Comprehensive Spectroscopy System HARPIA
APPLICATIONS
- 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
Features
APPLICATIONS
- 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.
- A wavelength-tunable source such as ORPHEUS-HP is used instead of a laser-excited white-light continuum.
- An extended tuning range of ORPHEUS‑HP; see specification for more details. Also applicable to UV / VIS / NIR / SWIR configuration.
- Up to 24 μm available upon request; contact sales@lighton.com for more details.
- Estimated as the standard deviation of a set of 2500 spectra measured in SCHOTT OG530 glass with 54 nJ, 370 nm pump and > 4.5 mOD at a maximum of the spectrum. Not applicable to all samples and configurations.
- Depends on the gating source, full range covered with different nonlinear crystals.
- Limited by the spectral bandwidth of the gating pulse.
- Estimated as the standard deviation of a set of 100 points at 50 ps intervals measured in Rhodamine 6G dye at an upconverted wavelength of 360 nm using a PHAROS laser running at 150 kHz repetition rate; assuming 0.5 s averaging per point. Not applicable to all samples and configurations.
- Spectral range is extendable to NIR; contact sales@lightcon.com for details.
- Different models available; contact sales@lightcon.com for details.
- Maximum measurement range can be extended with a phosphorescence upgrade.
- Estimated by fitting a kinetic trace measured in Rhodamine 6G solution at 580 nm with multiple exponents, subtracting the fit from the data and taking the ratio between the standard deviation of the residuals and the 0.5× maximum signal value, at 250 kHz repetition rate; assuming 5 s averaging per trace. Not applicable to all samples and configurations.
- Estimated as the standard deviation of a set of 2000 spectra measured in SCHOTT OG530 glass with 515 nm pump and > 10 mOD at a maximum of the spectrum. Not applicable to all samples and configurations.
- 8 ns delay range is available on request; contact sales@lightcon.com for details.
- Depends on the spectral range and the objective used; provided values represent best-effort case.
- Depends on the objective used; contact sales@lightcon.com for details.
- Without external spectrograph.
- External sample placement option is available.






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








The HARPIA spectroscopy system achieves an excellent signal‑to‑noise ratio at high repetition rate and low energy excitation conditions. The graphs below compare the signal-to-noise ratio (SNR) of difference absorption spectra obtained with a Ti:Sapphire laser operating at 1 kHz and a PHAROS laser operating at 64 kHz with the same acquisition time.
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).
Ultrafast Excited-State Proton Transfer of a Cationic Superphotoacid in a Nanoscopic Water Pool
H. Nho, A. Adhikari, and O. Kwon, The Journal of Physical Chemistry B (2022).
Charge photogeneration and recombination in ternary polymer solar cells based on compatible acceptors
R. Hu, W. Zhang, Z. Xiao, J. Zhang, X. Su, G. Wang, J. Chen, X. He, and R. Wang, Journal of Materials Science 25 (56), 14181-14195 (2021).
Effect of Substituents at Imide Positions on the Laser Performance of 1,7-Bay-Substituted Perylenediimide Dyes
R. Muñoz‑Mármol, P. G. Boj, J. M. Villalvilla, J. A. Quintana, N. Zink‑Lorre, N. Sastre‑Santos, J. Aragó, E. Ortí, P. Baronas, D. Litvinas et al., The Journal of Physical Chemistry C (2021).
Energy transfer in (PEA)2FAn-1PbnBr3n+1 quasi-2D perovskites
D. Litvinas, R. Aleksiejūnas, P. Ščajev, P. Baronas, V. Soriūtė, C. Qin, T. Fujihara, T. Matsushima, C. Adachi, and S. Juršėnas, Journal of Materials Chemistry C (2021).
Excited-state properties of Y-series small molecule semiconductors
G. Wen, R. Hu, X. Su, Z. Chen, C. Zhang, J. Peng, X. Zou, X. He, G. Dong, and W. Zhang, Dyes and Pigments 192, 109431 (2021).
Ground- and excited-state characteristics in photovoltaic polymer N2200
G. Wen, X. Zou, R. Hu, J. Peng, Z. Chen, X. He, G. Dong, and W. Zhang, RSC Advances (2021).
High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor
Z. Jia, S. Qin, L. Meng, Q. Ma, I. Angunawela, J. Zhang, X. Li, Y. He, W. Lai, N. Li et al., Nature Communications 1 (12) (2021).
High-Lying 31Ag Dark-State-Mediated Singlet Fission
L. Wang, T. Zhang, L. Fu, S. Xie, Y. Wu, G. Cui, W. Fang, J. Yao, and H. Fu, Journal of the American Chemical Society 15 (143), 5691-5697 (2021).
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