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Summary: This study achieves wideband absorption in the long wavelength infrared range using a metamaterial absorber based on nanowire cross surrounding. The absorber has polarization independence and high absorptivity in the LWIR band, which can be adjusted by changing the geometric parameters. It is suitable for infrared imaging, thermoelectronic devices, and thermal detection applications.
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Summary: In this paper, an active tunable terahertz bandwidth absorber based on single-layer graphene is proposed. It shows high absorption and excellent physical regulation in the range of 3.7 THz-8 THz when the Fermi energy (E-f) of graphene is 1.5 eV. The absorber exhibits superior tunability by adjusting physical parameters and E-f, and it is also polarization independent and insensitive to the incident angle.
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Prateek Mishra et al.
Summary: We demonstrate functional switching of electromagnetic induced transparency (EIT) in terahertz (THz) metasurface using a hybrid metasurface containing a phase change material, Ge2Sb2Te5 (GST). The THz time domain spectroscopy shows that the hybrid metasurface can achieve both EIT and non-EIT responses by changing the phase of GST. EIT in the metasurface has the potential for applications in biosensors, THz buffers, modulators, and other functional THz communication devices.
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Xianwen Zhou et al.
Summary: A patterned monolayer graphene metamaterial structure is proposed to generate triple plasmon-induced transparency, which can be effectively modulated by the Fermi levels of graphene. The structure shows high-sensitive refractive index sensing and excellent slow-light performance, providing a new idea for designing graphene-based sensors and slow light devices.
COMMUNICATIONS IN THEORETICAL PHYSICS
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Summary: In this study, a solar absorber and thermal emitter with ultra-broadband perfect absorption and high thermal radiation efficiency were designed. The absorber achieved a high absorption efficiency of 91.5% in the entire wavelength range and an average absorption efficiency of 99% in the selected range. The structure also exhibited excellent performance as a thermal emitter, with an optimal working temperature of 2000 K and a thermal radiation efficiency of 94.8%.
APPLIED THERMAL ENGINEERING
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Feng Qin et al.
Summary: The effect of double hole layer on the performance of PSCs was analyzed by theoretical calculation, and an optimized structure of PSCs was proposed. The addition of a CuO hole layer with an energy gap of 1.5 reduced direct recombination and increased FF, while Spiro-OMeTAD reduced electron recombination and increased Jsc. The proposed structure increased the PCE from 16.82% to 21.82%.
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Ye Zhang et al.
Summary: A graphene-based long-wavelength infrared modulator with high contrast is presented. The frequency detuning of magnetic and electric surface plasmons can be controlled by adjusting the graphene Fermi energy, leading to high modulation depth and low insertion loss.
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Pengju Yao et al.
Summary: A novel terahertz metamaterial structure based on patterned monolayer graphene is proposed. The structure utilizes the adjustment of graphene's Fermi level to tune the plasmon-induced transparency (PIT) phenomenon and explores the internal mechanism through coupled-mode theory. The research shows that the absorption rate of the structure can reach 50%, providing guidance for graphene terahertz absorption devices.
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Yipeng Qin et al.
Summary: In this study, a terahertz-band metamaterial composed of multilayer patterned graphene is proposed, and triple plasmoninduced transparency is achieved by coupling three bright modes with one dark mode. The results show that dynamic tuning and multimode electro-optics switching can be achieved by changing the Fermi level, enabling the design of synchronous and asynchronous electro-optics switches.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2022)
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Naoki Ichiji et al.
Summary: This study investigates plasmon-induced transparency (PIT) in a resonator structure consisting of two orthogonally arranged metal-insulator-metal nanocavities. The results show that when both cavities in the structure resonate at the same frequency, the PIT effect can modulate the spectral properties. The modulation depends on the resonance order of the cavity coupled directly to the external field.
Article
Chemistry, Physical
Zoe Scott et al.
Summary: This paper presents an analytical model describing the transition to a strong coupling regime for an ensemble of emitters coupled to a localized surface plasmon. The model involves two distinct mechanisms involving collective states of emitters interacting with the plasmon mode. The first mechanism is the near-field coupling between the bright collective state and the plasmon mode, while the second mechanism is the Fano interference between the plasmon dipole moment and the plasmon-induced dipole moment of the bright collective state. These mechanisms strongly affect the shape of scattering spectra.
