Nolan Peard, D. Callahan, J. Perkinson, Qingyang Du, N. Patel, Takian Fakhrul, J. LeBlanc, C. Ross, Juejun Hu, Christine Y. Wang
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引用次数: 2
摘要
我们给出了n型InSb中法拉第效应的测量结果。在$\lambda$ = 8 $\mu$ m - 12 $\mu$ m长波红外波段，测定了$10^{17}$$\text{cm}^{-3}$附近载流子浓度范围内的Verdet系数。测量了每个样品的吸收系数，并计算了其优值。从这些测量结果中，我们计算了载流子的有效质量，并说明了优点系数随波长的变化。本文讨论了一种通过法拉第旋转产生可调谐带通滤波器的方法，并给出了原型装置的初步结果。
Magneto-optical properties of InSb for infrared spectral filtering
We present measurements of the Faraday effect in n-type InSb. The Verdet coefficient was determined for a range of carrier concentrations near $10^{17}$ $\text{cm}^{-3}$ in the $\lambda$ = 8 $\mu$m - 12 $\mu$m long-wave infrared regime. The absorption coefficient was measured and a figure of merit calculated for each sample. From these measurements, we calculated the carrier effective mass and illustrate the variation of the figure of merit with wavelength. A method for creating a tunable bandpass filter via the Faraday rotation is discussed along with preliminary results from a prototype device.
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