Large-area, wide-angle, spectrally selective plasmonic absorber

By Chihhui Wu, B. Neuner, J. John, A. Milder, B. Zollars, S. Savoy, G. Shvets. 2011

302 citations recorded by the source corpus.

Nanohmics, Inc. 6201 E. Oltorf, Suite 400, Austin, TX 78741(Dated: April 18, 2011)A simple metamaterial-based wide-angle plasmonic absorber is introduced, fabricated, and exper-imentally characterized using angle-resolved infrared spectroscopy. The metamaterials are preparedby nano-imprint lithography, an attractive low-cost technology for making large-area samples. Thematching of the metamaterial’s impedance to that of vacuum is responsible for the observed spec-trally selective “perfect” absorption of infrared light. The impedance is theoretically calculatedin the single-resonance approximation, and the responsible resonance is identified as a short-rangesurface plasmon. The spectral position of the absorption peak (which is as high as 95%) is exper-imentally shown to be controlled by the metamaterial’s dimensions. The persistence of “perfect”absorption with variable metamaterial parameters is theoretically explained. The wide-angle natureof the absorber can be utilized for sub-diffraction-scale infrared pixels exhibiting spectrally selectiveabsorption/emissivity.I. INTRODUCTION

Subfields: Biomedical Engineering, Civil and Structural Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/772a47c0b64ceaf318843a8b7a4e19709c1c0615

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In Biomedical Engineering

1. Boqin Zhao
2. F. Capasso
3. Mikhail A. Kats
4. Liping Wang
5. Zhuomin M. Zhang
6. N. Yu
7. Sergei A. Tretyakov
8. Shuang Zhang

In Civil and Structural Engineering

1. Boqin Zhao
2. Zhuomin M. Zhang
3. Liping Wang
4. Yong Shuai

In Electronic, Optical and Magnetic Materials

1. F. Capasso
2. Mikhail A. Kats
3. Zhuomin M. Zhang
4. Liping Wang
5. Boqin Zhao
6. N. Yu
7. Mohammadreza Khorasaninejad
8. Xingjie Ni

Citations in the corpus

• Optical absorbers based on strong interference in ultra‐thin films (2016, background): “can be invoked to explain a broad range of situations in electromagnetics where power is efficiently transferred to a resonator, such as in the case of plasmonic (or “metamaterial”) perfect absorbers [45], and “coherent perfect absorbers” or “anti-lasers” [46]. 6 Fig. 2. Schematics and phasor diagra”