JOURNAL OF CHEMICAL PHYSICS
(2022)
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K. M. Dhriti et al.
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JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
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Shanshan Zhuo et al.
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T. Nurmohammadi et al.
Summary: In this study, a plasmonic induced transparency effect was achieved in the near infra-red spectrum by utilizing one circular and two rectangular gold rings in a silicon substrate covered by a monolayer graphene sheet. This effect can be used for slow-light devices and active plasmonic modulation in communication.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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Xuetao Gan et al.
Summary: Two-dimensional (2D) materials with layered structures have exceptional electronic and optical attributes, making them promising for various functions in light wave technology. In this study, we discuss state-of-the-art optical intensity modulators based on 2D materials, focusing on their operation spectral ranges determined by optical bandgaps. By leveraging the rich electronic structures and light-matter interactions of different 2D materials, we explore the working mechanisms and device architectures of modulators at specific wavelength ranges. These modulators have potential applications in fiber and chip optical communications, as well as chemical bond spectroscopy, free-space communications, and environment/health sensing.
APPLIED PHYSICS REVIEWS
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Guanyu Liu et al.
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Shuxian Chen et al.
Summary: A hybrid bilayer structure of black phosphorus (BP) and graphene is proposed for achieving plasmon-induced transparency (PIT) with high sensitivity. The study analyzes the surface plasmon hybridization between graphene and anisotropic BP, and describes the PIT effect using the coupled oscillator model. The results show tunable PIT effects and high refractive index sensitivity, which can be used for multiple refractive index sensing functions.
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Zhaoyang Shen et al.
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APPLIED PHYSICS EXPRESS
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Zhaoyang Shen et al.
Summary: In this study, we simulate, measure, and analyze an electromagnetically induced transparency-like (EIT-like) metamaterial composed of a Reuleaux triangle split-ring resonator (RT-SRR) and a Y-type strip (YS). The EIT-like metamaterial exhibits a transparency peak at 12.54 GHz with a transmission coefficient of 91% and polarization sensitivity. The physical mechanism behind the transparency peak is analyzed through the analysis of electric field distributions, surface current distributions, and the calculated results for the radiated power of the electric multipoles.
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Junyi Li et al.
Summary: This research proposes a metamaterial structure composed of a graphene sandwich structure to achieve triple plasmon-induced transparency. The phenomenon is generated by the interaction of bright-bright modes in the proposed structure, and the results are consistent with simulations using the finite difference time domain method. Additionally, the study discusses the effects of graphene Fermi level and scattering rate on the transmission spectrum. The results show that five-fold switching effects are achieved with different modulation depths, and the graphene strip can be adjusted by changing Fermi levels. This model has potential applications in multi-functional modulators and optical switches in the terahertz band.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
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Hongting Chen et al.
Summary: In this paper, we propose a multifunctional micro-nano device with a hybrid metamaterial-waveguide system that achieves triple plasmon-induced transparency (PIT). The mechanisms for the formation of the three transparent peaks have unique characteristics and can be dynamically tuned by the gate voltage of the graphene used. The proposed structure can be applied in highly sensitive refractive index sensors or devices with significant slow light effects.
Article
Physics, Applied
Chunzhen Fan et al.
Summary: Graphene metamaterials have achieved tunable plasmon-induced transparency and multispectral transparency in the THz region. The number of optical resonant peaks can be flexibly altered with the designed strip length, and multispectral transparency can also be dynamically tuned via Fermi energy. These active and switchable graphene metamaterials show promise in applications such as optical filters, switchers, and sensors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
Min Li et al.
Summary: In this paper, an easily implemented monolayer graphene structure is proposed for achieving triple plasmon-induced transparency and absorption effects. By altering the Fermi energy and carrier mobility of graphene, the absorption intensity can be dynamically controlled over a broadband frequency range. The triple plasmon-induced absorption spectrum shows 20 times more absorption bands compared to monolayer graphene, with a sensitivity of 0.4 THz RIU-1 for terahertz plasmonic sensing applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
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Optics
Km Dhriti et al.
Summary: This paper investigates the plasmon-induced transparency effect in a parallel-plate waveguide, with the ability to control transparency by varying the refractive index of the dielectric material without changing physical dimensions. Results show the potential for switchable and tunable transparency effects in terahertz waveguides.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
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Min Sup Choi et al.
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Xiao Zhang et al.
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