1. Random laser action from a natural flexible biomembrane-based device.
- Author
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Liu, Xiyun, Li, Tingshuai, Yi, Tao, Wang, Chuanke, Li, Jin, Xu, Min, Huang, Dengfeng, Liu, Shenye, Jiang, Shaoen, and Ding, Yongkun
- Subjects
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LASER dyes , *LASER beams , *RHODAMINES spectra , *GOLD nanoparticles , *MAGNETRON sputtering , *REDSHIFT , *MICROTECHNIQUE - Abstract
Incoherent random lasing action in flexible eggshell membranes infiltrated with rhodamine 6G laser dyes is demonstrated. Laser radiation is achieved by exciting samples with 1-ns pulses at 526 nm. A threshold of 58 μJ/pulse is measured for the samples. The minimum threshold decreases to 35 μJ/pulse after the sample is coated with gold nanoparticles using a magnetron sputtering technique. The peaks of emission spectra are observed to redshift from 576 to 596 nm as dye concentration rises from 0.03 to 0.6 wt%. A linewidth of approximately 5 nm is obtained for most samples. This study is expected to offer a new way to induce lasing emission using biological microfibrils, and enriches basic knowledge of biophotonics. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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