A simple topology metamaterial blackbody for visible light

Guo, Yunsheng; Li, Jiansheng; Hou, Xiaojuan; Lv, Xiaolong; Liang, Hao; Zhou, Ji

doi:10.1016/j.jallcom.2016.12.423

Cited by 21 publications

(15 citation statements)

References 23 publications

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“…Unlike traditional MDM nanostructures, the proposed PPA is only composed of two functional layers: the periodic array of the SNRR structure and a continuous gold film. The SNRR array was chosen as the dielectric resonator in the visible regime, which can support strong plasmonic resonances with different excitation modes [ 34 , 35 , 36 , 37 ]. The dielectric constant of the silicon is obtained from the experimental data [ 38 ].…”

Section: Structure Design and Simulationmentioning

confidence: 99%

“…Silicon is one of feasible high refractive index materials that has been widely used to design optical devices, such as solar cells [ 29 ], detectors [ 30 ], color filters [ 31 , 32 ], photonic waveguides [ 33 ], and absorbers [ 34 ]. It has been demonstrated that this plasmon resonance in the silicon nanostructure could be tuned to enhance light absorption in the infrared and visible ranges [ 34 , 35 , 36 , 37 ]. The silicon-based PPA is easy to integrate into mature compatible complementary metal-oxide-semiconductor (CMOS) technology [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

“…Then, Liu proposed a PPA based on cavity mode using silicon patches array, multiband perfect absorption could be obtained in the infrared region [ 35 ]. More recently, PPAs based on a single silicon nanostructure were proposed and investigated and were shown to achieve a single-band perfect absorption in the visible region [ 36 , 37 ]. However, these PPAs still have drawbacks for polarization-sensitive or single-bands, which will limit their potential applications.…”

Section: Introductionmentioning

confidence: 99%

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Quad-Band Plasmonic Perfect Absorber for Visible Light with a Patchwork of Silicon Nanorod Resonators

Cao

Cheng

2018

Materials

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In this paper, a plasmonic perfect absorber (PPA) based on a silicon nanorod resonator (SNRR) for visible light is proposed and investigated numerically. The proposed PPA is only a two-layer nanostructure consisting of a SNRR periodic array and metal substrate. The perfect absorption mainly originates from excitation of the localized surface plasmon resonance (LSPR) mode in the SNRR structure. The absorption properties of this design can be adjusted by varying the radius (r) and height (h) of the SNRR structure. What is more, the stronger quad-band absorption can be achieved by combing four different radius of the SNRR in one period as a super unit-cell. Numerical simulation indicates that the designed quad-band PPA can achieve the absorbance of 99.99%, 99.8%, 99.8%, and 92.2% at 433.5 THz, 456 THz, 482 THz, and 504.5 THz, respectively. Further simulations show that the proposed PPA is polarization-insensitive for both transverse electric (TE) and transverse magnetic (TM) modes. The proposed PPA can be a desirable candidate for some potential applications in detecting, sensing, and visible spectroscopy.

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Section: Structure Design and Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quad-Band Plasmonic Perfect Absorber for Visible Light with a Patchwork of Silicon Nanorod Resonators

Cao

Cheng

2018

Materials

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“…Recently, the metasurfaces based on silicon nanostructures have attracted great attention due to their applications in detector [41], photonic waveguide [42], color generator and filter [43,44], and PLAs [45][46][47][48][49][50]. Similar to the metallic nanostructures, silicon is one of feasible high RI materials which could support various SPRs by structural design at optical frequency range.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 presents the design schematic of the visible PLA based on a hybrid metasurface, which only consisted consists of two functional layers: the periodic silicon cross nanostructure arrays constitute the top layer acting as the dielectric resonator, while the bottom layer is the gold substrate. It has been demonstrated that different patterned plasmonic silicon structures can support different SPR modes under incident light illumination, which could be applied to construct the PLAs from terahertz to visible frequency range due to its favorable optical properties [42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Triple-Band Perfect Light Absorber Based on Hybrid Metasurface for Sensing Application

2020

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A simple design of triple-band perfect light absorber (PLA) based on hybrid metasurface in visible region has been presented in this work, which turns out to be applicable for refractive index (RI) sensing. Distinct from previous designs, the proposed hybrid metasurface for visible PLA is only consisted of periodic silicon cross nanostructure arrays and gold substrate. The periodic silicon cross arrays deposited on the gold substrate contribute to excite the guided modes under the normal incident light illumination. According to the simulation results, it can be found that three perfect absorption peaks of 98.1%, 98.7%, and 99.6% which are located at 402.5 THz, 429.5 THz, and 471.5 THz, respectively, have been clearly observed in PLA. This triple-band perfect absorption effect could be attributed to the intrinsic loss of silicon material originated from the guided mode excitations caused by the standing waves of different orders. It has been confirmed that the perfect absorption properties of the PLA can be easily regulated by changing the geometric parameters of the unit-cell nanostructure. Furthermore, the designed PLA served as a RI sensor can achieve sensitivity of about 25.3, 41.3, and 31.9 THz /refractive index unit (RIU). It can be believed that the proposed design of PLA for RI sensing would provide great potential applications in sensing, detecting, the enhanced visible spectroscopy, etc.

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Experimental Implementation of Metasurfaces for Secure Multi‐Channel Image Encryption in the Infrared

Audhkhasi

Lien

Povinelli

2023

Advanced Optical Materials

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The ability to tailor light–matter interactions using artificially engineered materials has opened up new avenues for secure data storage and communication. This work presents an experimental investigation of metasurfaces for secure, multi‐channel image encryption in the infrared (IR). The proposed metasurfaces consist of an array of pixels, each designed to produce a wavelength‐ and polarization‐dependent IR absorptivity. A basis set of pixels is designed for encrypting images of arbitrary resolution on a given number of wavelength and polarization channels. These pixels are fabricated, and their spectral response is experimentally measured using Fourier transform infrared spectroscopy. The measured data is used to emulate the encryption and decryption of binary and 8‐bit grayscale images. Finally, the security of the encryption scheme proposed in this work is evaluated by performing statistical analyses on the image data stored on different channels. The results presented in this study suggest intriguing possibilities for the development of encrypted tagging technologies in the infrared and thus have implications for secure object identification and anti‐counterfeiting.

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A simple topology metamaterial blackbody for visible light

Cited by 21 publications

References 23 publications

Quad-Band Plasmonic Perfect Absorber for Visible Light with a Patchwork of Silicon Nanorod Resonators

Quad-Band Plasmonic Perfect Absorber for Visible Light with a Patchwork of Silicon Nanorod Resonators

Triple-Band Perfect Light Absorber Based on Hybrid Metasurface for Sensing Application

Experimental Implementation of Metasurfaces for Secure Multi‐Channel Image Encryption in the Infrared

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