Dye Giant Absorption and Light Confinement Effects in Porous Bragg Microcavities,ACS Photonics

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Dye Giant Absorption and Light Confinement Effects in Porous Bragg Microcavities
ACS Photonics ( IF 6.5 ) Pub Date : 2018-01-09 00:00:00 , DOI: 10.1021/acsphotonics.7b01283
Manuel Oliva-Ramírez ₁ , Jorge Gil-Rostra ₁ , Adam C. Simonsen ₂ , Francisco Yubero ₁ , Agustín R. González-Elipe ₁

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This work presents a simple experimental procedure to probe light confinement effects in photonic structures. Two types of porous 1D Bragg microcavities with two resonant peaks in the reflection gap were prepared by physical vapor deposition at oblique angle configurations and then infiltrated with dye solutions of increasing concentrations. The unusual position shift and intensity drop of the transmitted resonant peak observed when it was scanned through the dye absorption band have been accounted for by the effect of the light trapped at their optical defect layer. An experimentally observed giant absorption of the dye molecules and a strong anomalous dispersion in the refractive index of the solution are claimed as the reasons for the observed variations in the Bragg microcavity resonant feature. Determining the giant absorption of infiltrated dye solutions is proposed as a general and simple methodology to experimentally assess light trapping effects in porous photonic structures.

中文翻译：

多孔布拉格微腔中染料的吸收和光限制效应

这项工作提出了一个简单的实验过程，以探测光子结构中的光限制效应。通过在倾斜角度配置物理气相沉积制备两种类型的在反射间隙中具有两个共振峰的多孔一维布拉格微腔，然后用浓度递增的染料溶液渗透。当通过染料吸收带对其进行扫描时，观察到的透射共振峰出现了异常的位置偏移和强度下降，这是由于在其光学缺陷层处捕获的光的影响造成的。实验上观察到的染料分子的巨大吸收和溶液折射率的强烈反常分散是声称的布拉格微腔共振特征变化的原因。

更新日期：2018-01-09

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