B. Koppitz
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View article: <i>In situ</i> SHG microscopy investigation of the domain-wall conductivity-enhancement procedure in lithium niobate
<i>In situ</i> SHG microscopy investigation of the domain-wall conductivity-enhancement procedure in lithium niobate Open
Conductive domain walls (CDWs) in the uniaxial ferroelectric lithium niobate (LiNbO3, LN) have attracted much interest as potential elements in 2D nanoelectronics due to their orders-of-magnitude larger electronic AC and DC conductivities …
View article: Second harmonic generation contrasts of ferroelectric domain structures and composition in lithium niobate–tantalate mixed crystals
Second harmonic generation contrasts of ferroelectric domain structures and composition in lithium niobate–tantalate mixed crystals Open
Lithium niobate–tantalate mixed (LNT) crystals promise improved performance and new applications for optical, piezomechanical, or electrical devices when compared to the end composition compounds lithium niobate and lithium tantalate. The …
View article: Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films
Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films Open
Stress plays a crucial role in thin films and layered systems, and thus significantly influences the material's electrical, mechanical and (nonlinear) optical responses. Despite lithium niobate's wide applicability as a nonlinear optical m…
View article: Impact of ion exchange on vibrational modes in Rb-doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>KTiOP</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>: A Raman spectroscopy study on the interplay between ion exchange and polarization switching
Impact of ion exchange on vibrational modes in Rb-doped : A Raman spectroscopy study on the interplay between ion exchange and polarization switching Open
Recently, ion exchange (IE) has been used to periodically modify the coercive field (Ec) of the crystal prior to periodic poling, to fabricate fine-pitch domain structures in Rb-doped KTiOPO4 (RKTP). Here, we use micro-Raman spectroscopy t…
View article: Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals
Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals Open
Lithium niobate and lithium tantalate are among the most widespread materials for nonlinear, integrated photonics. Mixed crystals with arbitrary Nb–Ta ratios provide an additional degree of freedom to not only tune materials properties, su…
View article: Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K
Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K Open
View article: Comparative study of photo-induced electronic transport along ferroelectric domain walls in lithium niobate single crystals
Comparative study of photo-induced electronic transport along ferroelectric domain walls in lithium niobate single crystals Open
Ferroelectric domain wall conductivity (DWC) is an intriguing and promising functional property that can be elegantly controlled and steered through a variety of external stimuli such as electric and mechanical fields. Optical-field contro…
View article: Towards the reproducible fabrication of conductive ferroelectric domain walls into lithium niobate bulk single crystals
Towards the reproducible fabrication of conductive ferroelectric domain walls into lithium niobate bulk single crystals Open
Ferroelectric domain walls (DWs) are promising structures for assembling future nano-electronic circuit elements on a larger scale, since reporting domain wall currents of up to 1 mA per single DW. One key requirement hereto is their repro…
View article: Ferroelectric Hysteresis Measurement in the Lithium Niobate‐Lithium Tantalate Single‐Crystalline Family: Prospects for Lithium Niobate‐Tantalate
Ferroelectric Hysteresis Measurement in the Lithium Niobate‐Lithium Tantalate Single‐Crystalline Family: Prospects for Lithium Niobate‐Tantalate Open
Poling and structuring of ferroelectric domains form the basis for developing prospective applications using materials from the lithium‐niobate (LN) family. Applications range from second harmonic generation to electro‐optic modulators or …
View article: Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals
Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals Open
Lithium niobate and lithium tantalate are among the most widespread materials for nonlinear, integrated photonics. Mixed crystals with arbitrary Nb-Ta ratios provide a new degree of freedom to tune materials properties, such as the birefri…