Skip to main content
. Author manuscript; available in PMC: 2017 Jun 21.
Published in final edited form as: Lab Chip. 2016 May 25;16(12):2228–2235. doi: 10.1039/c6lc00512h

Figure 1.

Figure 1

(a) Molecular structure of chlorophyll a (Chla) extracted from spinach leaves. (b) Normalized absorption and emission spectrum of Chla in ethanol. (c) Schematic diagram of the chlorophyll laser using a high Q-factor optofluidic ring resonator (OFRR). Green particles represent the chlorophyll molecules dissolved in ethanol. The laser was excited by a pulsed optical parametric oscillator (OPO) (pulse width=5 ns; wavelength=430 nm). The diagram on the right side shows the profile of the OFRR and the whispering gallery mode (WGM) circulating along the OFRR circumference. D=80 μm; d=2 μm.