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Time-resolved spectroscopic imaging

The Far Side

Thanks to recent funding from CFI, we have added variable-temperature, time-resolved spectroscopic imaging capabilities to our infrastructure. The principal components of this facility are the following.

• A pulse-tube cooler system confocal microscope, designed for low-vibration, cryogen-free temperature control of the sample between 4.2 K and room temperature, a low-temperature compatible objective lens, XYZ coarse positioning stages, and a low-temperature-compatible XY scanner. Its built-in anti-vibration system enables high-resolution confocal imaging. (attoCube attoCFM-DRY);
• an amplified ultrafast laser system with variable repetition rate between 1 and 600 kHz (Light Conversion Pharos-10W);
• two non-collinear optical parametric amplifiers producing <40-fs tuneable output in the visible spectral region, optimized for operation at a 600-kHz repetition rate (Orpheus-N-2H and Orpheus-N-3H);
• spectrometer containing an intensified CCD (ICCD, LaVision PicoStar HR) for wide-field time-resolved photoluminescence spectroscopy. This detector is also implemented in an ultrafast Kerr-gate photoluminescence imaging apparatus when sub-picosecond time resolution is necessary.