费斯特共振能量转移
接受者
罗丹明6G
波长
吸收(声学)
罗丹明
共振感应耦合
共振(粒子物理)
材料科学
荧光
尼罗河蓝
激发
光电子学
分子物理学
化学
原子物理学
光学
能量转移
物理
复合材料
凝聚态物理
量子力学
作者
S Aswathy,N. Soniya,K. Shadak Alee
出处
期刊:Journal of The Optical Society of America B-optical Physics
[Optica Publishing Group]
日期:2020-12-01
卷期号:38 (1): 273-273
被引量:3
摘要
We demonstrate efficient amplified spontaneous emission (ASE) of an acceptor from a sophisticated on-chip dynamic droplet Förster resonance energy transfer (FRET) system. The effect of changing the FRET efficiency and the pump wavelength absorption by the donor molecules is studied using two FRET pairs having dissimilar donors [Rhodamine 6G (R6G) and Rhodamine B (RB)] but a common acceptor [Nile blue (NB)], in microdroplets of different sizes and shapes ranging from spherical to squashed cylindrical. We show that the threshold of acceptor ASE depends on the extent of resonance of pump wavelength with the absorption maximum of the donor molecule, whereas this has no effect on the FRET efficiency, in agreement with the existing finding that FRET efficiency is independent of the excitation wavelength. We also demonstrate a tunability of 18 nm in the acceptor ASE by tweaking the size and shape of the generated droplets from spherical to squashed cylindrical. The reason for tunability is attributed to a change in the effective concentration of the dye molecules in different droplets.
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