Two-Photon Cooperative Cascade Superfluorescence (Physics)
{'Code': '03010100', 'Directorate': {'Abbreviation': 'MPS', 'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'Abbreviation': 'PHY', 'LongName': 'Division Of Physics'}}
{'SignBlockName': 'Arthur Komar', 'PO_EMAI': None, 'PO_PHON': None}
It is planned to perform a comprehensive and systematic                    investigations of cooperative cascade superfluorescence in 3-                   level atomic systems.  A synchronously pumped picosecond dye                    laser working at twice the wave length of the 6S-6D transition in               Cs vapor will coherently excite a 6S-6D superposition state                     which will coherently radiate to the ground state.  A resonant                  optical pumping scheme will allow the polarized two-photon                      picosecond excitation to invert a small velocity subgroup,                      lengthening the effective inhomogeneous linewidth to the                        fluorescence lifetime, so that when superradiance occurs it is                  delayed from the excitation pulse by a detectable amount.  The                  relative intensities and positions of superradiant burst will be                studied as a function of excitation pulse intensity, light                      traversal time, delay time, and absorption.
{'FirstName': 'Sven', 'LastName': 'Hartmann', 'PI_MID_INIT': 'R', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Sven R Hartmann', 'EmailAddress': 'shr@cuphy3.phys.columbia.edu', 'NSF_ID': '000158340', 'StartDate': '05/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Columbia University', 'CityName': 'NEW YORK', 'ZipCode': '100277922', 'PhoneNumber': '2128546851', 'StreetAddress': '615 W 131ST ST', 'StreetAddress2': 'MC 8741', 'CountryName': 'United States', 'StateName': 'New York', 'StateCode': 'NY', 'CONGRESSDISTRICT': '13', 'CONGRESS_DISTRICT_ORG': 'NY13', 'ORG_UEI_NUM': 'F4N1QNPB95M4', 'ORG_LGL_BUS_NAME': 'THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK', 'ORG_PRNT_UEI_NUM': None}
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