Threshold fluence for domain reversal directly induced by femtosecond laser in lithium niobate

Lao, Huiying; Zhu, Hai; Chen, Xianfeng

doi:10.1007/s00339-010-5823-9

Cited by 10 publications

(5 citation statements)

References 21 publications

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“…30 According to their theory the strong electric field of ultrashort pulses may accelerate ions in ferroelectric crystal increasing their kinetic energy such that they would be able to switch between their two stable positions and subsequently flip the direction of spontaneous polarization. Lao et al paper 31 claims experimental confirmation of this process. However, no systematic studies of inverted domain structure had been presented in that work.…”

mentioning

confidence: 56%

Ferroelectric domain engineering by focused infrared femtosecond pulses

Chen

Karpinski

Shvedov

et al. 2015

Applied Physics Letters

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We demonstrate infrared femtosecond laser-induced inversion of ferroelectric domains. This process can be realised solely by using tightly focused laser pulses without application of any electric field prior to, in conjunction with, or subsequent to the laser irradiation. As most ferroelectric crystals like LiNbO3, LiTaO3, and KTiOPO4 are transparent in the infrared, this optical poling method allows one to form ferroelectric domain patterns much deeper inside a ferroelectric crystal than by using ultraviolet light and hence can be used to fabricate practical devices. We also propose in situ diagnostics of the ferroelectric domain inversion process by monitoring the Čerenkov second harmonic signal, which is sensitive to the appearance of ferroelectric domain walls.

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mentioning

confidence: 56%

Ferroelectric domain engineering by focused infrared femtosecond pulses

Chen

Karpinski

Shvedov

et al. 2015

Applied Physics Letters

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“…Later, it was discovered that the inversion of the ferroelectric domain only happens under a certain intensity of laser light, and the concept of domain reversion window was proposed [102]. It is an energy range of a continuous laser pulse that can induce domain inversion, which has been theoretically and experimentally confirmed [103]. However, there was no systematic study of the inverted structure in either Ref.…”

Section: χ (2) -Poling Technique By Femtosecond Lasermentioning

confidence: 99%

A Brief Review on Nonlinear Photonic Crystals Induced by Direct Femtosecond Laser Writing

Tian

Yan

et al. 2023

Photonics

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Direct femtosecond laser writing or inscription is a useful technique, and it has been employed to engineer various materials in many applications including nonlinear photonic crystals, which are of periodically patterned second-order nonlinearity to get and control the coherent light at new frequencies. By manipulation of second-order nonlinearity, either erased or poled, quasi-phase matching has been achieved in several crystals, especially three-dimensional nonlinear photonic crystals have been originally proposed and proved to be truly three-dimensional. Here we shortly review on the recent advances in the research field of nonlinear photonic crystals inscribed by femtosecond laser, as well as look into the future in this field.

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“…Focused ion beam etching allows for the manufacture of nanoscale structures, but is inherently very slow [4]. Alternatively, laser processing has emerged as a structuring method [3,5,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Micrometer-size patterns were formed by mask-projection using 248-nm nanosecond-pulsed KrF laser light [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…The ripples were roughly 100 nm in width and appeared at a periodicity of approximately 200 nm. Polling of the lithium niobate crystals by femtosecond laser light was accomplished on the scale of micrometers [19]. Using high-repetition rate 130-fs Ti:Sapphire laser light at 20 nJ pulse energy ablated regions of more than 10 µm in size were obtained [20].…”

Section: Introductionmentioning

confidence: 99%

Nanostructure formation on lithium niobate surfaces by high-repetition rate sub-15-fs near-infrared laser pulses

2012

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Due to its electro-optical, acousto-optical, ferroelectric, piezoelectric and nonlinear-optical properties lithium niobate is a material of high technological relevance. Thus, patterning of LiNbO 3 surfaces by laser light may significantly influence the performance of micro-optical devices made of this material. Here, we report on the generation of self-organized nanostructures on surfaces of unpoled LiNbO 3 crystals using tightly focused sub-15 fs pulsed Ti:Sapphire laser light (centre wavelength 800 nm, bandwidth 120 nm, repetition rate 85 MHz) at sub-nanojoule pulse energies. With the LiNbO 3 surface immersed in oil intensities close to the ablation threshold resulted in the formation of shallow ripples of 5 -25 nm in height appearing at a periodicity of approximately 220 nm. The ripples were generated by local melting and resolidification of LiNbO 3 involving minor admixture of hydrocarbons. At intensities well beyond the ablation threshold the LiNbO 3 surfaces were patterned densely with tiny cones of 100 -500 nm in height featuring diameters of a few hundred nanometers. Moreover, lines scanned inside the LiNbO 3 crystals resulted in refractive index changes along the laser traces. In contrast, with the LiNbO 3 surface in air or water, ablation was not observed even at prolonged exposure due to aberrations of the focal spot.

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Threshold fluence for domain reversal directly induced by femtosecond laser in lithium niobate

Cited by 10 publications

References 21 publications

Ferroelectric domain engineering by focused infrared femtosecond pulses

Ferroelectric domain engineering by focused infrared femtosecond pulses

A Brief Review on Nonlinear Photonic Crystals Induced by Direct Femtosecond Laser Writing

Nanostructure formation on lithium niobate surfaces by high-repetition rate sub-15-fs near-infrared laser pulses

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