Nanoscale backswitched domain patterning in lithium niobate

Abstract

We demonstrate a promising method of nanoscale domain engineering, which allows us to fabricate regular nanoscale domain patterns consisting of strictly oriented arrays of nanodomains (diameter down to 30 nm and density up to 100 μm−2) in lithium niobate. We produce submicron domain patterns through multiplication of the domain spatial frequency as compared with the electrode one. The fabrication techniques are based on controlled backswitched poling.

Single WDM channel efficient wavelength shifting and/or amplification using counterpropagating optical parametric amplifiers

“…Both narrow signal amplification and wavelength shifting bandwidths and large pump wavelength acceptance make the COPA appealing for all-optical amplifying and/or spectrally shifting a single WDM channel. Whereas peak powers of the order of 10W are required for demonstration of these effects in with the present-technology SPE:LiNbO 3 waveguides, sub-watt excitation can be expected for first-order QPM when the domain backswitch technique [19] or the overpoling technique [20] are used. because of the multivalued response of the COPA.…”

Study on dielectric and piezoelectric properties of 0.7 Pb(Mg1/3Nb2/3)O3-0.3 PbTiO3 single crystal with nano-patterned composite electrode

“…The backswitching poling process has been considered as an effective method to enhance generation of nano-domain structures which includes several distinguishable stages of domain evolution. 23,24 During the backswitching poling, the process starts with the formation of new domains at the surface along the nano-electrode edges due to the field singularities caused by the fringe effect. In other words, the nanograting composite electrode on the surface of PMN-PT can provide periodic nucleation sites.…”

Ferroelectric nanodomain engineering at the −Z face of lithium niobate single crystals

“…Electric-field poling techniques have been extensively investigated for the ferroelectric domain inversion production [3]. Using this technique Shur et al [4] investigated the formation of selforganized nanodomain patterns during the spontaneous backswitching in LN crystals. The nanodomain structures have been observed in uniaxial ferroelectric LN crystals during the spontaneous backswitching after the fast removing of the switching field.…”