The impact of finite-depth cylindrical and conical holes in lithium niobate photonic crystals

Burr, Geoffrey W.; Diziain, Séverine; Bernal, María

doi:10.1364/oe.16.006302

Cited by 56 publications

(31 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5) corresponding to an aspect ratio close to 8. This range of aspect ratio is well-suited for the fabrication of advanced optical components like photonic crystal structures, upon further downscaling [15,16].…”

Section: Resultsmentioning

confidence: 99%

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

et al. 2018

View full text Add to dashboard Cite

Single-shot Gaussian-Bessel laser beams of 1 ps pulse duration and of ~ 0.9 μm core size and ~ 60 μm depth of focus are used for drilling micro-channels on front side of fused silica in ambient condition. Channels ablated at different pulse energies are fully characterized by AFM and post-processing polishing procedures. We identify experimental energy conditions (typically 1.5 µJ) suitable to fabricate non-tapered channels with mean diameter of ~ 1.2 µm and length of ~ 40 μm while maintaining an utmost quality of the front opening of the channels. In addition, by further applying accurate post-polishing procedure, channels with high surface quality and moderate aspect ratio down to a few units are accessible, which would find interest in the surface micro-structuring of materials, with perspective of further scalability to meta-material specifications.

show abstract

Section: Resultsmentioning

confidence: 99%

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

et al. 2018

View full text Add to dashboard Cite

show abstract

“…1 shows the schematic of the cross section of the special structure. To satisfy the requirement by the PC device fabrication (The mode field should be shallow as soon as possible so as to match with the attainable drilling depth of holes [4]. ), the shorter diffusion duration was adopted here.…”

Section: A Waveguide Fabricationmentioning

confidence: 99%

Notice of Retraction: A Theoretical Study on Special Ti:LiNbO$_{3}$ Structure of an Array of Strip Waveguides Embedded in a Planar Waveguide

Zhang

Hua

et al. 2012

J. Lightwave Technol.

View full text Add to dashboard Cite

A theoretical study was performed on waveguiding characteristics of a special Ti:LiNbO structure that an array of strip waveguides is embedded in a planar waveguide. First, a special Ti:LiNbO structure was fabricated by diffusion of homogeneously coated Ti film at first and then photolithographically patterned Ti-strips with different widths of 4, 5, 6, 7, and 8 m, and the transverse magnetic (TM) mode guided in the strip waveguides of the special structure was characterized by near-field measurements. Second, a 2-D refractive index profile is supposed for the special structure. Third, based upon this supposed index profile model and the experimentally determined mode field profile type, the mode sizes of the strip waveguides were calculated using variational method and compared with the experimental results to verify the validity of the index model supposed and the numerical method adopted. Finally, the mode sizes and effective indexes of several lowest order TM modes guided in the strip waveguides were calculated as a function of the initial Ti-strip width for different waveguide parameters that include the surface index increment and depth (width) of both the planar and strip waveguides. The numerical results show that the field profile in the width direction is influenced by many factors such as the initial Ti-strip width, waveguide width and depth, and the surface index increment of the strip waveguide. Instead, the mode field in the depth direction is only influenced by three factors that include the depth of strip waveguide and the surface index increments of both planar and strip waveguides. The single-mode condition depends on all of these parameters.Index Terms-Mode index, mode size, Ti:LiNbO waveguide.

show abstract

“…PhC structures in LiNbO 3 are of great interest because they offer a possibility to build very small electro-optical modulators and switches. In the past, most of the studies on PhCs in LiNbO 3 have been performed using annealed proton exchange waveguides with a weak optical guiding [11][12][13][14] . However, the development of high-quality PhC structures requires single-crystalline LiNbO 3 slabs, which provide strong index guiding in the vertical direction.…”

Section: Photonic Crystal Structuresmentioning

confidence: 99%

High-density integrated optics in ion-sliced lithium niobate thin films

et al. 2010

View full text Add to dashboard Cite

We report on the fabrication of ion-sliced single-crystalline lithium niobate thin films and realization of electro-optically tunable microring resonators and photonic bandgap structures for high-density integrated optics devices. Using a homebuilt high-resolution laser lithography system we structured microring resonators with a free spectral range of > 7 nm, a quality factor of up to 10'000, and a tunability of 1 pm/V at wavelengths around 1.55 m. Moreover, we show that the fabricated microrings can be detached from the original substrate and transferred onto any host substrate. This opens new possibilities for building hybrid integrated optics devices based on lithium niobate microrings and laterally or vertically coupled waveguides of different materials. Combining the laser lithography patterning and focused ion beam milling we have also fabricated planar photonic crystals structures. Triangular lattices of holes with a diameter of 240 nm and a separation of 500 nm exhibit a photonic bandgap in the wavelength range from 1390 and 1500 nm with an extinction ratio of up to 15 dB.

show abstract

The impact of finite-depth cylindrical and conical holes in lithium niobate photonic crystals

Cited by 56 publications

References 0 publications

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

Front-surface fabrication of moderate aspect ratio micro-channels in fused silica by single picosecond Gaussian–Bessel laser pulse

Notice of Retraction: A Theoretical Study on Special Ti:LiNbO$_{3}$ Structure of an Array of Strip Waveguides Embedded in a Planar Waveguide

High-density integrated optics in ion-sliced lithium niobate thin films

Contact Info

Product

Resources

About