Publications by authors named "Kotaro Imasaka"
Article Synopsis
- * The study showcases the use of gold nano-antennas in a wide-bandgap semiconductor, ZnO, to effectively trigger HHG with lower input intensity and achieve high harmonic orders.
- * Enhanced conversion efficiency due to nano-antennas leads to a significant increase in total yield, and the results may allow for the development of compact EUV sources and improved understanding of material band structures.
Article Synopsis
- The study explores how high harmonics produced in gallium selenide behave under different electric field strengths when exposed to mid-infrared laser pulses, noting that certain polarization properties emerge only at high fields.
- A theoretical model is created to explain this phenomenon, suggesting that the unique shape of energy bands in solids contributes to the generation of odd harmonics with perpendicular polarization.
- The findings are backed by quantum mechanical simulations, which confirm that odd and even harmonics arise from different physical processes, emphasizing the connection between a material's band structure and its harmonic properties.
