Jump to main content
Jump to site search

Issue 12, 2016
Previous Article Next Article

Optofluidic chlorophyll lasers

Author affiliations

Abstract

Chlorophylls are essential for photosynthesis and also one of the most abundant pigments on earth. Using an optofluidic ring resonator of extremely high Q-factors (>107), we investigated the unique characteristics and underlying mechanism of chlorophyll lasers. Chlorophyll lasers with dual lasing bands at 680 nm and 730 nm were observed for the first time in isolated chlorophyll a (Chla). Particularly, a laser at the 730 nm band was realized in 0.1 mM Chla with a lasing threshold of only 8 μJ mm−2. Additionally, we observed lasing competition between the two lasing bands. The presence of laser emission at the 680 nm band can lead to quenching or significant reduction of laser emission at the 730 nm band, effectively increasing the lasing threshold for the 730 nm band. Further concentration-dependent studies, along with theoretical analysis, elucidated the mechanism that determines when and why the laser emission band appears at one of the two bands, or concomitantly at both bands. Finally, Chla was exploited as the donor in fluorescence resonance energy transfer to extend the laser emission to the near infrared regime with an unprecedented wavelength shift as large as 380 nm. Our work will open a door to the development of novel biocompatible and biodegradable chlorophyll-based lasers for various applications such as miniaturized tunable coherent light sources and in vitro/in vivo biosensing. It will also provide important insight into the chlorophyll fluorescence and photosynthesis processes inside plants.

Graphical abstract: Optofluidic chlorophyll lasers

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 17 Apr 2016, accepted on 12 May 2016 and first published on 12 May 2016


Article type: Paper
DOI: 10.1039/C6LC00512H
Citation: Lab Chip, 2016,16, 2228-2235
  •   Request permissions

    Optofluidic chlorophyll lasers

    Y. Chen, Q. Chen and X. Fan, Lab Chip, 2016, 16, 2228
    DOI: 10.1039/C6LC00512H

Search articles by author