Article
Engineering, Electrical & Electronic
Dwight W. W. Swett
Summary: The potential of Fourier transform infrared (FT-IR) on a chip as a disruptive technology for downhole chemical analysis in the oil and gas industry is discussed. The cooling requirements of conventional technologies have been a critical obstacle to downhole integration. A design and numerical analysis of an uncooled miniaturized Fourier transform mid-infrared (FTMIR) spectrometer compatible with downhole thermal environments is reported, featuring a metasurface detector/source combination derived from conformal mapping contours.
IEEE SENSORS JOURNAL
(2023)
Article
Optics
Zhao Chen, Yudong Weng, Junku Liu, Nan Guo, Yaolun Yu, Lin Xiao
Summary: In this study, a dual-band perfect absorber for mid-infrared detectors based on dielectric metal metasurfaces is theoretically demonstrated. The absorber shows two narrow absorption peaks with high absorption values, and a thermal detector with fast response time is realized at room temperature. This research provides a promising approach for designing high-performance photodetectors in nano-integrated photonics.
PHOTONICS RESEARCH
(2021)
Article
Chemistry, Physical
Boxun Li, Yi Wei, Lili Zeng, Mingliang Liu, Ruquan Wen, Xingjiao Zhang, Chaosheng Deng
Summary: In this work, a perfect absorber based on a black phosphorus (BP) and bowtie shaped cavity is proposed, which exhibits high tunability and excellent optical performance. The absorption spectrum can be adjusted by changing the structural parameters, and the optical properties of BP can be controlled by applying an external electric field. The absorption and Q-factor can also be flexibly tuned by varying the polarization direction of incident light. This absorber has promising applications in optical switches, sensing, and slow light, providing new perspectives for the practical application of BP and possibilities for more applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Qinyu Qian, Chinhua Wang, Li Fan, Liwen Cheng, Haitao Chen, Liang Zhao
Summary: This article introduces an ultra-broadband metasurface perfect absorber based on triple Mie resonances from three sets of nanopillars, suitable for visible and NIR region with high absorption and wide angular-insensitivity. Fabrication of the metasurface structures is efficiently achieved through double-beam UV interference lithography and sputter coating depositions. Experimental results show high absorption rates averaging 0.961 in the wavelength band from 400 to 1800 nm.
Article
Materials Science, Multidisciplinary
Bingzhen Li, Yuhua Chen, Qingqing Wu, Yan Li, Yaxing Wei, Jijun Wang, Fangyuan Li, Xinwei Liu
Summary: A novel ultrathin narrowband metasurface absorber with bidirectional perfect absorption properties is proposed in this study, based on a tri-layer metal square-circular-square patch (SCSP) structure. Simulation results demonstrate a remarkable absorbance of 98.1% for the proposed absorber, which is consistent with experimental and theoretical calculations. The absorber exhibits stable wide-angle absorption properties for both TE and TM waves under various oblique incidence angles.
Article
Chemistry, Physical
Ran Wang, Song Yue, Zhe Zhang, Yu Hou, Hongda Zhao, Shitian Qu, Man Li, Zichen Zhang
Summary: This paper numerically demonstrates a broadband perfect absorber in the visible range, which has a high absorptance and potential applications in photovoltaics and photodetection.
Article
Engineering, Electrical & Electronic
Bahareh Khodadadi, Pejman Rezaei, Vahid Ghods, Majid Babaeinik
Summary: This article proposes and examines a polarization-insensitive broadband adjustable THz metamaterial absorber. The absorber is made up of a periodic array of patterned graphene elements, providing a wide bandwidth and high absorption rate. It exhibits polarization-independent characteristics and is suitable for various applications.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Amina Shafique, Muhammad Ashar Naveed, Sumbel Ijaz, Muhammad Zubair, Muhammad Qasim Mehmood, Yehia Massoud
Summary: In this study, a novel refractory metal Vanadium Nitride (VN) is proposed as a stable absorber and emitter for solar-thermophotovoltaic (STPV) systems. The proposed absorber exhibits an average absorption of >98% for the wavelength range of 300-800 nm with unity peak absorption at 340 nm. The proposed emitter is designed for a CIGS PV cell and achieves an emittance of >99% for a bandgap energy of 1.14 eV (1089 nm). The high broadband absorption, narrowband emittance, and high-temperature endurability of the proposed VN platform make it a potential candidate for solar energy harvesting systems.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
Jiang Gong, Xingzhe Shi, Yuanfu Lu, Fangrong Hu, Rong Zong, Guangyuan Li
Summary: A dynamically tunable triple-band terahertz perfect absorber based on monolayer graphene metasurface is proposed, showing near-unitary absorption at three different frequencies. The absorption bands can be actively tuned by varying the graphene chemical potential. This absorber is insensitive to incident angle and polarization, making it attractive for practical applications.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Mingpan Xu, Lin Guo, Pengfei Zhang, Yu Qiu, Qing Li, Jikang Wang
Summary: The research proposes, optimizes and analyzes a metasurface absorber consisting of an octagonal prism array, which achieved high solar absorptivity, low emissivity, and high photothermal efficiency for high-temperature solar thermal applications. The optimized absorber achieves near-perfect spectral selectivity compared with the perfect solar absorber. The coupling effects of multi-plasmon resonance modes and impedance matching contribute to the high solar absorptivity, while impedance mismatching minimizes the emissivity in the mid-IR region. The study also investigates the influence of structural parameters on spectral absorptivity and demonstrates that the metasurface absorber is highly insensitive to both polarization and incident angles, making it suitable for high-temperature solar thermal devices.
