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Title: Bioresponsive microlasers with tunable lasing wavelength
Authors: Yuan, Zhiyi
Tan, Xiaotian
Gong, Xuerui
Gong, Chaoyang
Cheng, Xin
Feng, Shilun
Fan, Xudong
Chen, Yu-Cheng
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Yuan, Z., Tan, X., Gong, X., Gong, C., Cheng, X., Feng, S., Fan, X. & Chen, Y. (2021). Bioresponsive microlasers with tunable lasing wavelength. Nanoscale, 13(3), 1608-1615.
Project: A20E5c0085
NAP SUG-M4082308.040
Journal: Nanoscale
Abstract: Lasing particles are emerging tools for amplifying light-matter interactions at the biointerface by exploiting its strong intensity and miniaturized size. Recent advances in implementing laser particles into living cells and tissues have opened a new frontier in biological imaging, monitoring, and tracking. Despite remarkable progress in micro- and nanolasers, lasing particles with surface functionality remain challenging due to the low mode-volume while maintaining a high Q-factor. Herein, we report the novel concept of bioresponsive microlasers by exploiting interfacial energy transfer based on whispering-gallery-mode (WGM) microdroplet cavities. Lasing wavelengths were manipulated by energy transfer-induced changes of a gain spectrum resulting from the binding molecular concentrations at the cavity surface. Both protein-based and enzymatic-based interactions were demonstrated, shedding light on the development of functional microlasers. Finally, tunable lasing wavelengths over a broad spectral range were achieved by selecting different donor/acceptor pairs. This study not only opens new avenues for biodetection, but also provides deep insights into how molecules modulate laser light at the biointerface, laying the foundation for the development of smart bio-photonic devices at the molecular level.
ISSN: 2040-3364
DOI: 10.1039/D0NR07921A
Schools: School of Electrical and Electronic Engineering 
School of Chemical and Biomedical Engineering 
Rights: © 2021 The Royal Society of Chemistry. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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