Fabrication of polaritonic structures in LiNbO3 and LiTaO3 using femtosecond laser machining

Ward, David W.; Statz, Eric; Nelson, Keith A.

doi:10.1007/s00339-006-3721-y

Cited by 42 publications

(33 citation statements)

References 14 publications

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“…Rectangular LN waveguides were fabricated in two 50-µm thick x-cut slabs of LN crystal through femtosecond laser machining of air trenches along unmachined crystalline waveguides [7]. In each case, one side of the waveguide was an original edge of the LN slab while the other side was formed through removal of crystalline material.…”

Section: Methodsmentioning

confidence: 99%

“…The confinement of polaritons with in sub-wavelength structures allows guidance and in some cases simplification of the THz waveform. THz polariton behavior in Phonon-Polariton Excitation 15 slab and rectangular waveguides, Y-couplers and interferometers, resonators, focusing elements, and other structures, with micron-scale features that are fabricated though femtosecond laser machining [6,7], has been studied. Here we explore a more refined functionality, namely energy transfer between two coupled rectangular waveguides.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phonon-Polariton Excitation in Coupled Ferroelectric Waveguides

Statz

Nelson

2007

Integrated Ferroelectrics

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phonon-Polariton Excitation in Coupled Ferroelectric Waveguides

Statz

Nelson

2007

Integrated Ferroelectrics

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“…Although fs-laser micromachining of LiTaO 3 has been realized [22], and the nonlinear optical properties have been investigated [23], the guiding properties of LiTaO 3 waveguides have not been reported until now.…”

Section: Rapidmentioning

confidence: 99%

Femtosecond laser micromachined optical waveguides in LiTaO₃ crystal

Xu¹,

He²,

Sun³

et al. 2013

Physica Rapid Research Ltrs

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By using femtosecond laser micromachining, optical wave guides in both depressed cladding and dual‐line configurations have been produced in LiTaO3 crystal. The guiding properties and the thermal stability have been investigated for both geometries, which exhibit different performance. Depressed cladding waveguides support guidance along both extraordinary and ordinary index polarizations, while dual‐line waveguides support only extraordinary index polarization. Thermal annealing has been proved to be an effective method to reduce the propagation losses. For the cladding waveguide, the lowest propagation loss was as low as 0.38 dB/cm after the annealing treatment at 400 °C. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…For example, optical waveguides [2], resonators, modulators [3], and photonic crystals [4] are important applications, but also polaritonic devices may be produced [5]. Therefore, patterning techniques which allow for precise structuring of lithium niobate surfaces and thin films are in high demand.…”

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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Fabrication of polaritonic structures in LiNbO3 and LiTaO3 using femtosecond laser machining

Cited by 42 publications

References 14 publications

Phonon-Polariton Excitation in Coupled Ferroelectric Waveguides

Phonon-Polariton Excitation in Coupled Ferroelectric Waveguides

Femtosecond laser micromachined optical waveguides in LiTaO₃ crystal

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

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Fabrication of polaritonic structures in LiNbO3 and LiTaO3 using femtosecond laser machining

Cited by 42 publications

References 14 publications

Phonon-Polariton Excitation in Coupled Ferroelectric Waveguides

Phonon-Polariton Excitation in Coupled Ferroelectric Waveguides

Femtosecond laser micromachined optical waveguides in LiTaO3 crystal

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

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Femtosecond laser micromachined optical waveguides in LiTaO₃ crystal