Comprehensive Spectroscopy System HARPIA


  • Transient absorption and reflection in bulk and microscopy
  • Multi-pulse transient absorption and reflection
  • Femtosecond fluorescence upconversion
  • Femtosecond stimulated Raman scattering (FSRS)
  • Picosecond-to-microsecond fluorescence TCSPC
  • Intensity-dependent transient absorption and reflection
  • Flash photolysis
  • Z-scan



  • Transient absorption and reflection in bulk and microscopy
  • Multi-pulse transient absorption and reflection
  • Femtosecond fluorescence upconversion
  • Femtosecond stimulated Raman scattering (FSRS)
  • Picosecond-to-microsecond fluorescence TCSPC
  • Intensity-dependent transient absorption and reflection
  • Flash photolysis
  • Z-scan

The HARPIA comprehensive spectroscopy system performs a variety of sophisticated time-resolved spectroscopic measurements in a compact footprint. It offers an intuitive user experience and easy day-to-day maintenance meeting the needs of today’s scientific applications. Extension modules and customization options tailor the HARPIA system to specific measurement needs.

The system is built around the HARPIA-TA transient absorption spectrometer and can be expanded using time-correlated single-photon counting and fluorescence upconversion (HARPIA-TF), third beam delivery (HARPIA-TB), and microscopy (HARPIA-MM) modules. HARPIA is designed for easy switching between measurement modes and comes with dedicated data acquisition and analysis software. Each module is contained in a monolithic aluminum body ensuring excellent optical stability and minimal optical path lengths.

For a single-supplier solution, the HARPIA spectroscopy system is combined with a PHAROS or a CARBIDE laser together with ORPHEUS series OPAs. HARPIA also supports Ti:sapphire lasers with TOPAS series OPAs.

Measurement range 350 – 1100 nm 460 – 1100 nm 460 – 1600 nm 350 – 1600 nm 2000 – 13000 nm
Excitation range 200 – 1100 nm
Delay range (resolution) 8 ns (8.3 fs) 4 ns (4.2 fs)
Temporal resolution ≤ laser pulse duration or better
Laser repetition rate 1) 1 – 200 kHz
Maximum data acquisition rate 4000 spectra/s
  1. Higher repetition rates available; contact for details.
Extension Flash Photolysis
Measurement range 450 – 2400 nm
Delay range up to 8 ms
Delay resolution 100 ps
Temporal resolution 2 ns
Extension Module HARPIA-TF
Mode Kerr gate Fluorescence upconversion TCSPC
Spectral range 250 – 1000 nm 330 – 1600 nm 320 – 820 nm 1)
Temporal resolution 400 – 500 fs ≤ laser pulse duration or better < 180 ps 2)
Max measurement range 8 ns ∞ 3)
Delay resolution 8.3 fs
Gate beam requirements 15 – 25 μJ n/a
Compatible with TCSPC Kerr gate or fluorescence upconversion
  1. Spectral range is extendable to NIR; contact for details.
  2. High-speed detector available (< 50 ps); contact for details.
  3. Maximum measurement range depends on the phosphorescence signal.
Extension Module HARPIA-TB
Delay range (resolution) 4 ns (4.2 fs)
Spatial resolution 1) monochromatic polychromatic
< 2 µm < 10 µm
Full spectral range 460 – 1100 nm
Temporal resolution 500 fs
Maximum working distance 2) 13 mm
Sample motion range 13 × 13 × 13 mm
  1. White light generation has axial color at focus and wavelength-dependent mode size and NA. Focused white light will exhibit focus shift and spot size variation depending on the chosen spectral range. Polychromatic spot size is given at full spectral range, monochromatic is at 500 nm with a 10 nm bandwidth.
  2. Depends on the objective used.
Model Physical dimensions (L × W × H) 1)
HARPIA-TA 730 × 420 × 160 mm
Sample chamber area (L × W) 2)
205 × 215 mm
HARPIA-TF 571 × 275 × 183 mm
HARPIA-TB 670 × 252 × 183 mm
  1. Without external spectrograph.
  2. External sample placement option is available.

The HARPIA-TA ultrafast transient absorption spectrometer features market-leading characteristics such as 0.05 mOD (10⁻⁴ ΔT/T) sensitivity and the ability to work at high repetition rates up to 1 MHz, when used with a PHAROS or CARBIDE laser and an ORPHEUS series OPA. A high repetition rate allows measuring transient absorption dynamics with excitation pulse energies down to several nanojoules.

The HARPIA-TF is a time-resolved fluorescence measurement module that combines fluorescence upconversion and TCSPC techniques. In fluorescence upconversion, the signal from the sample is mixed in a nonlinear crystal with a gating femtosecond pulse to achieve high temporal resolution, which is limited by the duration of the gate and pump pulses.

