Observation of giant Goos-Hänchen and angular shifts at designed metasurfaces

Yallapragada, Venkata Jayasurya; Ravishankar, Ajith P.; Mulay, Gajendra; Agarwal, G. S.; Achanta, Venu Gopal

doi:10.1038/srep19319

Cited by 62 publications

(16 citation statements)

References 36 publications

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“…For incidence in the Brewster region, we have for TM waves a

k {normalw}_{0}

relative factor of the angular deviation with respect to the TE case. This is responsible for what is known in the literature as the giant Goos‐Hänchen angular shift . Analytic expression similar to Eq.…”

Section: Analytical Expressions For the Angular Deviationsmentioning

confidence: 92%

Optimizing Weak Measurements to Detect Angular Deviations

Araújo

Maia

2017

Annalen der Physik

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Optimizing weak measurements to detect angular deviationsW e analyze and compare the angular deviations for an optical beam reflected by and transmitted through a dielectric triangular prism. The analytic expressions derived for the angular deviations hold for arbitrary incidence angles. For incidence approaching the internal and external Brewster angles, the angular deviations transverse magnetic waves present the same behavior leading to the well-known giant Goos-Hänchen angular shift. For incidence near the critical angle a new region of large shift is seen both for transverse magnetic and transverse electric waves. While a direct measuring procedure is better in the vicinity of the Brewster region, a weak measurement breaks off the giant Goos-Hänchen effect, preserving the amplification in the critical region. We discuss under which conditions it is possible to optimize the amplification and we also determine when a weak measurement is preferred to a direct measuring procedure.

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“…For incidence in the Brewster region, we have for TM waves a

k {normalw}_{0}

Section: Analytical Expressions For the Angular Deviationsmentioning

confidence: 92%

Optimizing Weak Measurements to Detect Angular Deviations

Araújo

Maia

2017

Annalen der Physik

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“…As explained in Yallapragada et al . 21 the phase variation leads to the spatial GH shift where the energy is displaced along the surface. A gradient in the magnitude of the reflectivity leads to a change in the mean angle of reflection.…”

Section: Methodsmentioning

confidence: 99%

Application of confocal surface wave microscope to self-calibrated attenuation coefficient measurement by Goos-Hänchen phase shift modulation

Pechprasarn

Chow

Somekh

2018

Sci Rep

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In this paper, we present a direct method to measure surface wave attenuation arising from both ohmic and coupling losses using our recently developed phase spatial light modulator (phase-SLM) based confocal surface plasmon microscope. The measurement is carried out in the far-field using a phase-SLM to impose an artificial surface wave phase profile in the back focal plane (BFP) of a microscope objective. In other words, we effectively provide an artificially engineered backward surface wave by modulating the Goos Hänchen (GH) phase shift of the surface wave. Such waves with opposing phase and group velocities are well known in acoustics and electromagnetic metamaterials but usually require structured or layered surfaces, here the effective wave is produced externally in the microscope illumination path. Key features of the technique developed here are that it (i) is self-calibrating and (ii) can distinguish between attenuation arising from ohmic loss (k″Ω) and coupling (reradiation) loss (k″c). This latter feature has not been achieved with existing methods. In addition to providing a unique measurement the measurement occurs of over a localized region of a few microns. The results were then validated against the surface plasmons (SP) dip measurement in the BFP and a theoretical model based on a simplified Green’s function.

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“…Yallapragada et al reported the observation of giant GH and angular shift on polymethyl methacrylate grating metasurfaces attached on the upper side of metal. The condition of incident light in this article is from air to metal, which is quite different from the conventional cases of total internal reflection [19] . Farmani et al focused on the tunable GH shift based on the graphene contained metasurfaces, and they achieved pretty good gains [20,21] .…”

mentioning

confidence: 91%

Goos–H?nchen shifts in reflective phase-gradient-produced metasurfaces

Shi

Qian

et al. 2018

Chin. Opt. Lett.

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We studied Goos-Hänchen (GH) shifts on a reflective phase-gradient-produced metasurface. Their analytical solutions were achieved for both TE and TM polarizations utilizing the generalized Snell's law. The calculated results show that the GH shifts are evidently affected by phase gradients and incident angles, which means that a certain range of GH shifts can be realized as long as an incident angle, phase gradient, and frequency are properly chosen. This offers an effective method for the control of GH shifts.

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Observation of giant Goos-Hänchen and angular shifts at designed metasurfaces

Cited by 62 publications

References 36 publications

Optimizing Weak Measurements to Detect Angular Deviations

Optimizing Weak Measurements to Detect Angular Deviations

Application of confocal surface wave microscope to self-calibrated attenuation coefficient measurement by Goos-Hänchen phase shift modulation

Goos–H?nchen shifts in reflective phase-gradient-produced metasurfaces

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