorods. This single-excitation source enables tunable green and red lasing for advanced illumination and imaging applications.
Area of Science:
- Photonics and Nanomaterials Science
Background:
- Plasmonic random lasers offer unique light emission properties.
- Controlling dual-color emission in random lasers remains a challenge.
Purpose of the Study:
- To achieve dual-color random lasing under single excitation.
- To investigate the role of gold nanorods in tuning quantum dot emission.
- To demonstrate speckle-free color imaging using the developed laser source.
Main Methods:
- Fabrication of an ultrathin membrane doped with binary quantum dots and gold nanorods.
- Utilizing single-excitation to induce random lasing.
- Analyzing the effects of gold nanorod surface plasmon resonance on emission properties.
Main Results:
- Successful demonstration of dual-color (green and red) random lasing at low thresholds.
- Gold nanorods enhanced quantum dot emission efficiency and tuned luminescence lifetime.
- Transversal and longitudinal surface plasmon resonance of gold nanorods selectively controlled green and red lasing.
- Speckle-free color imaging was achieved using the dual-color random laser.
Conclusions:
- The proposed dual-color plasmonic random laser provides a novel approach for tunable light emission.
- The integration of gold nanorods offers effective control over random laser characteristics.
- This technology has significant potential for applications in illumination and advanced imaging systems.
