Terahertz single pixel imaging with an optically controlled dynamic spatial light modulator.

Journal Article

We present a single pixel terahertz (THz) imaging technique using optical photoexcitation of semiconductors to dynamically and spatially control the electromagnetic properties of a semiconductor mask to collectively form a THz spatial light modulator (SLM). By co-propagating a THz and collimated optical laser beam through a high-resistivity silicon wafer, we are able to modify the THz transmission in real-time. By further encoding a spatial pattern on the optical beam with a digital micro-mirror device (DMD), we may write masks for THz radiation. We use masks of varying complexities ranging from 63 to 1023 pixels and are able to acquire images at speeds up to 1/2 Hz. Our results demonstrate the viability of obtaining real-time and high-fidelity THz images using an optically controlled SLM with a single pixel detector.

Full Text

Duke Authors

Cited Authors

  • Shrekenhamer, D; Watts, CM; Padilla, WJ

Published Date

  • May 2013

Published In

Volume / Issue

  • 21 / 10

Start / End Page

  • 12507 - 12518

PubMed ID

  • 23736469

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.21.012507

Language

  • eng