20 Jun 2012 Transient absorption spectrometer HARPIA is the first of the series of ultrafast spectrometers developed by Light Conversion to be used together with PHAROS/ORPHEUS laser systems. It features market-leading characteristics such as 10-5 resolvable signals, along with other unique properties such as ability to work at high repetition rates up to 1000 kHz. High repetition rate allows measuring transient absorption dynamics while exciting the samples with extremely low pulse energies (thereby avoiding exciton annihilation effects in energy transferring systems, or nonlinear carrier recombination in semiconductor/nanoparticle samples).
A number of probe configurations and detection options are available, starting with a simple and cost-effective pair of photodiodes for single-wavelength detection, and ending with spectrally-resolved broadband detection combined with white-light continuum probing. Similarly, different delay line options can be selected to cover delay windows from 1.7 ns (standard) to 8 ns. HARPIA includes PC with pre-installed National Instruments Labview® – based measurement automation software that provides the fully controllable, customizable and automatic performance of pump-probe measurements. Flexibility of NI Labview allows easy customization of software by the user to tailor it to the needs of specific measurements. Preset or custom delay times, number of averages per transient spectrum and other options are available at a click of the mouse. In addition to experiment automation software, HARPIA includes the data analysis package for inspecting the acquired data and performing global and target analysis, probe dispersion compensation, exponential fitting etc. The software package features an intuitive and user-friendly interface; it is delivered with data analysis tutorial that offers seamless transition from the raw data to publication-quality graphs and model-based parameter estimation. All the software runs under MS Windows and is easy to use. Even a novice will become an analysis expert in a matter of days!
Features: - Compatible with laser systems running at 0.01-200 kHz (Spectra acquired at rates 1-1000 Hz)
- When backed-up by Pharos/ Carbide laser system, capable of measuring pump probe signals at extremely low pump pulse energies (<1 nJ)
- In combination with Pharos/ Orpheus laser system, easily resolves kinetic traces with maximum amplitude of 0.0001 OD
- Probe spectral range: 480-1100 nm
- Temporal resolution – 1.4 times laser pulse duration
- Includes a spectrograph with user-changeable gratings for different spectral ranges and spectral resolutions. Standard spectral range – 480-1100 nm, spectral resolution <1.5 nm. Multichannel detector is sensitive in the range 200-1100 nm and capable of measuring up to 2000 spectra per second
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