20 January 2015 Nanostructured thin film–based near-infrared tunable perfect absorber using phase-change material
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Abstract
Nanostructured thin film absorbers embedded with phase-change thermochromic material can provide a large level of absorption tunability in the near-infrared region. Vanadium dioxide was employed as the phase-change material in the designed structures. The optical absorption properties of the designed structures with respect to the geometric and material parameters were systematically investigated using finite-difference time-domain computations. Absorption level of the resonance wavelength in the near-IR region was tuned from the perfect absorption level to a low level (17%) with a high positive dynamic range of near-infrared absorption intensity tunability (83%). Due to the phase transition of vanadium dioxide, the resonance at the near-infrared region is being turned on and turned off actively and reversibly under the thermal bias, thereby rendering these nanostructures suitable for infrared camouflage, emitters, and sensors.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hasan Kocer, "Nanostructured thin film–based near-infrared tunable perfect absorber using phase-change material," Journal of Nanophotonics 9(1), 093597 (20 January 2015). https://doi.org/10.1117/1.JNP.9.093597 . Submission:
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