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Surface states have a fundamental role in many modem technologies as well as in the field-matter interaction exhibited by material surfaces. Their manipulation can be used to functionalise surfaces into devices, enabling or enhancing specific physical mechanism [1]. Many rising technologies, such as photovoltaic metasurfaces, rely on thin-layer semiconductors [2, 3]. Most semiconductor surfaces exhibit...
Thin-film-based LiNbOs components have been experiencing an increasing success over the past decade due to their potentiality to enhance electro-optical (EO) or nonlinear (NL) effects [1, 2]. Therefore, their production at low cost is becoming a major challenge. In [3, 4], we proposed a precise-dicing-based technique for the low-cost production of confined LiNbO3 waveguides with integrated Spot-Size-Converters,...
Studies of femtosecond laser ablation are motivated both by its applications in micromachining and by the need to understand optical damage by intense femtosecond laser pulses. Virtually all of the prior studies have been conducted for the cases in which the ablating laser pulse strikes the surface of the material at normal angle of incidence (AOI). However, in practice, many if not most optical elements...
Ultrashort pulsed lasers offer a high potential for precise and efficient material processing. Thus, the fundamental understanding of the laser-material interaction aspects is of great importance. The reflectivity and absorption of material experience significant changes during and after being irradiated by an ultrashort laser pulse. These changes influence decisively the laser-material interaction...
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