HARPIA-MM is a microscopy module add-on to the HARPIA 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.

HARPIA-MM allows the acquisition of time-resolved spectra at a fixed position, difference absorption images at a fixed probe delay, and other types of data. Switching between bulk and microscopic pump‑probe modes is implemented using self-contained modules, allowing experiment reconfiguration without disturbing the sample. The microscopy module features a brightfield mode to observe the sample and to determine the pump-probe spot location.

HARPIA-MM – Transient absorption and Reflection microscopy

Model	HARPIA-MM
Spatial resolution ¹⁾	monochromatic	polychromatic
Spatial resolution ¹⁾	< 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

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.
Depends on the objective used.

Images & Drawings

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

Modules for bulk and microscopic pump-probe modes

Optical scheme for transmission mode of HARPIA-MM

Optical scheme for reflection mode of HARPIA-MM

Optical scheme for brightfield mode of HARPIA-MM

HARPIA-MM – Microscopy Module

Single perovskite crystallite pump-probe spectral kinetics, pump at 400 nm. Pump-probe spot marked by the small circle

Single perovskite crystallite pump-probe kinetics. Pump-probe spot marked by the small circle. Measurement conditions: 400 nm pump wavelength, 200 kHz repetition rate, 2 nJ pump pulse energy, 0.5 s/spectrum acquisition time, and Plan Fluor 4x/0.13 objective.

Datasheets