Light Conversion Efficiency of Emitters on Top of Plasmonic and Dielectric Arrays of Nanoparticles
Light Conversion Efficiency of Emitters on Top of Plasmonic and Dielectric Arrays of Nanoparticles
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纳米颗粒等离子体和介电阵列顶部发射器的光转换效率
DOI：
10.1149/2.0202001jss
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发表时间：
2019
影响因子：
2.2
通讯作者：
Rivas J. G?mez
中科院分区：
文献类型：
--
作者：
Murai S.;Noguchi K.;Castellanos G. W.;Wang S.;Tanaka K.;Rivas J. G?mez
等离子体粒子阵列的耦合发光层提供了在光谱和空间上定制光致发光的机会，并为固态照明应用中的荧光粉设计开辟了新的场所。虽然在某些频率和特定方向上的光致发光的显著增强已经被报道并描述为泵浦增强和发射脱耦，但金属的光吸收对转换效率和总光致发光强度的影响研究得较少。本文利用积分球研究了沉积在银和二氧化钛衍射阵列上的发射层的光吸收。结果表明，发射体激发波长处的吸收对转换效率有关键影响，而发光波长处的吸收对总辐射强度的影响不显著。本文中使用的评估技术用于量化阵列的光吸收，从而设计出可用于固态照明应用的谐振系统的工作配方。
Coupling layers of light emitters to arrays of plasmonic particles provides an opportunity to tailor the photoluminescence, both spectrally and spatially, and opens new venues for the design of phosphors in solid-state-lighting applications. While a significant enhancement of the photoluminescence for certain frequencies and in defined directions has been reported and described in terms of pump enhancement and emission outcoupling, the effect of optical absorption by metals on the conversion efficiency and total photoluminescence intensity is less well studied. Here, we investigate the optical absorption for emitter layers deposited on diffractive arrays of silver and titanium dioxide using an integrating sphere. The results show that absorption at the excitation wavelengths of the emitter has a critical impact on the conversion efficiency, while the absorption at luminescence wavelengths does not modify significantly the total radiation intensity. The evaluation technique used in this manuscript to quantify the optical absorption by the array, leads to a working recipe to design resonant systems that can be exploited in solid-state-lighting applications.