1.Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA
2.State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, 100871 Beijing, China
3.Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, USA
Yun-Feng Xiao yfxiao@pku.edu.cn
SeokHyun Yun (syun@hms.harvard.edu)
纸质出版日期:2021,
网络出版日期:2021-01-25,
收稿日期:2020-08-13,
修回日期:2021-01-05,
录用日期:2021-01-06
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Laser particles with omnidirectional emission for cell tracking[J]. LSA, 2021,10(2):197-207.
Tang, S. J. et al. Laser particles with omnidirectional emission for cell tracking. Light: Science & Applications, 10, 197-207 (2021).
Laser particles with omnidirectional emission for cell tracking[J]. LSA, 2021,10(2):197-207. DOI: 10.1038/s41377-021-00466-0.
Tang, S. J. et al. Laser particles with omnidirectional emission for cell tracking. Light: Science & Applications, 10, 197-207 (2021). DOI: 10.1038/s41377-021-00466-0.
The ability to track individual cells in space over time is crucial to analyzing heterogeneous cell populations. Recently
microlaser particles have emerged as unique optical probes for massively multiplexed single-cell tagging. However
the microlaser far-field emission is inherently direction-dependent
which causes strong intensity fluctuations when the orientation of the particle varies randomly inside cells. Here
we demonstrate a general solution based on the incorporation of nanoscale light scatterers into microlasers. Two schemes are developed by introducing either boundary defects or a scattering layer into microdisk lasers. The resulting laser output is omnidirectional
with the minimum-to-maximum ratio of the angle-dependent intensity improving from 0.007 (−24 dB) to > 0.23 (−6 dB). After transfer into live cells in vitro
the omnidirectional laser particles within moving cells could be tracked continuously with high signal-to-noise ratios for 2 h
while conventional microlasers exhibited frequent signal loss causing tracking failure.
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