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Search Publications by: Jared Wahlstrand (Fed)

Displaying 26 - 33 of 33

Bound electron nonlinearity beyond the ionization threshold

May 2, 2018

Author(s)

Jared K. Wahlstrand, Sina Zahedpour, Anand Bahl, Miroslav Kolesik, H M. Milchberg

Although high field laser-induced ionization is a fundamental process at the root of many applications, there have been no absolute measurements of its transient rate. Such information is crucial, for example, for understanding the propagation of high

Contactless mobility measurements using two-photon excitation and a terahertz probe

March 6, 2018

Author(s)

Jared K. Wahlstrand, Edwin J. Heilweil

Time-dependent THz spectroscopy is widely used for measuring mobility in novel electronic materials, in which the mobility is often adversely affected by defects and unintentional dopants [1]. One of its great advantages over other techniques is that it

Nonlinear optical polarization response and plasma generation in noble gases: Comparison of MESA models to experiments

October 30, 2017

Author(s)

Jared K. Wahlstrand, Anand Bahl, Sina Zahedpour, H M. Milchberg, Miroslav Kolesik

The nonlinear polarization response and plasma generation in noble gases produced by high- intensity optical pulses, modeled by the metastable electronic state approach, are verified against three-dimensional, space-and-time resolved measurements with

Bound Electron Nonlinearity Beyond the Ionization Threshold

September 18, 2017

Author(s)

Jared K. Wahlstrand, Sina Zahedpour, H M. Milchberg

Using supercontinuum spectral interferometry, we measure the ionization induced optical phase shift in three noble gases and nitrogen and oxygen. Results largely support the standard model of filamentation.