Equipment

We have a variety of running Ultrafast Spectroscopy measurement setups that are currently being used and are listed below.

Micro Photoluminescence System (μPL)

  • Excitation: Coherent MIRA 750nm-830nm @ 120fs, 400nm (frequency doubled 800nm) @ variable excitation rate (using AOM), 725nm(PicoQuant) @ 100kHz-80MHz
  • Confocal high NA (0.9, air) excitation/collection objective with Olympus IX71 confocal microscope
  • Spectral detection range:
  • Andor DU420 (VIS/IR) and LN cooled CCD spectrometers 400nm – 2μm (Princeton Instruments SP2300 and SP2500)
  • TCSPC electronics with 40ps time resolution
  • Fully compatible with liquid helium/nitrogen temperature measurements in Oxford MicrostatHiRes2
  • MIRA (760nm-830nm at 120fs)
  • µPL Setup Coupled to MIRA
  • Brown&Twiss TCSPC Electronics

Pump/Probe Optical Spectroscopy

  • 1-5kHz repetition rate, 1mJ-100fs pulse, 800nm @ pump: full spectral tunability using light conversion in TOPAS (400nm – 2.5μm) 
    @ probe: white light generation using Ti Saph crystal
  • Picosecond time resolution in reflection and transmission geometry
  • Compatible with LN measurements in Janis VPF cryostat
  • TOPAS

Single particle spectroscopy

  • Single QD characterization (TCSPC electronics-200ps)
  • Sub micron precision motors coupled to IX71 confocal microscope for single NQD positioning
  • Excitation wavelength tunability from 405nm-IR (supercontinuum generation and PicoQuant laser head) with tunable repetition rate (MIRA coupled with AOM to pump SC generation)
  • High efficiency signal collection using oil/water immersion objective – Zeiss Fluar 100x NA=1.3, Olympus UPLSAPO 60XW NA=1.2
  • Hanbury Brown and Twiss geometry combined with spectral detection range 400nm-2μm – LN cooled CCD spectrometers (Princeton Instruments SP2300 and SP2500)
  • Compatible with liquid helium/nitrogen temperature measurements in Oxford MicrostatHiRes2
  • Single DNA/molecule FRET measurement ready (calibrated with ATTO 590 dye – τ=0.15ms)
  • Integrated pulse compression setup after AOM
  • Single NQD at IX71 with Wide Field Illumination
  • Supercontinuum and PQ (405nm)

Single particle spectroscopy

  • Single QD characterization (TCSPC electronics-200ps)
  • Sub micron precision motors coupled to IX71 confocal microscope for single NQD positioning
  • Excitation wavelength tunability from 405nm-IR (supercontinuum generation and PicoQuant laser head) with tunable repetition rate (MIRA coupled with AOM to pump SC generation)
  • High efficiency signal collection using oil/water immersion objective – Zeiss Fluar 100x NA=1.3, Olympus UPLSAPO 60XW NA=1.2
  • Hanbury Brown and Twiss geometry combined with spectral detection range 400nm-2μm – LN cooled CCD spectrometers (Princeton Instruments SP2300 and SP2500)
  • Compatible with liquid helium/nitrogen temperature measurements in Oxford MicrostatHiRes2
  • Single DNA/molecule FRET measurement ready (calibrated with ATTO 590 dye – τ=0.15ms)
  • Integrated pulse compression setup after AOM

Tsunami/SpitFire PRO

  • 80MHz: 750nm-850nm @ 100fs
  • 1-5kHz repetition rate, >1mJ @ 40fs pulse
  • Speectral tunability: VIS/NIR/IR (2x OPAs)