Narrow Band Total Absorber at Near-Infrared Wavelengths Using Monolayer Graphene and Sub-Wavelength Grating Based on Critical Coupling

Akhavan, Ali; Abdolhosseini, Saeed; Ghafoorifard, Hassan; Habibiyan, Hamidreza

doi:10.1109/jlt.2018.2876374

Cited by 36 publications

(18 citation statements)

References 38 publications

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“…The power dissipation density of PA is investigated to further explain the mechanism by which α‐MoO 3 absorbs the energy under CC condition at the operation wavelength. The power dissipation density for TM wave is defined as: [ 13 ]

w false(y, z false) = 0.5 ε_{0} ω Im false(ε (y, z) false) {(||, E false(y, z false))}^{2}

where Im( ε ( y , z )) is the imaginary part of permittivity of the constituent material in the structure. | E ( y , z )| is the electric field amplitude along the z direction.…”

Section: Resultsmentioning

confidence: 99%

Critical Coupling and Perfect Absorption Using α‐MoO₃ Multilayers in the Mid‐Infrared

Dong

Liu

2021

Annalen der Physik

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α‐Phase molybdenum trioxide(α‐MoO3) is a biaxial van der Waals semiconductor that can naturally support anisotropic phonon polaritons with elliptic and hyperbolic in‐plane dispersion. α‐MoO3 can meet critical coupling (CC) condition for both transverse magnetic (TM) and transverse electric (TE) polarizations along the x and y directions and exhibit high absorption in the mid‐infrared region due to strong phonon polaritons. In this study, an absorber composed of few‐layer α‐MoO3 and one‐dimensional photonic crystal separated by a cavity is proposed. Perfect absorption for TE and TM polarized light is achieved at the longitudinal and transverse optical phonon frequencies, respectively. The underlying mechanism of perfect absorption is investigated by using coupled mode theory and simulating electric field and power dissipation profiles. The results prove that CC is responsible for the perfect absorption. Moreover, the influence of the thickness of α‐MoO3 layer, width of cavity between α‐MoO3 and photonic crystal, and angle of incident light on the CC and absorption performance are examined. Accordingly, the rules for realizing perfect absorption at different operation frequencies are established. Overall, this study provides useful insights on designing a perfect absorber based on α‐MoO3 for detection and sensing applications in the mid‐infrared region.

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w false(y, z false) = 0.5 ε_{0} ω Im false(ε (y, z) false) {(||, E false(y, z false))}^{2}

where Im( ε ( y , z )) is the imaginary part of permittivity of the constituent material in the structure. | E ( y , z )| is the electric field amplitude along the z direction.…”

Section: Resultsmentioning

confidence: 99%

Critical Coupling and Perfect Absorption Using α‐MoO₃ Multilayers in the Mid‐Infrared

Dong

Liu

2021

Annalen der Physik

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“…When the sensing area increases by 14.5 times, an over 9% increase in absorption was reported [180]. On top of sensing, low dimensional materials such as graphene have been introduced into the nanoplamonic systems for enhancing plasmonic absorbers [181], enhancing nonlinear optical effects [182], tuning plasmon-phonon coupling [183], and enabling plasmonic modulation [184]. Similar technologies can be utilized in guided-wave nanophotonic biochemical sensors by integrating nanoplasmonics on the sensing waveguide and concentrating a high electric field locally in nanoscale to enhance the sensing performance as well as other applications that require strong light-matter interactions.…”

Section: Nanoplasmonics Enhanced Infrared Guided-wave Nanophotonic Bimentioning

confidence: 99%

Progress of infrared guided-wave nanophotonic sensors and devices

Dong

Lee

2020

Nano Convergence

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Nanophotonics, manipulating light-matter interactions at the nanoscale, is an appealing technology for diversified biochemical and physical sensing applications. Guided-wave nanophotonics paves the way to miniaturize the sensors and realize on-chip integration of various photonic components, so as to realize chip-scale sensing systems for the future realization of the Internet of Things which requires the deployment of numerous sensor nodes. Starting from the popular CMOS-compatible silicon nanophotonics in the infrared, many infrared guided-wave nanophotonic sensors have been developed, showing the advantages of high sensitivity, low limit of detection, low crosstalk, strong detection multiplexing capability, immunity to electromagnetic interference, small footprint and low cost. In this review, we provide an overview of the recent progress of research on infrared guided-wave nanophotonic sensors. The sensor configurations, sensing mechanisms, sensing performances, performance improvement strategies, and system integrations are described. Future development directions are also proposed to overcome current technological obstacles toward industrialization.

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“…Recently, numerous near-infrared absorbers using graphene and silicon gratings have been proposed. Akhavan et al designed a graphene absorber, the efficient absorption of light by a graphene sheet was realized by guided mode resonance [8]. Zheng et al designed an absorber with a high absorption efficiency at an incident angle of 0 to 5 degrees by using Fabry-Perot cavity resonance [9].…”

Section: Introductionmentioning

confidence: 99%

Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared

et al. 2021

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In this paper, a tunable absorber composed of asymmetric grating based on a graphene-dielectric-metal structure is proposed. The absorption of the absorber can be modified from 99.99% to 61.73% in the near-infrared by varying the Fermi energy of graphene, and the absorption wavelength can be tuned by varying the grating period. Furthermore, the influence of other geometrical parameters, the incident angle, and polarization are analyzed in detail by a finite-difference time-domain simulation. The graphene absorbers proposed in this paper have potential applications in the fields of stealth, sense, and photoelectric conversion. When the absorber that we propose is used as a gas sensor, the sensitivity of 200 nm/RIU with FOM can reach up to 159 RIU−1.

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Narrow Band Total Absorber at Near-Infrared Wavelengths Using Monolayer Graphene and Sub-Wavelength Grating Based on Critical Coupling

Cited by 36 publications

References 38 publications

Critical Coupling and Perfect Absorption Using α‐MoO₃ Multilayers in the Mid‐Infrared

Critical Coupling and Perfect Absorption Using α‐MoO₃ Multilayers in the Mid‐Infrared

Progress of infrared guided-wave nanophotonic sensors and devices

Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared

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Narrow Band Total Absorber at Near-Infrared Wavelengths Using Monolayer Graphene and Sub-Wavelength Grating Based on Critical Coupling

Cited by 36 publications

References 38 publications

Critical Coupling and Perfect Absorption Using α‐MoO3 Multilayers in the Mid‐Infrared

Critical Coupling and Perfect Absorption Using α‐MoO3 Multilayers in the Mid‐Infrared

Progress of infrared guided-wave nanophotonic sensors and devices

Monolayer-Graphene-Based Tunable Absorber in the Near-Infrared

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Product

Resources

About

Critical Coupling and Perfect Absorption Using α‐MoO₃ Multilayers in the Mid‐Infrared

Critical Coupling and Perfect Absorption Using α‐MoO₃ Multilayers in the Mid‐Infrared