Anomalous Goos-Hänchen shift in the Floquet scattering of Dirac fermions

Huamán, A.; Usaj, Gonzalo

doi:10.1103/physreva.100.033409

Cited by 12 publications

(4 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Goos-Hänchen (GH) shift refers to the lateral spatial shift of the center of mass of the bounded beam relative to the geometric prediction [1]. The GH migration results from the role dispersion of the Fresnel reflection coefficient [2,3]. When the phase of reflection coefficient changes significantly near the critical angle of total reflection, GH effect can be enhanced [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity Goos-Hänchen Shifts Sensor Based on BlueP-TMDCs-Graphene Heterostructure

Han

Pan

et al. 2020

Sensors

View full text Add to dashboard Cite

Surface plasmon resonance (SPR) with two-dimensional (2D) materials is proposed to enhance the sensitivity of sensors. A novel Goos–Hänchen (GH) shift sensing scheme based on blue phosphorene (BlueP)/transition metal dichalogenides (TMDCs) and graphene structure is proposed. The significantly enhanced GH shift is obtained by optimizing the layers of BlueP/TMDCs and graphene. The maximum GH shift of the hybrid structure of Ag-Indium tin oxide (ITO)-BlueP/WS2–graphene is −2361λ with BlueP/WS2 four layers and a graphene monolayer. Furthermore, the GH shift can be positive or negative depending on the layer number of BlueP/TMDCs and graphene. For sensing performance, the highest sensitivity of 2.767 × 107λ/RIU is realized, which is 5152.7 times higher than the traditional Ag-SPR structure, 2470.5 times of Ag-ITO, 2159.2 times of Ag-ITO-BlueP/WS2, and 688.9 times of Ag-ITO–graphene. Therefore, such configuration with GH shift can be used in various chemical, biomedical and optical sensing fields.

show abstract

Section: Introductionmentioning

confidence: 99%

High-Sensitivity Goos-Hänchen Shifts Sensor Based on BlueP-TMDCs-Graphene Heterostructure

Han

Pan

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…Among the obtained results we show that GH shifts in transmission can be controlled by a square potential barrier harmonically oscillating in time. It is worth mentioning that few recent references have considered the GH shifts due to irradiation of graphene sheet with a time-dependent oscillating magnetic field [15]. Others investigated the GH shifts in a strained graphene sheet where the mechanical strain is described by a gauge vector potential giving rise to a pseudo-magnetic field that affected differently the valley [16].…”

mentioning

confidence: 99%

Time-dependent Goos-Hänchen shifts in gapped graphene

Lemaalem¹,

Mekkaoui²,

Jellal³

et al. 2020

EPL

View full text Add to dashboard Cite

We study the Goos-Hänchen (GH) shifts for transmitted Dirac fermions in gapped graphene through a single barrier structure having a time periodic oscillating component. Our analysis shows that the GH shifts in transmission for central band l = 0 and two first sidebands l = ±1 change sign at the Dirac points E = V + l ω. In particular the GH shifts in transmission exhibit enhanced peaks at each bound state associated with the single barrier when the incident angle is less than the critical angle associated with total reflection.

show abstract

“…The SPR reflection spectra of this configuration were theoretically modelled by using the Transfer Matrix Method (TMM) and Fresnel equations. These equations and TMM are known to be used to study multi-layered SPR structures under excitation condition [ 14 ]. In this project, another key novelty is based on the SPR phase singularity-enhanced lateral position shift (Goos-Hänchen (GH) shift) [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Enhancement of Hybrid Two-Dimensional Nanomaterials-Based Surface Plasmon Resonance Biosensor

et al. 2022

View full text Add to dashboard Cite

In this work, we designed structures based on copper nanosubstrate with graphene and two-dimensional transition metal dichalcogenides (TMDC) in order to achieve an ultrasensitive surface plasmon resonance biosensor. This system contains seven components: SF11 triangular prism, BK-7 glass, Chromium (Cr) adhesion layer, thin copper film, layers of one of the types of transition metal dichalcogenides: MoS2, MoSe2, WS2 or WSe2 (defined as MX2), graphene, sensing layer with biomolecular analyte. Copper was chosen as a plasmonic material because it has a higher conductivity than gold which is commonly used in plasmonic sensors. Moreover, copper is a cheap and widespread material that is easy to produce on a large scale. We have carried out both theoretical and numerical sensitivity calculations of these kinds of structures using the Goos–Hänchen (GH) shift method. GH shift is lateral position displacement of the p-polarized reflected beam from a boundary of two media having different indices of refraction under total internal reflection condition and its value can be retrieved from the phase change of the beam. The SPR signal based on the GH shift is much more sensitive compared to other methods, including angular and wavelength scanning, due to much more abrupt phase change of the SPR reflected light than its intensity ones. By optimizing the parameters of the SPR sensing substrate, such as thickness of copper, number of layers of 2D materials and excitation wavelength, we theoretically showed an enhanced sensitivity with a detection limit 10−9 refractive index unit (RIU).

show abstract

Anomalous Goos-Hänchen shift in the Floquet scattering of Dirac fermions

Cited by 12 publications

References 61 publications

High-Sensitivity Goos-Hänchen Shifts Sensor Based on BlueP-TMDCs-Graphene Heterostructure

High-Sensitivity Goos-Hänchen Shifts Sensor Based on BlueP-TMDCs-Graphene Heterostructure

Time-dependent Goos-Hänchen shifts in gapped graphene

Sensitivity Enhancement of Hybrid Two-Dimensional Nanomaterials-Based Surface Plasmon Resonance Biosensor

Contact Info

Product

Resources

About