J T Fourkas

We demonstrate a scheme for taking single-shot pump-probe data with femtosecond time resolution. Data recorded from a 100-microm-thick dye solution show that pulse-length-limited resolution can be achieved readily with 70-fs...

We show that extra resonances, such as those caused in frequency-domain nonlinear wave mixing by pure dephasing or laser fluctuations, can also be induced by operation in the time domain....

Picosecond four-wave mixing experiments have been used to study collisions in a Na-seeded, premixed, methane-air flame. Population gratings are used to measure Na excited-state quenching collision rates, while polarization gratings...

We describe a laser-scanning two-photon fluorescence microscope that is capable of observing single molecules with excellent temporal resolution and three-dimensional spatial resolution. To demonstrate the capabilities of the instrument we...

A technique is proposed for determination of the three-dimensional orientation of the transition dipoles of single molecules by use of polarization-sensitive detection of fluorescence through a high-N.A. objective. Molecular orientation...

Using a broadband femtosecond laser and a simple optical setup, we demonstrate narrow-bandwidth-tunable excitation of vibrational modes in CCl4 and CHBr3 liquids. The resolution obtained is 80 times higher than...

A connection between measurable equilibrium thermodynamic quantities and a nonequilibrium property of supercooled polymeric liquids, namely, the fragility index, is proposed within the framework of a synthesis of generalized configurational...