Sham N. Dixit

TL;DR: The complete frequency dependence of the third-harmonic generation in both {ital trans}-polyacetylene and polydiacetylene within the same model without invoking weak Coulomb interactions between electrons or interchain interactions is explained.

TL;DR: A versatile, rapidly convergent, iterative algorithm is presented for the construction of kinoform phase plates for tailoring the far-field intensity distribution of laser beams that contains more than 95% of the incident energy inside a desired region and is relatively insensitive to beam aberrations.

TL;DR: It is shown that the high-energy oscillatory feature in the electroabsorption spectrum originates from the conduction-band threshold, which is separated from the exciton in polydiacetylenes and also plays an important role in other nonlinear optical processes such as third-harmonic generation and two-photon absorption.

TL;DR: An iterative algorithm for constructing fully continuous phase screens for tailoring far-field intensity profiles is presented and is robust, stable, and, if run properly, maintains the continuous nature of the phase throughout the iterative process.

TL;DR: In this paper, the first forty-eight assemblies of the National Ignition Facility (NIF) were completed and the final optics design was described and selected results from first-article commissioning and performance tests are presented.