Optofluidic laser using photostable conjugated polymer (Conference Presentation)

Shuijing Tang; Zhihe Liu; Changfeng Wu; Qihuang Gong; Yun-Feng Xiao

doi:10.1117/12.2513506

13 March 2019 Optofluidic laser using photostable conjugated polymer (Conference Presentation)

Shuijing Tang, Zhihe Liu, Changfeng Wu, Qihuang Gong, Yun-Feng Xiao

Proceedings Volume 10904, Laser Resonators, Microresonators, and Beam Control XXI; 109040Y (2019) https://doi.org/10.1117/12.2513506
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Optofluidic laser, which incorporates optical cavities and luminescent probes in fluidic environments, has become a powerful platform for biosensing and medical diagnosis. To date, ﬂuorescent dyes and proteins have been widely utilized as gain materials for biological analysis due to their good biocompatibility, but the limited photostability restricts their reliability and sensitivity. Here, we bridge this gap by demonstrating an optofluidic microlaser using the biocompatible conjugated polymer. Assisted by the ultrahigh-Q whispering gallery microcavity, the optofluidic laser is achieved with an ultra-low threshold down to 7.8 μJ/cm^2. More importantly, this conjugated polymer exhibits a significant enhancement in the lasing stability compared with a typical laser dye (Nile red). In the experiment, after 20 minutes of illumination with the excitation intensity of 23.2 MW/cm^2, the lasing intensity of the conjugated polymer experiences a decrease of less than 10%, while the lasing feature of Nile red completely disappears. Additionally, by mechanically stretching the resonator, the lasing frequency can be fine-tuned with the range of about 2 nm, which exceeds a free spectral range of the resonator.

Conference Presentation

Citation Download Citation

Shuijing Tang, Zhihe Liu, Changfeng Wu, Qihuang Gong, and Yun-Feng Xiao "Optofluidic laser using photostable conjugated polymer (Conference Presentation)", Proc. SPIE 10904, Laser Resonators, Microresonators, and Beam Control XXI, 109040Y (13 March 2019); https://doi.org/10.1117/12.2513506

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available