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.

HARPIA-TA – Transient Absorption, Pump-Probe

Configuration	UV-VIS	VIS	VIS-NIR	UV-VIS-NIR	MIR
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				–

Higher repetition rates available; contact sales@lighton.com for details.

HARPIA-TA-FP – Flash Photolysis Extension – Nanosecond Transient Absorption

Extension	Flash Photolysis
Measurement range	450 – 2400 nm
Delay range	up to 8 ms
Delay resolution	100 ps
Temporal resolution	2 ns

Dimensions

Model	Physical dimensions (L × W × H) ¹⁾
HARPIA-TA	730 × 420 × 160 mm
HARPIA-TA Sample chamber area (L × W) ²⁾	205 × 215 mm

Without external spectrograph.
External sample placement option is available.

Images & Drawings

HARPIA-TA drawing

HARPIA optical layout for pump-probe experiments

HARPIA-TA ultrafast transient absorption spectrometer

HARPIA-TA with internal cryostat mounting option

HARPIA‑TA body with microscopy module installed

HARPIA‑TA with microscopy module installed

HARPIA-TA with microscopy module installed

HARPIA-TA with bulk module installed

HARPIA-TA – Ultrafast Transient Absorption Spectrometer

Pump probe Measurement Data Samples

Spectral dynamics of beta-carotene in solution acquired using HARPIA-TA. Measurement conditions: 100 kHz repetition rate, 490 nm pump wavelength, < 10 nJ pump pulse energy, 13 s per spectrum (per delay point) acquisition time.

Pump-probe dynamics of GaAs wafer in IR measured using signal and reference single-channel detectors. Measurement conditions: 75 kHz repetition rate, 700 nm pump wavelength, 1 s/point acquisition time.

Publications

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Datasheets

Catalogs

Femtosecond Laser Systems for Science

Product catalog.

Rev. 15/01/2023. Size 16.1 MB.

飞秒激光器飞秒科研系统

Product catalog in Chinese.

Rev. 29/12/2022. Size 14.7 MB.

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HARPIA-TA Ultrafast Transient Absorption Spectrometer

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