The HARPIA-TB is a third beam delivery module for the HARPIA-TA unit that adds an additional dimension to time-resolved absorption measurements. It allows multi-pulse time-resolved spectroscopic techniques, in which the ongoing pump-probe photodynamics are perturbed by a delayed third pulse. In conjunction with a narrow-bandwidth picosecond pulse source, HARPIA-TB can be used to perform femtosecond stimulated Raman scattering (FSRS) measurements.

HARPIA-MM is a microscopy module add-on to the HARPIA-TA spectrometer, which enables spatially-resolved pump-probe measurements with a spatial resolution down to 2 μm. The sample can be positioned and scanned in a 13 mm range along XYZ axes using a motorized stage. Microscopic transient transmission and reflection signals can be measured using a broadband or a monochromatic probe.

A single software solution for all measurement modes, featuring:

  • User-friendly interface
  • Measurement presets
  • Measurement noise suppression
  • Diagnostics and data export
  • Continuous support and updates
  • API for remote experiment control using third-party software (LabVIEW, Python, MATLAB)

An ultrafast spectroscopy data analysis software, featuring:

  • Advanced data wrangling: slicing, merging, cropping, smoothing, fitting, etc.
  • Advanced global and target analysis
  • Probe spectral chirp correction, calibration and deconvolution
  • Support for 3D data sets (2D electronic spectroscopy, fluorescence lifetime imaging)
  • Publication-ready figure preparation and data export

Atomic structure of a seed-sized gold nanoprism

Y. Song, Y. Li, M. Zhou, H. Li, T. Xu, C. Zhou, F. Ke, D. Huo, Y. Wan, J. Jie et al., Nature Communications 1 (13) (2022).

Charge Photogeneration and Recombination in Fluorine-Substituted Polymer Solar Cells

R. Hu, Y. Liu, J. Peng, J. Jiang, M. Qing, X. He, M. Huo, and W. Zhang, Frontiers in Chemistry 10 (2022).

Dopamine Photochemical Behaviour under UV Irradiation

A. Falamaş, A. Petran, A. Hada, and A. Bende, International Journal of Molecular Sciences 10 (23), 5483 (2022).

Electron–Hole Binding Governs Carrier Transport in Halide Perovskite Nanocrystal Thin Films

M. F. Lichtenegger, J. Drewniok, A. Bornschlegl, C. Lampe, A. Singldinger, N. A. Henke, and A. S. Urban, ACS Nano (2022).

Evidence and Governing Factors of the Radical-Ion Photoredox Catalysis

D. Y. Jeong, D. S. Lee, H. L. Lee, S. Nah, J. Y. Lee, E. J. Cho, and Y. You, ACS Catalysis, 6047-6059 (2022).

Exciton-Like and Mid-Gap Absorption Dynamics of PtS in Resonant and Transparent Regions

J. Huang, N. Dong, N. McEvoy, L. Wang, H. Wang, and J. Wang, Laser &amp$\mathsemicolon$ Photonics Reviews, 2100654 (2022).

Highly Efficient Quasi-2D Green Perovskite Light-Emitting Diodes with Bifunctional Amino Acid

C. Liu, Y. Liu, S. Wang, J. Liang, C. Wang, F. Yao, W. Ke, Q. Lin, T. Wang, C. Tao et al., Advanced Optical Materials, 2200276 (2022).

Insight into perovskite light-emitting diodes based on PVP buffer layer

N. Jiang, Z. Wang, J. Hu, M. Liu, W. Niu, R. Zhang, F. Huang, and D. Chen, 241, 118515 (2022).

Intrachain photophysics of a donor–acceptor copolymer

H. Nho, W. Park, B. Lee, S. Kim, C. Yang, and O. Kwon, Physical Chemistry Chemical Physics 4 (24), 1982-1992 (2022).

Novel Synthetic Dopamine Analogues: Carbon-13/Nitrogen-15 Isotopic Labeling and Fluorescence Properties

C. Lar, S. Radu, E. Gál, A. Fălămaş, J. Szücs‑Balázs, C. Filip, and A. Petran, Analytical Letters, 1-13 (2022).


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HARPIA Comprehensive Spectroscopy System

Broshure & datasheet.

Rev. 06/09/2022. Size 8.1 MB.

HARPIA Selection Guide

HARPIA components selection guide.

Rev. 14/11/2021. Size 1.1 MB.

Femtosecond Laser Systems for Science

Product catalog.

Rev. 16/09/2022. Size 15.2 MB.


Product catalog in Chinese.

Rev. 16/09/2022. Size 15.8 MB.