Mid-infrared optical absorber based on anisotropic black phosphorus and magnesium fluoride
Optical and Quantum Electronics(2024)
摘要
This paper presents a mid-infrared absorber based on anisotropic black phosphorus (BP) stacked with magnesium fluoride (MgF2). BP has a sufficiently large electronic bandgap, and its high carrier mobility allows for efficient free-carrier absorption in the mid-infrared regimes. Magnesium fluoride is an ideal candidate for the mid-infrared absorber, providing optical transparency, efficient absorption, and antireflection properties due to its low refractive index. Different unit cell shapes were used to examine the absorbance for both the transverse electric mode (TE) and transverse magnetic mode (TM) polarization components. The results show that the absorbance for TM polarization is approximately 48
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关键词
Black phosphorus,Anisotropic,Infrared absorber,Magnesium fluoride
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