2026-09-20T12:43:08Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/16717 2023-07-10 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Eden, James G. Eden, James G. Swenson, Gary R. Carney, Paul S. McCall, Benjamin J. Spinka, Thomas M. 2010-08-20T17:55:47Z 2010-08-20T17:55:47Z 2010-08-20T17:55:47Z 2010-08 Nonlinear optical processes, with a particular emphasis on parametric four-wave mixing (PFWM), are studied in rubidium vapor. A theoretical framework is introduced that enables accurate calculations of nonlinear light-matter interactions, and calculations of these interactions using this framework are performed for a broad range of excitation conditions. In particular, the effects of femtosecond pulse parameters such as pulse duration, pulse energy, center wavelength, and chirp are investigated. Simulation results provide insight into the light-matter interactions in rubidium vapor for these conditions. The effects of pump pulse parameters on the production and evolution of atomic wavepackets in the nonlinear medium are investigated. A number of femtosecond-scale phenomena that were elusive or previously unknown are observed, including the observation of quantum beating at pump-probe time delays exceeding 500 ps, quantum beating on the 7s1/2 - 5d3/2 energy defect at 611 cm-1, and the effects of pump pulse chirp on the amplitude and temporal dynamics of quantum beating. Toward the goal of using the nonlinear optical process of PFWM to interrogate the nearest neighbor distribution (NND), a new analytical derivation for the NND in the non-interacting particle approximation is presented, along with the results of molecular dynamics simulations of the NND in rubidium vapor for realistic pair interaction potentials. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-07-07T17:41:24Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Spinka_Thomas.zip: 3707731 bytes, checksum: f8fb1c3863545850ca883c15cdb350cc (MD5) Spinka_Thomas.pdf: 3993240 bytes, checksum: 90e3b29f9b4c7dd7f94c4d3dc5684faf (MD5) Made available in DSpace on 2010-08-20T17:55:47Z (GMT). No. of bitstreams: 3 Spinka_Thomas.zip: 3707731 bytes, checksum: f8fb1c3863545850ca883c15cdb350cc (MD5) Spinka_Thomas.pdf: 3993240 bytes, checksum: 90e3b29f9b4c7dd7f94c4d3dc5684faf (MD5) license.txt: 4061 bytes, checksum: 3dbc2c1d1b1c02af9dd59161dff5bec8 (MD5) http://hdl.handle.net/2142/16717 en Copyright 2010 Thomas M. Spinka Parametric Four Wave Mixing Nearest Neighbor Distribution Light-Matter Interactions Nonlinear Optics Rubidium Density Matrix Molecular Dynamics Nonlinear optical processes and the nearest neighbor distribution in rubidium vapor Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Electr & Computer Eng-UIUC 10KS1200PHD