UV Fluorescence Lifetime Modification by Aluminum Nanoapertures
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- 作者：Xiaojin Jiao ; Eric M. Peterson ; Joel M. Harris ; Steve Blair
- 刊名：ACS Photonics
- 出版年：2014
- 出版时间：December 17, 2014
- 年：2014
- 卷：1
- 期：12
- 页码：1270-1277
- 全文大小：755K
- ISSN：2330-4022
文摘
We report excited-state lifetime modification of diffusing molecules by Al nanoapertures in the UV. Lifetime reductions of 鈭?.5脳 have been observed for the high quantum yield laser dye p-terphenyl in a 60 nm diameter aperture. The lifetime reduction is smaller for the low quantum yield molecule tryptophan, for which a maximum reduction of 鈭?.7 is observed. Lifetime reduction as a function of aperture size and native quantum yield is accurately predicted by simulation. Simulation further predicts greater net fluorescence enhancement for tryptophan compared to p-terphenyl, which is consistent with the expectation that low quantum yield emitters experience greater enhancement in the effective quantum yield.