Ultrafast Transient Absorption Spectrometer HARPIA-TA

  • Market-leading sensitivity
  • 350 nm – 24 μm measurement range
  • Probe delay ranges up to 8 ns
  • Pump pulse energies down to nJ
  • Cryostat and peristaltic pump support


  • Market-leading sensitivity
  • 350 nm – 24 μm measurement range
  • Probe delay ranges up to 8 ns
  • Pump pulse energies down to nJ
  • Cryostat and peristaltic pump support

The HARPIA-TA ultrafast transient absorption spectrometer provides pump-probe measurement functionality in a HARPIA system. Several probe light configurations and detection options are available: from a photodiode for single‑wavelength detection to white-light supercontinuum probing combined with spectrally-resolved broadband detection. HARPIA-TA features extensive automation options providing pump and probe beam position tracking and alignment, pump polarization control, supercontinuum generator switching, sample positioning, as well as switching between transient absorption and transient reflection measurements. Broadband probe options cover a 350 – 1600 nm range, while a monochromatic probe can be used up to 24 μm. The probe delay stage is configurable from up to 8 ns.

HARPIA-TA features market-leading sensitivity of 0.05 mOD (10-4 ΔT/T) and can be operated at high repetition rates of up to 1 MHz when used with a PHAROS or CARBIDE laser and an ORPHEUS series OPA, which allows the study of transient absorption dynamics with excitation pulse energies down to several nanojoules.

HARPIA-TA is compatible with cryostats and peristaltic pumps, and the capabilities of the spectrometer are extendable using expansion modules.

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 sales@lighton.com for details.
Extension Flash Photolysis
Measurement range 450 – 2400 nm
Delay range up to 8 ms
Delay resolution 100 ps
Temporal resolution 2 ns
Model Physical dimensions (L × W × H) 1)
HARPIA-TA 730 × 420 × 160 mm
Sample chamber area (L × W) 2)
205 × 215 mm
  1. Without external spectrograph.
  2. External sample placement option is available.

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).

Cobalt(III) Carbene Complex with an Electronic Excited-State Structure Similar to Cyclometalated Iridium(III) Compounds

N. Sinha, B. Pfund, C. Wegeberg, A. Prescimone, and O. S. Wenger, Journal of the American Chemical Society 22 (144), 9859-9873 (2022).

Effects of polyethylene oxide particles on the photo-physical properties and stability of FA-rich perovskite solar cells

R. K. Koech, Y. A. Olanrewaju, R. Ichwani, M. Kigozi, D. O. Oyewole, O. V. Oyelade, D. M. Sanni, S. A. Adeniji, E. Colin‑Ulloa, L. V. Titova et al., Scientific Reports 1 (12) (2022).

Enhanced transfer efficiency of plasmonic hot-electron across Au/GaN interface by the piezo-phototronic effect

Y. Zhu, C. Deng, C. He, W. Zhao, Z. Chen, S. Li, K. Zhang, and X. Wang, Nano Energy 93, 106845 (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).

Highly nonlinear dipolar exciton-polaritons in bilayer MoS2

B. Datta, M. Khatoniar, P. Deshmukh, F. Thouin, R. Bushati, S. D. Liberato, S. K. Cohen, and V. M. Menon, Nature Communications 1 (13) (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).


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