Conveners
(DAMOPC) M2-8 Scattering & Spectroscopy | Diffusion et spectroscopie (DPAMPC)
- Ali Hatef
We report an improved variational upper bound for the ground state energy of H$^-$ using Hylleraas-like wave functions in the form of a triple basis set having three distinct distance scales. The extended precision DQFUN of Bailey, allowing for 70 decimal digit arithmetic, is implemented to retain sufficient precision. Our result exceeds the previous record [1], indicating that the Hylleraas...
In this work, the Bragg Scattering for metallic nanohybrid made of an ensemble of metallic nanorods doped in a substrate. Such substrate can be any suitable gas, liquid and solid. Moreover, a theory was developed to describe the relation between an external incident laser intensity and Bragg scattered light intensity. When the external laser was applied to the metallic nanohybrids, the photons...
One of the major discoveries resulting from the invention of the laser was the existence of nonlinear optical processes: phenomena only described by nonlinear dependencies of a material’s electric polarization on the electric field of incident light. Two of these processes are second harmonic generation (SHG) and third harmonic generation (THG), which are frequency-doubling and...
Stimulated Raman spectroscopy in the femtosecond (1 fs = 1$\times 10^{-15}$~s) regime provides a versatile route to measuring the dynamics of molecules on the timescale at which they occur. A tunable and broadband probe pulse allows for detecting molecular signatures across a wide range of energies (frequencies). We develop a novel method for generating the probe pulse that results in the...
