Browsing by Author "Khalichi, Bahram"
Now showing items 1-17 of 17
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Adaptive thermal camouflage using sub-wavelength phase-change metasurfaces
(Institute of Physics Publishing Ltd., 2022-12-09)Sub-wavelength metasurface designs can be used to artificially engineer the spectral thermal signature of an object. The real-time control of this emission can provide the opportunity to switch between radiative cooling ... -
Broadband analysis of multiscale electromagnetic problems: Novel incomplete-leaf MLFMA for potential integral equations
(IEEE, 2021-06-24)Recently introduced incomplete tree structures for the magnetic-field integral equation are modified and used in conjunction with the mixed-form multilevel fast multipole algorithm (MLFMA) to employ a novel broadband ... -
Broadband solutions of potential integral equations with NSPWMLFMA
(IEEE, 2019-06)In this communication, a mixed-form multilevel fast multipole algorithm (MLFMA) is combined with the recently introduced potential integral equations (PIEs), also called as the A-φ system, to obtain an efficient and accurate ... -
Correction to: Active tuning from narrowband to broadband absorbers using a sub-wavelength VO2 embedded layer
(Springer, 2021-02-04)Metamaterial perfect absorbers (MPAs) with dynamic thermal tuning features are able to control the absorption performance of the resonances, providing diverse applications spanning from optical switches and filters to ... -
Diode like high-contrast asymmetric transmission of linearly polarized waves based on plasmon-tunneling effect coupling to electromagnetic radiation modes
(Institute of Physics Publishing Ltd., 2021-06-25)We present a narrow-band optical diode with a high-contrast forward-to-backward ratio at the near-infrared region. The design has a forward transmission of approximately $88\% $, and a backward one of less than $3\% $, ... -
Fano resonance in a dolomite phase-change multilayer design for dynamically tunable omnidirectional monochromatic thermal emission
(Optica, 2022)In this Letter, we unveil the unprecedented optical phonon response of CaMg(CO3)2 (dolomite) thin film in the design of a planar ultra-narrowband mid-infrared (MIR) thermal emitter. Dolomite (DLM) is a carbonate mineral ... -
Fast and efficient solutions of multiscale electromagnetic problems
(Bilkent University, 2020-09)Frequency-domain surface integral equations (SIEs) used together with the method of moments (MoM), and/or its accelerated versions, such as the multilevel fast multipole algorithm (MLFMA), are usually the most promising ... -
Highly one-way electromagnetic wave transmission based on outcoupling of surface plasmon polaritons to radiation modes
(Institute of Electrical and Electronics Engineers, 2022-09-21)Unidirectional transmission of electromagnetic waves has attracted great interest due to its wide modern optical applications. This study theoretically demonstrates a one-way transmissive optical device with a ... -
Mid-infrared adaptive thermal camouflage using a phase-change material coupled dielectric nanoantenna
(Institute of Physics Publishing Ltd., 2021-04-23)Recently, camouflage technology has attracted researchers' attention in a large variety of thermal applications. As a special phase change material (PCM), vanadium dioxide (VO2) is an excellent candidate for the studies ... -
Multi-band light-matter interaction in hBN-based metasurface absorber
(Institute of Electrical and Electronics Engineers, 2022-09-28)This paper presents a multi-band metamaterial-based absorber using phononic two-dimensional (2D) material. The structure consists of a top hexagonal boron nitride (hBN) layer on an aluminum nanograting structure deposited ... -
Nano shell impact on Huygens’ metasurface dipolar resonances and optical response
(Optica, 2021-09)Due to several advantages over conventional devices for the control of electromagnetic (EM) radiation, the demand for metasurface utilization based on artificially engineered micro and nanostructures is boosted, especially ... -
Polarization insensitive phase change material-based nanoantenna array for thermally tunable infrared applications
(Institute of Electrical and Electronics Engineers, 2022-09-21)Thermal radiation management is an emerging application of metamaterials owing to their exotic electromagnetic radiative properties. Herein, a thermally tunable phase change material-based nanoantenna array is reported to ... -
A spectrally selective gap surface-plasmon-based nanoantenna emitter compatible with multiple thermal infrared applications
(Institute of Physics Publishing Ltd., 2021-08-20)Wavelength-selective nanoantenna emitters have attracted considerable attention due to their widespread applications ranging from thermal radiation management to thermophotovoltaics. In this paper, we design a wavelength-selective ... -
A Transmissive all-dielectric metasurface-based nanoantenna array for selectively manipulation of thermal radiation
(Institute of Electrical and Electronics Engineers, 2022-09-21)In this study, a wavelength-selective thermal nanoantenna emitter based on metamaterial design with heat radiation signature management and radiative cooling property is proposed. The design can be considered as a ... -
Uncovering the non-radiative thermal characteristics of a passive radiative cooler under real operating conditions
(Institute of Physics Publishing Ltd., 2022-12-12)Passive radiative cooling (PasRadCool), which emits thermal energy from objects to deep cold space through atmospheric transparency, offers complementary and alternative green energy solutions for passive cooling of ... -
Visible light metasurface for adaptive photodetection
(Institute of Physics Publishing Ltd., 2022-10-05)Semiconductor-based sub-wavelength metasurfaces are promising device platforms for the realization of optically thick and electrically thin photodetectors. Strong light–matter interactions in ultrathin film regions provide ... -
A wavelength-selective multilayer absorber for heat signature control
(Institute of Electrical and Electronics Engineers, 2022-09-28)Engineering the thermal radiation using wavelength-selective thermal emitters is of great importance in the field of thermophotovoltaics, radiative cooling, and heat signature control. In this paper, a wavelength-selective ...
