Related Experiment Video
Updated: Nov 10, 2025
09:33
Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
6.5K
Generalized Brewster effect using bianisotropic metasurfaces
Optics Express
|April 6, 2021
Summary
A novel bianisotropic metasurface enables reflectionless transmission at any angle for both TM and TE polarizations. This breakthrough in optical technology offers subwavelength matching solutions for mismatched media.
Area of Science:
- Metamaterials and Nanophotonics
- Electromagnetics and Optics
Background:
- Metasurfaces offer unique electromagnetic properties.
- Achieving polarization-independent and angle-independent optical phenomena is challenging.
Purpose of the Study:
- To demonstrate a bianisotropic metasurface for Brewster transmission.
- To achieve polarization-independent and azimuth-independent reflectionless operation.
Main Methods:
- Rigorous derivation of surface susceptibility tensors using generalized sheet transition conditions.
- Full-wave simulations of planar microwave metasurfaces.
Main Results:
- Bianisotropic metasurfaces enable Brewster (reflectionless) transmission at arbitrary angles for TM and TE polarizations.
- The metasurfaces provide deeply subwavelength impedance matching for mismatched media.
- Demonstrated polarization-independent and azimuth-independent operation.
Conclusions:
- The generalized Brewster effect is a fundamental advance in optical technology.
- The proposed metasurfaces can enhance conventional optical components and enable novel devices.
Related Concept Videos
01:15Unsymmetric Bending - Angle of Neutral Axis
606
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
606
01:16Bending of Curved Members - Neutral Surface
334
In curved beams, unlike straight beams, the stress distribution across the cross-section is not uniform due to the beam's curvature. This non-uniformity arises because the neutral axis, where stress is zero, does not align with the centroid of the section. In a curved beam, the strain varies along the section as a function of the distance from the neutral axis.
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within the...
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within the...
334
01:18Unsymmetric Bending
604
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
604
02:18Fischer Projections
15.2K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
15.2K
01:12Transformation of Plane Strain
331
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...
331
01:27Gauss's Law: Planar Symmetry
8.9K
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
8.9K