Beam Shift Modulation Based on Larmor Resonance in Graphene–VO₂ Photonic Crystal

Abstract

A new method to enhance the beam shift of Goos-Hänchen (GH) effect in a 1D photonic crystal based on Larmor resonance in terahertz (THz) region is proposed. Larmor resonance can enhance the surface plasmon resonance (SPR) effect, which enhances the GH effect. A 1D photonic crystal with a graphene-VO 2 periodic structure is designed. As a result of different states at different temperatures, the SPR effect of graphene-VO 2 periodic structure photonic crystals will change. In this structure, Larmor resonance caused by a strong magnetic field perpendicular to the incident surface will resonate with surface plasmons. It is found that the strength of the magnetic field required to enhance SPR is relative to the frequency of electromagnetic waves and the Fermi level. The enhancement of the GH effect by the Larmor resonance theory provides a new way for us to measure strong magnetic fields.

An Interesting Functional Phase Change Material VO2: Response to Multivariate Control and Extensive Applications in Optics and Electronics

“…In 2022, Zhang et al. [ 104] demonstrated a VO 2 based micro‐pillar array coated with chromium or Au/SiO 2 layer, as shown in the Figure 12c–f, the input voltage to the solenoid generates an magnetic field H, H⊥ component causes in‐plane eddy current, and the Joule heating generated by the flowing eddy current rapidly raises the temperature of the VO 2 layer above T C , resulting in MIT in the VO 2 layer, realizing a new pathway of VO 2 phase modulation. In addition, this remote control of the electromagnetic field enables the directional transport of SiO 2 particles in liquid media by the α VPA operating surface.…”

Temperature controllable Goos–Hänchen shift and high reflectance of monolayer graphene induced by BK7 glass grating

“…where DT is the variation of temperature. The initial refractive index (n 0 ) and initial thickness and a = ´ -0.55 10 C, 6 / respectively. Considering the fact that the thermo-optical coefficient is very small, the refractive index of BK7 glass is basically not affected by the temperature and we keep it as a constant, i.e.…”

“…Goos-Hänchen (GH) shift refers to the optical phenomenon in which the reflected beam has a lateral displacement with respect to the incident beam when the beam is reflected at the interface between two different media [1][2][3]. Its manipulation is essential in the fundamental optoelectronic applications and the substantial efforts have been made towards this direction by using the candidates with electrical or magnetic field dependent optical properties [4][5][6][7][8][9][10][11][12]. For example, Luo et al proposed a scheme to tune the GH shift in the metal-insulator-semiconductor structure by an external voltage bias [13].…”

Giant goos–hanchen shift with heigh reflection base on guided mode resonance in trapezoidal hBN/dielectric metasurface

“…Numerous endeavors have focused on improving and refining the fluctuations related to the GH shift. These efforts involve a variety of interesting structures, including metals [11], photonic crystals [12], and metamaterials [13]. Wang et al explored the lateral shift of a light beam reflecting from a dielectric slab backed by a metal [14].…”