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Related Experiment Video

Updated: May 29, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

Nonlinear optical processes in optically trapped InP nanowires.

Fan Wang1, Peter J Reece, Suriati Paiman

  • 1School of Physics, The University of New South Wales , Sydney, NSW 2052, Australia.

Nano Letters
|August 31, 2011
PubMed
Summary

We observed nonlinear optical excitation and photoluminescence in suspended indium phosphide (InP) semiconductor nanowires. This confirms nonlinear optical processes and reveals unique spectral features due to band-filling effects.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Optics

Background:

  • Semiconductor nanowires exhibit unique optical properties.
  • Nonlinear optical phenomena are crucial for advanced photonic applications.

Purpose of the Study:

  • To investigate nonlinear optical excitation and photoluminescence in single indium phosphide (InP) nanowires.
  • To explore carrier dynamics and optical processes in InP nanowires under nonlinear excitation.

Main Methods:

  • Utilizing gradient force optical tweezers to trap single InP nanowires in suspension.
  • Employing infrared photon absorption (1.17 eV) for two- and three-photon excitation of free carriers.
  • Conducting power-dependent photoluminescence measurements.
  • Observing second harmonic generation (SHG).

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Last Updated: May 29, 2026

Optical Trapping of Nanoparticles
13:39

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Published on: January 15, 2013

Fabrication and Operation of a Nano-Optical Conveyor Belt
11:10

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

Trapping of Micro Particles in Nanoplasmonic Optical Lattice
07:20

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Main Results:

  • Demonstrated nonlinear optical excitation and photoluminescence in InP nanowires.
  • Confirmed carrier excitation via multi-photon absorption processes.
  • Observed distinct spectral features under nonlinear excitation compared to direct excitation, attributed to band-filling effects.
  • Provided direct evidence of nonlinear optical processes through SHG detection.

Conclusions:

  • Single InP nanowires exhibit significant nonlinear optical behavior.
  • Multi-photon absorption is an effective method for exciting carriers in InP nanowires.
  • Band-filling effects play a key role in the photoluminescence spectra under nonlinear excitation.