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Updated: Aug 23, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Recent Progress of Terahertz Spatial Light Modulators: Materials, Principles and Applications.

Shengnan Guan¹, Jierong Cheng^1,2, Shengjiang Chang^1,3

¹Institute of Modern Optics, Nankai University, No. 38 Tongyan Road, Tianjin 300350, China.

|October 27, 2022

Summary

This summary is machine-generated.

Terahertz (THz) spatial light modulators are crucial for advancing THz technology. This review covers recent progress in THz spatial modulation, focusing on functional materials and their applications.

Keywords:

VO2 beam scanning graphene liquid crystal modulation modulation depth modulation rate semiconductor single-pixel imaging terahertz

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Area of Science:

Physics and Engineering
Optics and Photonics
Materials Science

Background:

Terahertz (THz) technology has vast application potential, but lacks efficient modulation devices.
Spatial modulation is key for encoding information into THz wavefronts for applications like imaging and beam scanning.
Existing microwave and optical techniques are not directly scalable to THz frequencies.

Purpose of the Study:

To review recent advancements in Terahertz (THz) spatial light modulators.
To analyze modulation principles, specifications, and applications based on functional materials.
To identify challenges and future prospects for THz spatial modulation.

Main Methods:

Review of literature on THz spatial light modulators.
Analysis of functional materials and their role in THz modulation.
Examination of modulation principles, device specifications, and application areas.

Main Results:

Metasurfaces and novel materials are enabling new possibilities for THz spatial modulation.
Various functional materials are being explored for their unique modulation capabilities.
Progress has been made in understanding modulation principles and device performance.

Conclusions:

THz spatial light modulators are critical for overcoming current technological bottlenecks.
Continued research in functional materials and device design will drive future THz applications.
Significant potential exists for new advances in THz spatial modulation technology.