Lasing action of active-particles dispersed in microdroplets and its enhanced characteristics by highly scattering intralipid-10% mixture |
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| Authors: | Taniguchi Hiroshi Kurosawa Akinori Tanosaki Shinji Devaraj B. Inaba Humio |
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| Affiliation: | (1) Department of Electrical and Electronic Engineering, Iwate University, 4-3-5 Ueda, Morioka, 020-8551, Japan;(2) Biophotonics Information Laboratories, 2-2-1 Matsuei, Yamagata, 990-2473, Japan;(3) Department of Electronics, Tohoku Institute of Technology, 35-1 Yagiyama-Kasumi-Cho, Taihaku-Ku, Sendai, 982-8577, Japan |
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| Abstract: | The first laser action of active-particles of 1–2  m in diameter, red fluorescent-powder (FP), dispersed in nonactive (nonlasing)  100 m-sized liquid microdroplets is reported. Lasing characteristics of FP-containing microdroplets by mixing Intralipid-10% as highly scattering turbid media are also described. Well-defined lasing thresholds can be confirmed from the FP-dispersed pure microdroplets, and lowered lasing threshold along with enhanced lasing emission is achieved by appropriately mixing the Intralipid-10% solution. Lasing threshold in these microdroplets can be determined not through the spectral narrowing features but through the input–output data. We believe that these new microdroplet configurations offer one of the new categories of lasing media and they seem also to simulate to some biological pigments or organelles contained in cells and small tissues. |
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| Keywords: | active particle fluorescent powder highly scattering medium intralipid-10% solution microdroplet laser new microdroplet-configuration |
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