Measurement of the longitudinal shift of radiation at total internal reflection by microwave techniques

Akylas, Victor; Kaur, Jasveen; Knasel, T.M.

doi:10.1119/1.10143

Cited by 10 publications

(5 citation statements)

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“…In the total-reflection regime, i.e. for angles of incidence Θ > Θ c = 38.7 • , the results obtained differ somewhat from the predictions of the classical Artman formula [18] apparently confirmed in several experiments like [19][20][21]. This phenomenon has a simple reason: The results of Artman [18] do not consider the beam width.…”

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confidence: 70%

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Nonspecular shifts of microwaves in partial reflection

Müller¹,

Tharanga²,

Stahlhofen³

et al. 2006

Europhys. Lett.

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An experimental study of beam shifts occurring in partial reflection from a planar dielectric interface is presented. A novel Goos-Hänchen-like shift in the regime below total reflection has been found depending on polarization, angle of incidence, and beam width. The shift is accompanied by an angular shift. The results match theoretical predictions based on the theory of moments of light beams.

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confidence: 70%

“…The experiments reported in refs. [19][20][21] all used large beams with ratios of beam width w to wavelengths of the order w/λ 10. In the present experiment, by comparison, these ratios (cf.…”

mentioning

confidence: 99%

Nonspecular shifts of microwaves in partial reflection

Müller¹,

Tharanga²,

Stahlhofen³

et al. 2006

Europhys. Lett.

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“…tudinal or sideways shift of the beam center on which studies of the G~~~-H~~~~~~ by Read et al attention has been focussed. This beam displacement (1) and ~k~l~~ et al (2) and theoretical studies of is like the Goos-Hanchen shift which occurs upon A~~~~ and B~~~~~~ (3) and cowan and ~~i~i~ (4) total internal reflection, in that the beam emerges relating to external reflection are evidence of this from the dielectric interface at a position other than interest.…”

Section: Introductionmentioning

confidence: 90%

“…It is clear from [2] that the electric field vector is assumed to be in the y-direction only, i.e., that the microwaves are polarized outside the horn in the same direction as they are inside. In the above expression the function E(k,) is the Fourier transform of This beam proceeds from the horn and is eventually intercepted by the dielectric slab.…”

Section: Perpendicular Polarizationmentioning

confidence: 99%

Displacement of a microwave beam upon transmission through a dielectric slab

Read¹,

Reesor²

1979

Can. J. Phys.

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Theoretical predictions of the longitudinal displacement of an X-band microwave beam upon transmission through a thin dielectric slab have been made. In this study the incident beam has been considered a s an angular superposition of infinite plane waves grouped around the central eigenwave. The position of the transmitted beam peak has been studied as a function of the angular position of the slab for various slab thicknesses less than several wavelengths thick. The investigation has been carried out for both polarizations using a slab whose index of refraction is 1.63.Des predictions theoriques ont ete fi~ites pour le diplacement longitudinal d'un faisceau de micro-ondes de la bande X lors du passage de ce faisceau i tlxvers une plaque dielectrique mince.Dans cette etude le faisceau incident a etC considere comme une superposition angulaire d'ondes planes infinies groupees autour de I'onde caracteristique centl-ale. La position du maximum du faisceau tl-ansmis a ete etudiee en fonction de la position angulaire de la plaque pour differentes epaisseurs inferieures ;I plusieurs longueurs d'onde. L'etude a e t e faite pour les deux directions de polarisation. en utilisant une plaque dont I'indice de refraction est 1.63.[Traduit par le journal]Can.

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“…The GH effect is a research hotspot due to its profound physical significance and broad application scenarios. It has been studied in various wavebands, including the visible, infrared, terahertz, and microwave wavebands [ 4 , 5 , 6 , 7 ]. It has also been widely used in sensors, optical switches, polarization splitting, and other fields [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Enhancement of the Goos–Hänchen Shift with a Metasurface Based on Bound States in the Continuum

2023

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The enhancement of the Goos–Hänchen (GH) shift has become a research hotspot due to its promoted application of the GH effect in various fields. However, currently, the maximum GH shift is located at the reflectance dip, making it difficult to detect GH shift signals in practical applications. This paper proposes a new metasurface to achieve reflection-type bound states in the continuum (BIC). The GH shift can be significantly enhanced by the quasi-BIC with a high quality factor. The maximum GH shift can reach more than 400 times the resonant wavelength, and the maximum GH shift is located exactly at the reflection peak with unity reflectance, which can be applied to detect the GH shift signal. Finally, the metasurface is used to detect the variation in the refractive index, and the sensitivity can reach 3.58 × 106 μm/RIU (refractive index unit) according to the simulation’s calculations. The findings provide a theoretical basis to prepare a metasurface with high refractive index sensitivity, a large GH shift, and high reflection.

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Measurement of the longitudinal shift of radiation at total internal reflection by microwave techniques

Cited by 10 publications

References 0 publications

Nonspecular shifts of microwaves in partial reflection

Nonspecular shifts of microwaves in partial reflection

Displacement of a microwave beam upon transmission through a dielectric slab

Theoretical Enhancement of the Goos–Hänchen Shift with a Metasurface Based on Bound States in the Continuum

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