4.6 Article

Terahertz-field-induced optical luminescence from graphene for imaging and near-field visualization of a terahertz field

Journal

OPTICS LETTERS
Volume 46, Issue 23, Pages 5946-5949

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OL.442904

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Funding

  1. Russian Science Foundation [19-42-04133]
  2. Russian Science Foundation [19-42-04133] Funding Source: Russian Science Foundation

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The study introduces a novel graphene-based terahertz-field-induced optical luminescence (GB-TFIOL) technique for near-field mapping, demonstrating its application in visualizing local terahertz-field enhancement through experimental proof-of-principle.
Graphene-based terahertz (THz)-field-induced optical luminescence (GB-TFIOL) is proposed in this Letter as a novel, to the best of our knowledge, THzimaging technique. We experimentally show that two-dimensional distribution of the optical luminescence from a monolayer graphene traces the beam profile of the pump THz radiation. The atomic thickness of a graphene detector, as well as a strong nonlinear dependence of optical luminescence on THz field, make the GB-TFIOL technique a useful tool for near-field mapping. A proof-of-principle experiment of the visualization of local THz-field enhancement near a metal tip with a 2 mu m radius curvature was performed. (C) 2021 Optical Society of America.

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