Ultrafast Transient Absorption Spectrometer HARPIA-TA

  • Market-leading sensitivity
  • 330 nm – 24 μm spectral range
  • Probe delay ranges from 2 to 8 ns
  • Pump pulse energies down to nJ
  • Cryostat and peristaltic pump support

Features

  • Market-leading sensitivity
  • 330 nm – 24 μm spectral range
  • Probe delay ranges from 2 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 330 – 1600 nm range, while a monochromatic probe can be used up to 24 μm. The probe delay stage is configurable from 2 ns 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.

Model HARPIA-TA
Configuration UV / VIS / NIR / SWIR MIR
Probe excitation wavelength 1030 nm 515 nm 800 nm n/a 1)
Probe spectral range 460 – 1600 nm 350 – 750 nm 330 – 1400 nm 190 nm – 16000 nm 2)
Detection spectral range 200 – 1100 nm / 900 – 1700 nm / 900 – 2600 nm 2 – 13 μm 3)
Delay range 2 ns / 4 ns / 8 ns
Delay resolution 2.1 fs / 4.2 fs / 8.3 fs
Laser repetition rate 1 – 1000 kHz
Temporal resolution < 1.4× pump or probe pulse duration, whichever is longer
Maximum data acquisition rate 4000 spectra/s
SNR 4) 250 : 1
  1. A wavelength-tunable source such as ORPHEUS-HP is used instead of a laser-excited white-light continuum.
  2. An extended tuning range of ORPHEUS‑HP; see specification for more details. Also applicable to UV / VIS / NIR / SWIR configuration.
  3. Up to 24 μm available upon request; contact sales@lighton.com for more details.
  4. 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.
Model HARPIA-TA
Delay resolution 100 ps
Temporal resolution 2 ns
SNR 1) 40 : 1
  1. 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.
Model HARPIA-TA
Physical dimensions (L × W × H) 1) 730 × 420 × 160 mm
Internal 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).

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).

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).

Photocatalytic overall water splitting under visible light enabled by a particulate conjugated polymer loaded with iridium

Y. Bai, C. Li, L. Liu, Y. Yamaguchi, B. Mounib, H. Yang, A. Gardner, M. Zwijnenburg, N. Browning, A. Cowan et al., (2022).

Photocycle of point defects in highly- and weakly-germanium doped silica revealed by transient absorption measurements with femtosecond tunable pump

V. D. Michele, A. Sciortino, M. Bouet, G. Bouwmans, S. Agnello, F. Messina, M. Cannas, A. Boukenter, E. Marin, S. Girard et al., Scientific Reports 1 (12) (2022).

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