Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...

Group Polarization

Group Polarization

Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.

Dielectric Polarization in a Capacitor

Dielectric Polarization in a Capacitor

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...

Potential Due to a Polarized Object

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Experimental Verification of a Bigrating Beam Rider.

Physical review letters·2020

Same author

A common-path polarization-based image-inversion interferometer.

Optics express·2019

Same author

Parallel sorting of orbital and spin angular momenta of light in a record large number of channels.

Optics letters·2018

Same author

Hidden Gratings in Holographic Liquid Crystal Polymer-Dispersed Liquid Crystal Films.

ACS applied materials & interfaces·2018

Same author

Beam shaping diffractive wave plates [Invited].

Applied optics·2018

Same author

High contrast switching of transmission due to electrohydrodynamic effect in stacked thin systems of liquid crystals.

Applied optics·2016

Search research articles

Related Experiment Video

Updated: Jun 26, 2026

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Published on: September 8, 2023

Polarization insensitive imaging through polarization gratings.

Sarik R Nersisyan¹, Nelson V Tabiryan, Landa Hoke

¹BEAM Engineering for Advanced Measurements Co., 809 S. Orlando Ave., Suite I, Winter Park, FL 32789, USA.

|February 4, 2009

Summary

This summary is machine-generated.

Combining liquid crystal polarization gratings enables polarization-insensitive imaging and optical switching. Specific arrangements cancel diffraction, preserving beam phase for holographic imaging and broadband applications.

More Related Videos

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Imaging Plasma Membrane Deformations With pTIRFM

Imaging Plasma Membrane Deformations With pTIRFM

Published on: April 2, 2014

Related Experiment Videos

Last Updated: Jun 26, 2026

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Published on: September 8, 2023

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Imaging Plasma Membrane Deformations With pTIRFM

Imaging Plasma Membrane Deformations With pTIRFM

Published on: April 2, 2014

Area of Science:

Optics and Photonics
Materials Science

Background:

Liquid crystal polarization gratings offer high diffraction efficiency in thin layers.
Their potential for advanced optical applications remains an active area of research.

Purpose of the Study:

To investigate the combination of liquid crystal polarization gratings for novel optical applications.
To demonstrate polarization-insensitive imaging and optical switching using paired gratings.

Main Methods:

Utilizing pairs of closely spaced, parallel, and anti-parallel cycloidal polarization gratings.
Fabricating liquid crystal polymer cycloidal gratings with high diffraction efficiency.
Testing combined grating characteristics with UV and red laser wavelengths.

Main Results:

Paired gratings can cancel individual grating diffraction, enabling phase preservation and holographic imaging.
Anti-parallel arrangements broaden the diffraction band and double the diffraction angle.
Achieved broadband diffraction from 480 nm to over 900 nm with 98% efficiency over large areas.

Conclusions:

Combined liquid crystal polarization gratings are effective for polarization-insensitive imaging and optical switching.
The demonstrated broadband and high-efficiency diffraction opens possibilities for advanced optical devices.
The versatility of these gratings supports applications across UV to red wavelengths.