Infrared Perfect Absorber and Its Application As Plasmonic Sensor

Liu, Na; Mesch, Martin; Weiß, Thomas; Hentschel, Mario; Gießen, Harald

doi:10.1021/nl9041033

Cited by 2,651 publications

(1,755 citation statements)

References 40 publications

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“…Metamaterials are also promising candidates to enhance electromagnetic wave absorption, and have been shown to yield perfect absorption at microwave 10 , terahertz 11 and infrared 12 -14 frequencies. To date, however, resonant absorption schemes using plasmonic nanostructures and metamaterials have been designed to absorb light within a narrow wavelength range, and with few exceptions 6,7,14 , the resonant absorption behaviour strongly depends on the incident polarization. Achieving a resonant response that spans a broad wavelength range is required for broadband thin-fi lm thermal emitters 15 , and thermophotovoltaic 12 cells, as well as plasmonic scatterers 16 -18 for photovoltaic cells.…”

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confidence: 99%

Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbers

et al. 2011

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Resonant plasmonic and metamaterial structures allow for control of fundamental optical processes such as absorption, emission and refraction at the nanoscale. Considerable recent research has focused on energy absorption processes, and plasmonic nanostructures have been shown to enhance the performance of photovoltaic and thermophotovoltaic cells. Although reducing metallic losses is a widely sought goal in nanophotonics, the design of nanostructured ' black ' super absorbers from materials comprising only lossless dielectric materials and highly refl ective noble metals represents a new research direction. Here we demonstrate an ultrathin (260 nm) plasmonic super absorber consisting of a metal -insulatormetal stack with a nanostructured top silver fi lm composed of crossed trapezoidal arrays. Our super absorber yields broadband and polarization-independent resonant light absorption over the entire visible spectrum (400 -700 nm) with an average measured absorption of 0.71 and simulated absorption of 0.85. Proposed nanostructured absorbers open a path to realize ultrathin black metamaterials based on resonant absorption.

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Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbers

et al. 2011

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“…By lifting metal nanostructures above substrates with dielectric pillars, the index sensitivity of the resultant LSPR sensors can be increased because a large fraction of the spatial region with enhanced electric fields is exposed to the environment and accessible by molecular species 10,11 . More efforts have been made to reduce the FWHM values of LSPRs and therefore increase the FOM values [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] . An effective approach for reducing the FWHM values is to couple a LSPR with a different resonance mode that possesses a smaller FWHM.…”

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Plasmonic gold mushroom arrays with refractive index sensing figures of merit approaching the theoretical limit

et al. 2013

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Localized surface plasmon resonance (LSPR)-based sensing has found wide applications in medical diagnosis, food safety regulation and environmental monitoring. Compared with commercial propagating surface plasmon resonance (PSPR)-based sensors, LSPR ones are simple, cost-effective and suitable for measuring local refractive index changes. However, the figure of merit (FOM) values of LSPR sensors are generally 1-2 orders of magnitude smaller than those of PSPR ones, preventing the widespread use of LSPR sensors. Here we describe an array of submicrometer gold mushrooms with a FOM reaching B108, which is comparable to the theoretically predicted upper limit for standard PSPR sensors. Such a high FOM arises from the interference between Wood's anomaly and the LSPRs. We further demonstrate the array as a biosensor for detecting cytochrome c and alpha-fetoprotein, with their detection limits down to 200 pM and 15 ng ml À 1 , respectively, suggesting that the array is a promising candidate for label-free biomedical sensing.

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“…In this work, a dual-layered nanometallic absorber is employed to demonstrate voltage-controlled nonlinear optical processes. This type of metamaterial-based perfect absorber can be designed to capture all the energy of the incident light within a prescribed frequency range [23][24][25][26] . The schematic of the meta-device for EFISH and EFIOR is illustrated in Fig.…”

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confidence: 99%

Electrifying photonic metamaterials for tunable nonlinear optics

et al. 2014

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Metamaterials have not only enabled unprecedented flexibility in producing unconventional optical properties that are not found in nature, they have also provided exciting potential to create customized nonlinear media with high-order properties correlated to linear behaviour. Two particularly compelling directions are active metamaterials, whose optical properties can be purposely tailored by external stimuli in a reversible manner, and nonlinear metamaterials, which enable intensity-dependent frequency conversion of light waves. Here, by exploring the interaction of these two directions, we leverage the electrical and optical functions simultaneously supported in nanostructured metals and demonstrate electrically controlled nonlinear optical processes from a metamaterial. Both second harmonic generation and optical rectification, enhanced by the resonance behaviour in the metamaterial absorber, are modulated externally with applied voltage signals. Our results reveal an opportunity to exploit optical metamaterials as self-contained, dynamic electro-optic systems with intrinsically embedded electrical functions and optical nonlinearities.

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Infrared Perfect Absorber and Its Application As Plasmonic Sensor

Cited by 2,651 publications

References 40 publications

Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbers

Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbers

Plasmonic gold mushroom arrays with refractive index sensing figures of merit approaching the theoretical limit

Electrifying photonic metamaterials for tunable nonlinear optics

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