Related Experiment Video
Updated: Jan 4, 2026
09:25
Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
10.0K
Tunable in-plane and transverse spin angular shifts in layered dielectric structure
Optics Express
|November 6, 2019
Summary
Researchers developed a new method to control angular shifts in the photonic spin Hall effect (SHE) using layered structures. This technique allows for tunable spin-dependent angular shifts in light beams.
Area of Science:
- Optics and Photonics
- Quantum Optics
- Condensed Matter Physics
Background:
- The photonic spin Hall effect (SHE) is characterized by spin-dependent spatial and angular shifts of light.
- Existing methods effectively control spatial shifts but lack precise manipulation of angular shifts.
Purpose of the Study:
- To propose and theoretically investigate a novel method for controlling spin angular shifts in photonic SHE.
- To explore the tunability of these shifts using a layered structure interface.
Main Methods:
- Theoretical derivation of general expressions for in-plane and transverse spin angular shifts.
- Analysis of light beam reflection at an air-layered structure interface.
- Investigation of the influence of structure parameters and incident polarization states.
Main Results:
- Spin angular shifts can be effectively regulated by adjusting layered structure parameters, allowing amplification, suppression, and sign switching.
- In-plane angular shifts can transition between spin-independent and spin-dependent states based on incident beam polarization.
- A near-zero reflection angle, analogous to the Brewster angle, enables exploration of large spin angular shifts for vertically polarized incident beams.
Conclusions:
- The proposed method offers a simple and effective way to manipulate spin angular shifts in photonic SHE.
- This control is achieved by tuning the parameters of the air-layered structure.
- The findings open avenues for advanced optical devices and manipulation of light polarization.
More Related Videos
Related Concept Videos
01:31Dielectric Polarization in a Capacitor
5.8K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
5.8K
01:27Electrostatic Boundary Conditions in Dielectrics
1.8K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
1.8K
01:12Transformation of Plane Strain
463
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
463
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.4K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.4K
01:27π Electron Effects on Chemical Shift: Overview
1.5K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.5K