Optically controlled terahertz beam steering and imaging

Stefan Busch, Benedikt Scherger, Maik A Scheller, Martin Koch

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

We propose a spatial modulator for terahertz waves based on light induced electron plasma in photo-active semiconductors. A two-dimensional array of computer controlled light is used to create free carries in bulk silicon, which results in a spatial modulation of the transmission at terahertz frequencies. This method not only exhibits a remarkable modulation depth over a broad frequency range but also allows for an optically controlled beam steering of terahertz waves by inducing virtual grating structures. In addition, we analyze the possibility of all-optically controlled terahertz imaging.

Original languageEnglish (US)
Pages (from-to)1391-1393
Number of pages3
JournalOptics Letters
Volume37
Issue number8
DOIs
StatePublished - Apr 15 2012

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beam steering
modulation
electron plasma
modulators
frequency ranges
gratings
silicon

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Optically controlled terahertz beam steering and imaging. / Busch, Stefan; Scherger, Benedikt; Scheller, Maik A; Koch, Martin.

In: Optics Letters, Vol. 37, No. 8, 15.04.2012, p. 1391-1393.

Research output: Contribution to journalArticle

Busch, Stefan ; Scherger, Benedikt ; Scheller, Maik A ; Koch, Martin. / Optically controlled terahertz beam steering and imaging. In: Optics Letters. 2012 ; Vol. 37, No. 8. pp. 1391-1393.
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