Research interests

Instruments

Funding

Collaborations

Also referred to as Femtosecond Fluorescence Upconversion, FOG is used to study fluorescence dynamics in 100s of femtoseconds to 100s of picosecond. It involves spatial and temporal overlap of the fluorescence from a sample with a gate pulse from the fundamental output of a titanium sapphire laser. Our system consists of a Tsunami Ti:sapphire laser, pumped by Spectra Physics Millennia. The FOG spectrometer is from CDP Corporation.	Our laboratory is now equipped with a state of the art transient absorption setup, which uses a Coherent Libra one box amplifier with 4 W output at 800 nm. A part of this output is used to pump a Light Conversion TOPAS Optical parametric amplifier, which provides us with extremely wide range of tunability for the pump pulse. In the transient absorption setup from CDP Corporation, the broadband probe pulse is generated by focusing a small amount of the Libra output o	Our reliable workhorse since 2003, this Time Correlated SIngle Photon Counting (TCSPC) spectrometer from erstwhile IBH Corporation (presently Jobin Yvon Horiba) is used to record fluorescence decays in 100s of picosecond to 100s of nanosecond time regime. We also have a second instrument which uses nanoLED light sources from JY Horiba, a Hamamatsu MCP - PMT detector and Picoquant Picoharp electronics.
JASCO V530 absorption spectrophotometer and Cary Eclipse fluorimeter are our used routinely to provide steady state spectra.