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A quasi-droplet optofluidic ring resonator laser using a micro-bubble
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10.1063/1.3629814
/content/aip/journal/apl/99/9/10.1063/1.3629814
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/9/10.1063/1.3629814
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Illustration of the setup for the micro-bubble fabrication. (b) Microscopic image of the micro-bubble made on the pre-etched capillary. (c) SEM image of the broken micro-bubble for measuring wall thickness. The thickness of the micro-bubble wall near the equator is 560 nm.

Image of FIG. 2.
FIG. 2.

(Color online) Normalized electric field distribution of the 1st ((a) and (b)) and 2nd ((c) and (d)) TM WGM in the radial direction in the micro-bubble ((a) and (c)) and the droplet ((b) and (d)). The radii of the micro-bubble and the droplet are both 120 μm, and the wall thickness of the micro-bubble is 560 nm, as illustrated by solid lines, respectively. Wavelength near 590 nm is used in the calculation and the micro-bubble is assumed to be a perfect hollow sphere filled with low index liquid (RI = 1.33).

Image of FIG. 3.
FIG. 3.

(Color online) (a) Lasing spectrum of the quasi-droplet OFRR laser for 1 mM R6G in methanol. (b) Lasing threshold curve corresponding to (a). The threshold is approximately 300 nJ/mm2. (c) Lasing spectrum of the same for 1 μM R6G in methanol. (d) Lasing threshold curve corresponding to (c). The threshold is 5.3 μJ/mm2. Solid lines in (b) and (d) are the linear fit for the dye emission below and above the lasing threshold.

Image of FIG. 4.
FIG. 4.

Lasing spectrum of the quasi-droplet laser with 1 μM R6G.

Image of FIG. 5.
FIG. 5.

(Color online) (a) Lasing spectrum of the quasi-droplet OFRR laser when 1 mM LDS722 dye dissolved in methanol is flowed through the micro-bubble. The pump energy density is 0.81 μJ/mm2. (b) Corresponding threshold curve. The threshold is 0.52 μJ/mm2. (c) Lasing spectrum of the same when 1 mM R6G dye dissolved in quinoline is flowed through the micro-bubble. The pump energy density is 2.7 μJ/mm2. (d) Corresponding threshold curve. The threshold is approximately 400 nJ/mm2. Solid lines in (b) and (d) are the linear fit for the dye emission below and above the lasing threshold.

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/content/aip/journal/apl/99/9/10.1063/1.3629814
2011-08-29
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A quasi-droplet optofluidic ring resonator laser using a micro-bubble
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/9/10.1063/1.3629814
10.1063/1.3629814
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