An Optical Nanocavity Incorporating a Fluorescent Organic Dye Having a High Quality Factor
An Optical Nanocavity Incorporating a Fluorescent Organic Dye Having a High Quality Factor
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DOI：
10.1021/nn1001479
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发表时间：
2010-06-01
期刊：
影响因子：
17.1
通讯作者：
Lidzey, David G.
中科院分区：
文献类型：
--
作者：
Adawi, Ali M.;Murshidy, Mohamed M.;Lidzey, David G.
我们已经制造了一个L3光学纳米腔工作在可见光波长，是涂有一层薄膜的荧光分子染料。腔体直接制造成预蚀刻的独立氮化硅（SIN）膜，并且具有Q = 2650的品质因数。这种相对高的Q因子接近理论极限，该理论极限可以从使用氮化硅作为介电材料的L3纳米腔中预期，并且是由于我们已经开发的无溶剂腔制造方案而实现的。我们表明，从红色发射荧光染料涂覆到腔表面的荧光经历了强烈的发射强度增强在一系列的离散波长对应的腔模式。三维时域有限差分（FDTD）计算被用来预测的模式结构的腔与理论和实验之间表现出良好的协议。
We have fabricated an L3 optical nanocavity operating at visible wavelengths that is coated with a thin-film of a fluorescent molecular-dye. The cavity was directly fabricated into a pre-etched, free-standing silicon-nitride (SIN) membrane and had a quality factor of Q = 2650. This relatively high Q-factor approaches the theoretical limit that can be expected from an L3 nanocavity using silicon nitride as a dielectric material and is achieved as a result of the solvent-free cavity-fabrication protocol that we have developed. We show that the fluorescence from a red-emitting fluorescent dye coated onto the cavity surface undergoes strong emission intensity enhancement at a series of discrete wavelengths corresponding to the cavity modes. Three dimensional finite difference time domain (FDTD) calculations are used to predict the mode structure of the cavities with excellent agreement demonstrated between theory and experiment.