Nanophotonics Capabilities

Ultrafast Transient-Absorption Spectroscopy

• 230- to 2700-nm laser excitation
• 300- to 1550-nm probe wavelength range
• Delay times <100 fs-0.1 ms
• Pump1-pump2-probe capabilities

Time-Resolved Emission Spectroscopy and Microscopy

• Visible time-correlated single-photon counting
• 30-ps temporal resolution
• Two laser sources:
• Supercontinuum ultrafast laser source for tunable excitation
• Ti:Sapphire oscillator with 15-fs laser pulses centered at 800 nm
• Microscopy with diffraction limited spatial resolution
• Near-infrared time-correlated single-photon counting
• 300-ps temporal resolution
• 405- and 705-nm excitation
• 800- to 1650-nm detection
• Hamamatsu streak camera equipped with two photocathodes for broad spectral sensitivity covering 300-950 nm
• Temporal resolution down to 3 ps; 110-ps to 50-ns time window
• Transient spectra with up to a 400-nm-wide window
• Various visible and near-infrared array detectors and mid-infrared fluorescence
• Horiba Jobin-Yvon Nanolog Spectrofluorimeter for time-correlated single-photon counting
• 300- to 1000-nm detection
• Time-resolved fluorescence
• ~200-ps to 100-ms time window
• 488-, 560-, 625-nm excitation
• Time-resolved phosphorescence
• ~100-ms to 10-s time window
• 370-, 460-, 560-nm excitation

Sample-Handling Capabilities for Transient Absorption and Emission Spectroscopy

• Solution and thin-film sample handling with flow and raster scanning
• Temperature control from 2.6 to 800 K
• Sample pressurization via diamond anvil cells
• Oxygen-free and/or vacuum environments

Confocal Raman Microscopy

• 325-, 442-, 514-, 633-, 785-nm laser excitation
• Macro and micro sampling capability
• Fully automated Raman area mapping:  <1-micron XY resolution
• Fully integrated temperature controlled stage: 77-875 K

Near-Field Scanning Optical Microscopy

• Dual scan heads
• Single micropositioning head
• Multiple configurations
• Collection mode
• Excitation mode
• Confocal mode
• Operates in transmission or reflection
• 400- to 900-nm laser excitation

Nanophotonics Nanoparticle Synthesis Laboratory

• Controlled synthesis of highly monodisperse colloidal nanoparticles
• Symmetric and asymmetric assembly of nanoparticles with multiple functionalities
• Engineering of surface chemistries of nanoparticles

Visible and Near-Infrared Microscopy

• Visible
• Transmission and reflection illumination
• Bright field and dark field microscopy and spectroscopy
• 400- to 900-nm illumination and detection
• TE-cooled CCD two-dimensional array detector
• Hyperspectral imaging with an electronically tunable optical filter
• Near-infrared
• Transmission illumination
• Bright field microscopy and spectroscopy
• 800- to 1600-nm illumination and detection
• Two-dimensional LN2-cooled InGaAs array detector

Varian Cary-50 UV/VIS Spectrophotometer

• 190- to 1100-nm scan range
• Variable-temperature cell holder
• Thi- film holder

Thermo-Nicolet Fourier-Transform Spectrometer

• Near-infrared from 800 to 2300 nm
• Mid-infrared from 2 to 20 mm

Horiba Jobin-Yvon Nanolog Spectrofluorimeter

• 240- to 1800-nm excitation
• Single-channel detection
• 300- to 1000-nm PMT detector
• 800- to 3000-nm PbS detector
• Two-dimensional emission spectroscopy (steady-state)
• 300- to 1000-nm LN2-cooled CCD array detector
• 800- to 1550-nm LN2-cooled InGaAs array detector
• 240- to 1800-nm excitation
• Integrating sphere for quantum yield measurements and for films
• 400- to 800-nm excitation
• 300- to 1000-nm detection

Size-Selected Clusters and Cluster-Based Nanomaterials

• Atomic precision synthesis in molecular beams and deposition of size- and composition selected sub-nanometer metal clusters (mass range 2000 amu)
• Tests of model catalysts under realistic reaction conditions of pressure and temperature (up to ~1.5 atm, ~400°C)

Note: Not all combinations of techniques are possible. Please contact a Nanophotonics Group staff member with any questions.