Journal
OPTICS LETTERS
Volume 43, Issue 16, Pages 4021-4024Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.004021
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Funding
- National Research Foundation of Korea (NRF) [NRF-2012M3A7B4049800]
- Ministry of Science, ICT and Future Planning (MSIP) [IITP 2014-3-00524]
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We experimentally demonstrated a green liquid laser at the wavelength of 570 nm, utilizing the optical gain of vitamin B-2 in a highly polar organic solvent, and proposed an efficient method to enhance its lasing efficiency by adding DNA-lipid complex (DNA-CTMA) in the solution. Optical properties of vitamin B-2 in the hexafluoro-2-propanol solvents were investigated by adding various amounts of DNA-CTMA in terms of the UV-visible absorbance, the visible emission, and the fluorescence lifetime. A Fabry-Perot cavity was built to obtain the laser oscillation at 570 nm using a pulsed pump source at the wavelength of 450 nm, 5 ns pulse duration, and 10 Hz repetition rate. By adding DNA-CTMA, both the output power and slope efficiency were enhanced along with a significant reduction of the lasing threshold pump power. The proposed scheme could open new potential for highly efficient biolasers. (C) 2018 Optical Society of America
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