230 citations · 620 across the 12 of their papers we have counts for
11 papers
Two-beam coupling by a hot electron nonlinearity
J. Paul, M. Miscuglio, Y. Gui +2
Transparent conductive oxides such as indium tin oxide (ITO) bear the potential to deliver efficient all-optical functionality due to their record-breaking optical nonlinearity at…
Bound electron nonlinearity beyond the ionization threshold
J. K. Wahlstrand, S. Zahedpour, A. Bahl +2
Although high field laser-induced ionization is a fundamental process underlying many applications, there have been no absolute measurements of the nonlinear polarizability of atom…
Two-photon vibrational excitation of air by long-wave infrared laser pulses
J. P. Palastro, J. Penano, L. A. Johnson +3
Ultrashort long-wave infrared (LWIR) laser pulses can resonantly excite vibrations in N2 and O2 through a two-photon transition. The absorptive, vibrational component of the ultraf…
Spatio-temporal optical vortices
N. Jhajj, I. Larkin, E. W. Rosenthal +3
We present the first experimental evidence, supported by theory and simulation, of spatiotemporal optical vortices (STOVs). Quantized STOVs are a fundamental element of the nonline…
Measurement of the nonlinear refractive index of air constituents at mid-infrared wavelengths
S. Zahedpour, J. K. Wahlstrand, H. M. Milchberg
We measure the nonlinear refractive index coefficients in N, O and Ar from visible through mid-infrared wavelengths (λ= 0.4 - 2.4 μm). The wavelengths investigated correspo…
Optical beam dynamics in a gas repetitively heated by femtosecond filaments
N. Jhajj, Y. -H. Cheng, J. K. Wahlstrand +1
We investigate beam pointing dynamics in filamentation in gases driven by high repetition rate femtosecond laser pulses. Upon suddenly exposing a gas to a kilohertz train of filame…