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Optical second-harmonic generation measurement for probing organic device operation.

Takaaki Manaka1, Mitsumasa Iwamoto1

  • 1Department of Physical Electronics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan.

Light, Science & Applications
|September 1, 2018
PubMed
Summary

Electric-field induced optical second-harmonic generation (EFISHG) visualizes electric fields in organic electronics. This technique maps electric fields and probes carrier motion in organic field-effect transistors for device analysis.

Keywords:
electric fieldoptical second-harmonic generationsemiconductor device

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Area of Science:

  • Organic electronics
  • Nonlinear optics
  • Materials science

Background:

  • Organic-based devices exhibit complex behaviors.
  • Understanding electric field distribution is crucial for device performance.
  • Existing methods may lack spatial resolution for detailed analysis.

Purpose of the Study:

  • To provide an overview of the electric-field induced optical second-harmonic generation (EFISHG) technique.
  • To demonstrate EFISHG's capability in evaluating electric field distribution in organic devices.
  • To review applications of EFISHG in organic electronics.

Main Methods:

  • Analysis of EFISHG images of organic field-effect transistors.
  • Evaluation of in-plane two-dimensional electric field distribution.
  • Consideration of susceptibility tensor and incident light polarization.
  • Utilizing time-resolved EFISHG for transient electric field measurements.

Main Results:

  • EFISHG enables evaluation of the vectorial electric field distribution in organic films.
  • Light polarization selection is key for effective EFISHG imaging.
  • Time-resolved EFISHG directly probes carrier motion by measuring electric fields from injected carriers.

Conclusions:

  • EFISHG is a powerful technique for characterizing electric fields in organic electronic devices.
  • It offers insights into carrier dynamics and device operation.
  • The technique has diverse applications in the field of organic electronics.