scholarly journals Dual broadband infrared absorptance enhanced by magnetic polaritons using graphene-covered compound metal gratings

2019 ◽  
Vol 27 (21) ◽  
pp. 30182 ◽  
Author(s):  
Nghia Nguyen-Huu ◽  
Jaromir Pistora ◽  
Michael Cada
Keyword(s):  
Magnetic Polaritons ◽  
Metal Gratings

scholarly journals Experimental Demonstration of the Effect of Magnetic Polaritons on the Radiative Properties of Deep Aluminum Gratings

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Peiyan Yang ◽  
Hong Ye ◽  
Zhuomin M. Zhang
Keyword(s):  
Periodic Structures ◽  
Coupling Effect ◽  
Incidence Angle ◽  
Infrared Region ◽  
Radiative Properties ◽  
Future Design ◽  
Specular Reflectance ◽  
Magnetic Polaritons ◽  
Rigorous Coupled Wave ◽  
Metal Gratings

Despite the abundant theoretical studies of magnetic polaritons (MPs) in tailoring the radiative properties of nanostructures, experimental investigation of MPs in deep metal gratings is still lacking. This work experimentally demonstrates the excitation of MP from several microfabricated aluminum gratings in the mid-infrared region by measuring the specular reflectance (zeroth-order diffraction) of the specimen using a Fourier-transform infrared (FTIR) spectrometer. The rigorous coupled-wave analysis (RCWA) and an LC-circuit model are employed to elucidate the mechanism of various resonant modes and their coupling effect. The influence of incidence angle, plane of incidence, polarization, and the trench depth on the spectral reflectance is also discussed. Moreover, the MP dispersion for off-plane layout has been investigated and demonstrated for the first time. The insight gained from this work may facilitate future design and applications of subwavelength periodic structures with desired radiative properties.

Properties of One-Dimensional Metal Gratings at Inclined Incidence of Terahertz Radiation

2020 ◽  
Author(s):  
Mikhail Dzyubenko ◽  
Sergey Masalov ◽  
Yuriy Kamenev ◽  
Ivan Kolenov ◽  
Viktor Pelipenko ◽  
...  
Keyword(s):  
Terahertz Radiation ◽  
One Dimensional ◽  
Metal Gratings

scholarly journals Terahertz characterization of two-dimensional low-conductive layers enabled by metal gratings

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Prashanth Gopalan ◽  
Yunshan Wang ◽  
Berardi Sensale-Rodriguez
Keyword(s):  
Optical Transmission ◽  
Terahertz Spectroscopy ◽  
Design Guidelines ◽  
Two Dimensional ◽  
Highly Sensitive ◽  
Transmission Measurements ◽  
Metal Gratings ◽  
Low Sensitivity ◽  
Non Destructive

AbstractWhile terahertz spectroscopy can provide valuable information regarding the charge transport properties in semiconductors, its application for the characterization of low-conductive two-dimensional layers, i.e., σs <  < 1 mS, remains elusive. This is primarily due to the low sensitivity of direct transmission measurements to such small sheet conductivity levels. In this work, we discuss harnessing the extraordinary optical transmission through gratings consisting of metallic stripes to characterize such low-conductive two-dimensional layers. We analyze the geometric tradeoffs in these structures and provide physical insights, ultimately leading to general design guidelines for experiments enabling non-contact, non-destructive, highly sensitive characterization of such layers.

Magnetic polaritons in Fibonacci quasicrystals

2000 ◽  
Vol 277 (3-4) ◽  
pp. 405-414 ◽  
Author(s):  
E.L Albuquerque ◽  
E.S Guimarães
Keyword(s):  
Magnetic Polaritons

The enhanced terahertz absorption of metal gratings/Si-based blocked-impurity-band (BIB) hybrid structures

2021 ◽  
Vol 53 (11) ◽  
Author(s):  
Wulin Tong ◽  
Yulu Chen ◽  
Lin Wang ◽  
Bingbing Wang ◽  
Wanlong Guo ◽  
...  
Keyword(s):  
Impurity Band ◽  
Hybrid Structures ◽  
Terahertz Absorption ◽  
Metal Gratings

scholarly journals Magnetic polaritons in metamagnet layered structures: Spectra and localization properties

2008 ◽  
Vol 372 (7) ◽  
pp. 1135-1140 ◽  
Author(s):  
C.A.A. Araújo ◽  
E.L. Albuquerque ◽  
D.H.A.L. Anselmo ◽  
M.S. Vasconcelos
Keyword(s):  
Layered Structures ◽  
Magnetic Polaritons

Magnetic Superlattice: Localized Magnetostatic Waves and Magnetic Polaritons

2003 ◽  
Vol 17 (15) ◽  
pp. 829-839
Author(s):  
R. T. Tagiyeva ◽  
M. Saglam
Keyword(s):  
Magnetic Material ◽  
Electromagnetic Wave ◽  
Dispersion Relation ◽  
Wave Theory ◽  
Frequency Region ◽  
Long Wavelength ◽  
Magnetostatic Waves ◽  
General Dispersion ◽  
Magnetic Polaritons ◽  
Magnetic Superlattice

Localized magnetostatic waves and magnetic polaritons at the junction of the magnetic material and magnetic superlattice composed of the alternating ferromagnetic or ferromagnetic and nonmagnetic layers are investigated in the framework of the electromagnetic wave theory in Voigt geometry. The general dispersion relation for localized magnetic polaritons and magnetostatic waves (MW) are derived in the long-wavelength limit. The dispersion curves and frequency region of the exsistence of the localized MW and magnetic polaritons are calculated numerically.

Calculations of Bulk and Surface Magnetic Polaritons in Modulated Antiferromagnetic / Non-Magnetic Superlattices

1993 ◽  
Vol 313 ◽  
Author(s):  
Fred Lacy ◽  
Ernest L. Carter ◽  
Steven L. Richardson
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Spin Waves ◽  
Theoretical Research ◽  
Relative Thickness ◽  
Magnetic Superlattices ◽  
Magnetic Spin ◽  
Magnetic Polaritons

ABSTRACTRecent advances in molecular beam epitaxy have renewed research on the physics of artificially structured magnetic superlattices. In particular, there has been much theoretical research on the propagation of magnetic spin waves or magnetic polaritons in magnetic superlattices.1 In this work, we have studied the effect of modulating both the period of an antiferromagnetic/non-Magnetic semi-infinite superlattice and the relative thickness of its individual layers to see how the dispersion relationships co (k) for bulk and surface magnetic polaritons are effected. We have also calculated the effect of an external magnetic field on (u (k) and our calculation goes beyond the magnetostatic approximation by taking retardation effects into account.

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