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Size-dependent optical properties of periodic arrays of semiconducting nanolines
Optics Express ( IF 3.8 ) Pub Date : 2020-02-21 , DOI: 10.1364/oe.386964
Andrzej Gawlik , Janusz Bogdanowicz , Andreas Schulze , Pierre Morin , Jan Misiewicz , Wilfried Vandervorst

We study the size-dependent optical properties of periodic arrays of semiconducting nanolines in the near-infrared to near-ultraviolet spectral range, where the absorption of the semiconductor increases. Using band structure calculations, we demonstrate that specific dimensions allow the slow down of the light, resulting in an enhanced absorption as compared to bulk material once the extinction coefficient of the semiconductor becomes comparable to its refractive index. Further, the refractive properties of the arrays can be tailored beyond the values of the constituting materials when the extinction coefficient of the semiconductor exceeds its refractive index. To confirm our theoretical findings, we propose a simple semi-analytical model for the light interactions with such structures and validate it with experimental reflectance spectra collected on arrays for the next-generation transistors.

中文翻译:

半导体纳米线周期阵列的尺寸依赖性光学性质

我们研究半导体纳米线在近红外到近紫外光谱范围内的周期性阵列的尺寸依赖性光学性质,在该范围内半导体的吸收增加。使用能带结构计算,我们证明,一旦半导体的消光系数变得与其折射率可比,则特定尺寸允许光变慢,与块状材料相比,吸收增强。此外,当半导体的消光系数超过其折射率时,可以使阵列的折射率特性超出构成材料的值。为了证实我们的理论发现,
更新日期:2020-03-02
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