TY - JOUR
KW - capillary
KW - ionization
KW - plasma
AU - Xiaohui Gao
AU - Gauri Patwardhan
AU - Bonggu Shim
AU - Tenio Popmintchev
AU - Henry Kapteyn
AU - Margaret Murnane
AU - Alexander Gaeta
AB - We demonstrate numerically and experimentally that intense pulses propagating in gas-filled capillaries can undergo localization in space and time due to strong plasma defocusing. This phenomenon can occur below or above the self-focusing threshold ?cr as a result of ionization-induced refraction that excites higher-order modes. The constructive interference of higher-order modes leads to spatiotemporal localization and resurgence of the intensity. Simulations show that this confinement is more prominent at shorter wavelength pulses and for smaller capillary diameters. Experiments with ultraviolet pulses show evidence that this ionization-induced refocusing appears below ?cr and thus represents a mechanism for spatiotemporal confinement without self-focusing.
BT - Optics Letters
DA - 2018-06
DO - 10.1364/OL.43.003112
N2 - We demonstrate numerically and experimentally that intense pulses propagating in gas-filled capillaries can undergo localization in space and time due to strong plasma defocusing. This phenomenon can occur below or above the self-focusing threshold ?cr as a result of ionization-induced refraction that excites higher-order modes. The constructive interference of higher-order modes leads to spatiotemporal localization and resurgence of the intensity. Simulations show that this confinement is more prominent at shorter wavelength pulses and for smaller capillary diameters. Experiments with ultraviolet pulses show evidence that this ionization-induced refocusing appears below ?cr and thus represents a mechanism for spatiotemporal confinement without self-focusing.
PY - 2018
T2 - Optics Letters
TI - Ionization-assisted spatiotemporal localization in gas-filled capillaries
UR - https://www.osapublishing.org/ol/fulltext.cfm?uri=ol-43-13-3112\&id=392792
VL - 43
SN - 0146-9592
ER -