Ultrafast 2D IR Pulse Shaping Spectrometer for Tracking, Diagnosing and Impeding Dielectric Breakdown in Polymers.
Abstract
We propose to buy equipment to assembly a state-of-the-art high power and high repetition rate ultrafast 2D IR pulse shaping spectrometer to augment and greatly extend our capabilities for the study of thin polymer films in the investigation of dielectric breakdown. This proposal provides equipment for the recently awarded (Award No.: N00014-17-1-2656) ONR MURI ONR MURI???Tracking, Diagnosing and Impeding Dielectric Breakdown in Polymers,??? (Professor Rampi Ramprasad, U. Conn., PI, Director). The advanced 2D IR pulse shaping spectrometer will give us fundamentally new capabilities and greatly expand experiments on thin polymer films, which we have recently studied with 2D IR spectroscopy for the first time. The new system will reducethe 2 to 3 days it currently takes to produce a high quality data set on a thin polymer film to hours, and it will be possible to study highly scattering polymer films. Such experiments are not possible with the current equipment. The instrument can be roughly broken down into three sections, laserequipment, a high power infrared optical parametric amplifier (OPA), and an acousto-optic pulse shaper. The laser equipment and OPA will provide high repetition high power IR pulses to the pulse shaper, which is the heart of the system. Using pulse shaping to perform 2D IR measurements of the dynamics in thin polymer films will make 2D IR more akin to 2D NMR than our current 2DIR methodology by enabling the control of the phase and timing of pulses electronically. Currently, pulse timing is set using mechanical delay lines, and it is not possible to set the relative phases of the pulses in the 2D IR pulse sequence. The new instrument will provide the resources to greatly increase our understanding of the dynamics of polymer films and how they are affected by theapplication of strong electric field as they progress toward dielectric breakdown.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 27, 2018
- Source ID
- N000141812700
Entities
People
- Michael D. Fayer
Organizations
- Office of Naval Research
- Stanford University
- United States Navy