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Research
Interests |
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Research
Programs |
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Research
Facilities |
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Research
Techniques
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Research
Interests |
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General Research Interests:
- photophysics of polymers
- energy transport in macromolecules
- electron transfer in multichromophoric
systems
- ultrafast dynamics in condensed
phases
- pulsed laser polymerization
kinetics
- high pressure photochemistry/photophysics
- time-resolved anisotropy
measurements
- two photon and confocal
fluorescence microscopy
- ultrafast laser spectroscopy
Specific Research Interests:
- electron transfer kinetics
in rigidly-linked supramolecules
- porphyrin-based photosensitisers
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Research
Programs |
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See each of our group members'
homepages for some specific research programs in progress.
In general, our research programs
are based around the following equipment: |
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Research
Facilities |
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Laser Systems:
- Femtosecond titanium:sapphire oscillator
system:
- Coherent Mira 900 femtosecond titanium:sapphire pumped
by an 18W Verdi DPSS laser
- Cavity dumped with a PulseSwitch
- APE synchronously pumped optical parametric oscillator
(OPO), intracavity doubled
- Home-built pulse picker based on a TeO2
Bragg cell and CAMAC driver
- Frequency doubler and tripler systems
- Femtosecond amplified titanium:sapphire system:
- Coherent MiraSeed
- Coherent RegA 9050 high repetition rate amplifier and
a pair of OPA9450 optical parametric amplifiers
- Picosecond dye laser system:
- SpectraPhysics 2030 mode-locked Ar+ laser
- TimeBandwidth Cheetah X SESAM picosecond mode-locked DPSS
laser
- Cavity dumped 3500 dye laser
- Cavity dumped 375 dye laser
- Nanosecond Nd:YAG/OPO systems:
- Continuum NY-61 Q-switched Nd:YAG laser
- Casix nanosecond optical parametric oscillator (OPO)
- QuantaRay DCR-11 Q-switched Nd:YAG laser
Detection Systems:
- Princeton Instruments (Roper) nanosecond ICCD camera/ARC
spectrometer
- Time-correlated single photon counting apparatus (Tennelec,
Ortec, Edinburgh Instruments, Becker & Hickl SPM-830)
- Applied Photophysics 410 arc lamp pulser unit
- Microwave conductivity detection apparatus
- Edinburgh Instruments Ge infrared detector
Fluorescence microscopy systems:
- Nanonics scanning near field optical micrscope
- Olympus FV300 scanning confocal system on IX71 frame
- this system can use the following ultrafast laser alternatives
as its light source
- the 76 MHz output of the Ti:sapp or the OPO
- the pulse picked output (15 MHz-single shot) of
either the Ti:sapp or the OPO
- the 250 kHz output of the RegA or OPA
- the cavity dumped output of the picosecond dye laser.
- associated with this system is a La Vision PicoStar
HR intensified CCD camera for time resolved fluorescence imaging
by either time gating or frequency modulation using the high
repetition rate laser pulses
- time resolved fluorescence measurements can also be
recorded using time-correlated single photon counting methods
- for time-resolved fluorescence decay measurements
and imaging we use the following:
- Edinburgh Instruments TCC900 TCSPC card
- Becker & Hickl SPC830 photon counting card.
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Olympus FV500 scanning confocal system on IX71 frame
- this system now also includes a Jobin Yvon 550 spectrometer
and N2 cooled CCD array
for spectral characterisation of confocal emission
- it also incorporates an ALV correlator for single moelcule
and fluorescence correlation spectroscopy (FCS) measurements
using a pair of single photon avalanche photodiodes
- Olympus BH-2 fluorescence microscope
- LaVision picosecond ICCD camera system
Spectrometers:
Cary Bio50 UV-VIS spectrometer
Cary Varian Eclipse Fluorescence Spectrometer
Hitachi 4010 spectrofluorimeter
Cryostats:
Miscellaneous:
For a brief tour of the labs click this link (Quicktime 4 or
higher required):
Tour 1
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Research
Techniques |
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- Time-correlated single photon counting (TCSPC)
- Transmission pump-probe methods
- Time-resolved evanescent wave-induced fluorescence spectroscopy
(TREWIFS)
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- Fluorescence upconversion
- Laser flash photolysis
- Time-resolved anisotropy measurements
- Ground-state recovery pump-probe measurements
- Fluorescence microscopy
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- fluorescence lifetime imaging
- two photon fluorescence microscopy
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