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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.

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Related Experiment Video

Updated: May 20, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

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Efficient and monolithic polarization conversion system based on a polarization grating.

Jihwan Kim¹, Ravi K Komanduri, Kristopher F Lawler

¹Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA.

|July 12, 2012

Summary

This summary is machine-generated.

We developed a new polarization conversion system (PCS) using a liquid-crystal polarization grating (PG) and louvered wave plate. This compact device efficiently converts unpolarized light to polarized light, enabling energy-efficient picoprojectors with high efficacy.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Polarization conversion is crucial for advanced optical systems.
Existing methods can be bulky or inefficient.

Purpose of the Study:

To develop a compact and efficient polarization conversion system (PCS).
To demonstrate its application in energy-efficient picoprojectors.

Main Methods:

Utilizing a liquid-crystal polarization grating (PG) and a louvered wave plate.
Integrating these components between microlens arrays into a monolithic element.

Main Results:

Achieved nearly complete conversion of unpolarized to polarized light across the visible spectrum.
Demonstrated a PG-PCS with nearly 90% conversion efficiency for ±11° input divergence.
Developed picoprojectors with high efficacy (12 lm/W) and good color uniformity.

Conclusions:

The novel PG-PCS offers a compact, efficient solution for polarization conversion.
This technology enables high-performance, energy-efficient picoprojectors.