Article
Materials Science, Multidisciplinary
Panpan Gao, Jianfeng Sun, Wenxuan Li, Chenxi Su, Zhuoyue Sun, Feng Xia, Kun Zhang, Lifeng Dong, Maojin Yun
Summary: We propose a temperature-tunable and dual-broadband switchable coherent perfect absorber (CPA) composed of an annulus-disk-shaped InSb pattern and a complementary graphene layer. By controlling the Fermi level of graphene, the temperature of InSb, or the relative phase of incident beams, the working frequency and absorption of the CPA can be continuously adjusted. The designed CPA exhibits broadband absorptance of over 90% in the frequency range of 0.145 THz to 1.24 THz, and can be thermally tuned in the THz region. Additionally, the absorptivity can be continuously varied between less than 1.2% and more than 90% in the dual-band and broadband modes by altering the relative phase of input beams.
RESULTS IN PHYSICS
(2023)
Article
Optics
Haosen Zhang, Kedi Wu
Summary: A single-layer metasurface structure is demonstrated to achieve broadband near-perfect absorption at visible light to near-infrared wavelengths. The structure utilizes nanoposts with two different sizes to excite Mie resonances, efficiently coupling incident light to the loss substrate and enhancing absorption. The proposed structure also achieves high absorption efficiency at large incident angles, and has potential applications in advanced optical capture, integrated photon systems, and optoelectronic devices.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Jiayi Jiang, Yan Cao, Xin Zhou, Haixia Xu, Kexin Ning, Xuan Xiao, Yanxin Lu, Cairong Ding, Yihang Chen, Jianwen Dong
Summary: In this study, a metasurface broadband perfect absorber with an ultrathin thickness of 148 nm and a large area of around 10 cm(2) was experimentally demonstrated. The absorption efficiency of this absorber exceeded 97% in the wavelength range of 400 to 800 nm. The broadband absorption was attributed to the overlapped resonances of Fabry-Perot, surface plasmon polariton, and localized surface plasmons. These findings provide a novel technique for the manufacturing of absorption-based devices at wafer-scale and low cost for applications such as high-contrast imaging and optical modulation.
Article
Physics, Multidisciplinary
Yongzhi Cheng, Jingcheng Zhao
Summary: This paper presents a simple design of a six-band terahertz perfect metasurface absorber composed of a single circular-split-ring structure. The absorber achieves an average absorbance of 99.1% at six distinct frequencies under normal incident THz wave, and the distribution characteristics of the electric field indicate that the absorption peaks mainly originate from the combination of higher-order localized surface plasmon and propagating surface plasmon resonance modes. Additionally, the numerical investigation of the geometric parameters' influence on the resonance absorption properties of the metasurface absorber is also conducted.
Article
Nanoscience & Nanotechnology
Pouria Zamzam, Pejman Rezaei, Seyed Amin Khatami
Summary: This paper presents a quad-band, polarization-insensitive metamaterial perfect absorber based on bi-layer graphene. By stacking the double layer graphene metasurface, a quad-band perfect absorber with an average absorption of 99.43% at four different frequencies is achieved. The proposed structure has advantages of tunable resonant frequency, polarization insensitivity, and tolerance to incident angles, showing potential in filtering, detection, imaging, and photodetector applications.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
