High intensity laser-matter interactions

本文主要研究利用非线性光学技术改变激光脉冲的特性，进而影响介质的结构。我们将从近红外光谱中的短脉冲开始，并产生彩虹的颜色。我们将及时重叠颜色，以产生比输入更短、更强烈的脉冲。超短脉冲将用于爆炸分子，这样我们就可以确定分子中所有组成原子的位置。我们还将使用非线性光学将波长从近红外推到中红外，其中较低的频率对应于分子的振动次数。中红外辐射可以测量或控制振动。最后，我们将使用短的近红外脉冲在眼睛的晶状体中制造微小的气泡，以确定是否可以通过这种方式制造气泡以增加晶状体的弹性，从而可能为老花眼提供治疗方法。

The proposed research is about using nonlinear optics to change the characteristics of the laser pulse and to affect the structure of media. We will start with short pulses in the near infrared of the spectrum and produce a rainbow of colours. We will overlap the colours in time to make shorter, more intense pulses than the input. The ultrashort pulses will be used to explode molecules so that we can determine the positions of all the constituent atoms in the molecules. We will also use nonlinear optics to push the wavelength from the near infrared out to the mid-infrared, where the lower frequencies correspond to the vibration times of molecules. The mid-infrared radiation can then measure or control the vibration. Finally, we will use the short near infrared pulses to create microscopic bubbles into the crystalline lens of the eye to determine if the bubbles can be made in such a way as to increase the elasticity of the lens and thereby possibly provide a cure for presbyopia.