S. Benis, Natalia Múnera, E. W. Stryland, D. Hagan
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Transient Nonlinear Phase-Shift in Epsilon-Near-Zero Materials
We present direct measurements of the nonlinearly induced phase-shift and spectral shift via beam-deflection technique and cross-phase modulation measurements. The optical nonlinearities are enhanced due to the highly dispersive nature of epsilon-near-zero materials, which allows obtaining reduced group velocity and enhanced phase velocity.