Laser-Based Molecular Spectroscopy

Femtosecond and Nanosecond Transient Absorption Spectroscopy
In its laser-based molecular spectroscopy suite, the Department has a state of the art femtosecond transient absorption spectroscopy (TAS) system composed of a Coherent Astrella one-box Ti:sapphire femtosecond amplifier system, two Coherent OPerA Solo tunable optical parametric oscillator (OPO) lasers, and Ultrafast Systems HELIOS IR and HELIOS FIRE TAS.  The Department also has an Edinburgh Instruments nanosecond transient absorption spectrometer pumped by a Continuum ND:YAG laser.  Together, these instruments allow for characterization of excited states of newly-developed materials and the temporal tracking of events over a wide range of time domains (fs to s) and over a wide range of the electromagnetic spectrum (300 nm – 16000 nm).

 

 

Raman Spectroscopy
In its laser-based molecular spectroscopy suite, the Department has a high resolution Horiba LabRAM HR Evolution confocal Raman spectrometer complete with 600, 1800, and 2400 grooves per mm gratings, CCD camera detection, and the ability to acquire vibrational spectra down to 5 wavenumbers with less than 0.1 wavenumber resolution using 532, 633, or 785 nm laser lines.

 

Single Molecule Spectroscopy
In its laser-based molecular spectroscopy suite, the Department has the capability to study single molecule, single biomolecule, and single nanoparticle fluorescence using Nikon inverted microscope swith high NA (1.4) objectives and iCCD cameras. 

 

Near-Infrared Fluorescence Spectroscopy
In its laser-based molecular spectroscopy suite, the Department has a high resolution QuantaMaster 8075 near-infrared fluorescence spectrometer with Xe lamp and diode laser excitation and detection out to 3000 nm.  This instrument allows for the characterization of emission from newly-developed near-infrared and infrared emitting molecular systems.