Coherent and Squeezed Phonons: Control of Lattice Vibrations with Light Pulses

9876862Merlin该项目研究使用超快激光器在THz频率下产生振动状态，其中振幅和波动，即，可以相干地控制离子运动中的噪声。本研究的目标是提供一个完整的表征这种（相干和压缩）状态，阐明在不透明制度的生成机制，并开发一种能力，实现高强度的声子场的晶格控制的目的。后一项任务，侧重于共振激发，涉及晶格非谐效应的基础研究和潜在的应用领域的超快X射线调制和相干退火的杂质。该项目为本科生和研究生提供了获得材料科学和最先进光学技术技能的绝佳机会。%该项目的重点是使用超快激光产生高频振动和控制原子运动。该计划涵盖了基础和应用方面。潜在的应用包括半导体和光电子工业的材料处理以及在广泛领域中用于时域结构研究的X射线超快调制。这项研究为前沿技术领域的本科生和研究生的培训提供了极好的机会。

9876862MerlinThis project investigates the use of ultrafast lasers to generate vibrational states at THz frequencies where both the amplitude and the fluctuations, i.e., noise, in the ion motion can be coherently controlled. The goals of this research are to provide a full characterization of such (coherent and squeezed) states, to elucidate the generation mechanisms in the opaque regime, and to develop a capability for attaining high-intensity phonon fields for lattice-control purposes. This latter task, focusing on resonant excitation, relates to fundamental studies of lattice anharmonic effects and potential applications in the areas of ultrafast X-ray modulation and coherent annealing of impurities. This project offers excellent opportunities for undergraduate and graduate students to acquire skills in materials science and state-of-the-art optical techniques.%%%This project centers on the generation of high-frequency vibrations and control of the atomic motion using ultrafast lasers. The program covers both fundamental and applied aspects. Potential applications include the processing of materials for the semiconductor and optoelectronics industry and ultrafast modulation of X-rays for time-domain structural studies in a wide range of fields. The research offers excellent opportunities for the training of undergraduate and graduate students in a forefront technological field.***