Tunable and scalable broadband metamaterial absorber involving VO<sub>2</sub>-based phase transition

Lei, Lei; Lou, Fei; Tao, Keyu; Huang, Haixuan; Cheng, Xin; Xu, Peng

doi:10.1364/prj.7.000734

Cited by 83 publications

(46 citation statements)

References 38 publications

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“…Since Landy et al demonstrated the first metamaterial absorber with one perfect absorption peak in the microwave band through an experiment 19 , the control and engineering of the spectral absorption properties of MPAs has attracted significant interest. In their experiment, broadband perfect absorption was achieved with MPAs in microwave regime [20][21][22][23][24] and was extended from visible [25][26][27][28][29][30][31][32][33][34][35][36][37] , infrared [38][39][40][41][42][43][44][45][46][47][48][49][50][51] and THz [52][53][54][55][56][57] bands. This study will compare these representative theoretical and experimental works on the topic of broadband MPAs from visible to infrared bands in supplement document.…”

Section: Introductionmentioning

confidence: 98%

Ultra-broadband metamaterial absorbers from long to very long infrared regime

et al. 2021

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Broadband metamaterials absorbers with high absorption, ultrathin thickness and easy configurations are in great demand for many potential applications. In this paper, we first analyse the coupling resonances in a Ti/Ge/Ti three-layer absorber, which can realise broadband absorption from 8 to 12 μm. Then we experimentally demonstrate two types of absorbers based on the Ti/Ge/Si3N4/Ti configuration. By taking advantage of coupling surface plasmon resonances and intrinsic absorption of lossy material Si3N4, the average absorptions of two types of absorbers achieve almost 95% from 8 to 14 μm (experiment result: 78% from 6.5 to 13.5 μm). In order to expand the absorption bandwidth, we further propose two Ti/Si/SiO2/Ti absorbers which can absorb 92% and 87% of ultra-broadband light in the 14–30 μm and 8–30 μm spectral range, respectively. Our findings establish general and systematic strategies for guiding the design of metamaterial absorbers with excellent broadband absorption and pave the way for enhancing the optical performance in applications of infrared thermal emitters, imaging and photodetectors.

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Section: Introductionmentioning

confidence: 98%

Ultra-broadband metamaterial absorbers from long to very long infrared regime

et al. 2021

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“…This phase transformation can be caused by light excitation, thermal excitation or external electric excitation. After phase transition, the conductivity of VO 2 [43]. The dynamic adjustment of absorption bandwidth is realized.…”

Section: Introductionmentioning

confidence: 99%

VO₂-Based Switchable Metasurface With Broadband Photonic Spin Hall Effect and Absorption

Song

2021

IEEE Photonics J.

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Arbitrary control and dynamic tuning of circularly polarized (CP) wave are of great significance to photonic research and application. Here, a terahertz switchable metasurface is designed with bifunctional properties based on a mixed structure of graphene and vanadium dioxide (VO 2 ). The design consists of VO 2 strips, topas spacer, VO 2 film, graphene patch, topas spacer, and metallic film. When VO 2 is metal, this metasurface realizes PSHE for CP wave in a wide frequency band of 0.7-1.5 THz. When VO 2 is insulator, the design behaves as an absorber. It has a broadband absorption with more than 90% absorptance in the range of 0.48-1.88 THz, and there are two resonant peaks with ~100% absorptance at 0.92 THz and 1.74 THz. Meanwhile, absorption bandwidth and intensity can be dynamically tuned by changing Fermi energy level of graphene. Besides, broadband absorption is robust against incident angle. Our design may promote the realization of terahertz switchable and multifunctional metasurfaces.

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“…VO 2 is a strongly correlated electron material which undergoes a first-order IMT at 340 K from a low-temperature monoclinic insulating state to a high-temperature rutile metallic state, accompanied by structural, electrical, and optical changes 1,2 . The potential of IMT along with its sensitivity to external stimuli makes it promising for a variety of applications in resistive memories [3][4][5] , optical switches 6,7 , sensors [8][9][10] , tunable photonic devices 11,12 , brain-inspired and neuromorphic architectures [13][14][15] . We target the sensor application in the frequency range of mm-wave and THz.…”

Section: Introductionmentioning

confidence: 99%

Millimeter- and Terahertz-wave stochastic sensors based on reversible insulator-to-metal transition in vanadium dioxide

Qaderi¹,

Rosca²,

Burla³

et al. 2021

Preprint

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Sensitivity to low-energy photons in phase change materials enables the development of efﬁcient millimeter-wave (mm-wave) and terahertz (THz) detectors. Here, we present the concept of uncooled mm-wave detection based on the sensitivity of IMT threshold voltage to the incident wave by exploiting the characteristics of reversible insulator-to-metal transition (IMT) in Vanadium dioxide (VO2) thin ﬁlm devices. The detection concept is demonstrated through actuation of biased VO2 2-terminal switches encapsulated in a pair of coupled antennas on a Si/SiO2 substrate. We also study the behavior of VO2 switches interrupting coplanar waveguide (CPW)s. Ultimately, we propose an electromagnetic wave-sensitive voltage-controlled spike generator based on the VO2 switches in an astable circuit. The fabricated sensors show record ﬁgs. of merit, such as responsivities of around 66.3 kHz/mW with a low noise equivalent power (NEP) of 20 nW at room temperature, for a footprint of 2.5×10−5 mm2, which can be easily scaled. This solution gives 3 times better responsivity with only 1/10 footprint of the state of the art. However, the footprint is capable of being scaled down to few hundreds of nanometers. The responsivity in static measurements is 76 kV/W in the same circumstances. Based on experimental statistical data measured on robust fabricated devices, we investigate and report stochastic behavior and noise limits of VO2-based spiking sensors that are expected to form a new class of energy efﬁcient transducers. The results highlight the capability of VO2 phase transition to serve for building electromagnetic power sensors, that can be triggered by low energy photons.

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Tunable and scalable broadband metamaterial absorber involving VO₂-based phase transition

Cited by 83 publications

References 38 publications

Ultra-broadband metamaterial absorbers from long to very long infrared regime

Ultra-broadband metamaterial absorbers from long to very long infrared regime

VO₂-Based Switchable Metasurface With Broadband Photonic Spin Hall Effect and Absorption

Millimeter- and Terahertz-wave stochastic sensors based on reversible insulator-to-metal transition in vanadium dioxide

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Tunable and scalable broadband metamaterial absorber involving VO2-based phase transition

Cited by 83 publications

References 38 publications

Ultra-broadband metamaterial absorbers from long to very long infrared regime

Ultra-broadband metamaterial absorbers from long to very long infrared regime

VO2-Based Switchable Metasurface With Broadband Photonic Spin Hall Effect and Absorption

Millimeter- and Terahertz-wave stochastic sensors based on reversible insulator-to-metal transition in vanadium dioxide

Contact Info

Product

Resources

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Tunable and scalable broadband metamaterial absorber involving VO₂-based phase transition

VO₂-Based Switchable Metasurface With Broadband Photonic Spin Hall Effect and Absorption