Publication

Lithium niobate nanowires synthesis, optical properties, and manipulation

Demetri Psaltis, László Forró, Ye Pu, Rachel Grange, Arnaud Magrez, Chia-Lung Hsieh, Ye Pu, Jae-Woo Choi, Rita Smajda
2009
Journal Articles

Abstract

Free-standing lithium niobate nanowires (LiNbO3) are synthesized by the hydrothermal route. The polarization response of the second harmonic generation (SHG) signal is measured in a single nanowire and used to identify the crystal orientation by matching with bulk LiNbO3 nonlinear optical susceptibility. The electrical manipulation of a LiNbO3 nanowire and its monitoring through the SHG signal in a fluidic setup are demonstrated. © 2009 American Institute of Physics.

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https://infoscience.epfl.ch/entities/publication/4c965154-d08e-43d1-8c50-35a1cd4333c5

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Demetri Psaltis, László Forró, Ye Pu, Rachel Grange, Arnaud Magrez, Chia-Lung Hsieh, Ye Pu, Jae-Woo Choi, Rita Smajda
2009
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/4c965154-d08e-43d1-8c50-35a1cd4333c5

About this result

Related concepts (12)

Second-harmonic generation

Second-harmonic generation (SHG, also called frequency doubling) is a nonlinear optical process in which two photons with the same frequency interact with a nonlinear material, are "combined", and generate a new photon with twice the energy of the initial photons (equivalently, twice the frequency and half the wavelength), that conserves the coherence of the excitation. It is a special case of sum-frequency generation (2 photons), and more generally of harmonic generation.

Nonlinear optics

Nonlinear optics (NLO) is the branch of optics that describes the behaviour of light in nonlinear media, that is, media in which the polarization density P responds non-linearly to the electric field E of the light. The non-linearity is typically observed only at very high light intensities (when the electric field of the light is >108 V/m and thus comparable to the atomic electric field of ~1011 V/m) such as those provided by lasers. Above the Schwinger limit, the vacuum itself is expected to become nonlinear.

High harmonic generation

High harmonic generation (HHG) is a non-linear process during which a target (gas, plasma, solid or liquid sample) is illuminated by an intense laser pulse. Under such conditions, the sample will emit the high harmonics of the generation beam (above the fifth harmonic). Due to the coherent nature of the process, high harmonics generation is a prerequisite of attosecond physics. Perturbative harmonic generation is a process whereby laser light of frequency ω and photon energy ħω can be used to generate new frequencies of light.

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