Simultaneous detection of Raman scattering and near-infrared photoluminescence in one imaging microscope

We describe a microscope which allows simultaneous acquisition of Raman and near-infrared photoluminescence (NIR-PL) spectra and images. The instrument comprises an appropriately modified commercial Raman microscope, utilizes 785 nm excitation laser, and includes two detection channels for Raman and PL within the spectral ranges of ∼787-1000 nm (∼40-2700 cm(-1) Raman shift) and ∼1050-1600 nm, respectively. The configuration can however be easily adapted for other excitation wavelengths and detection ranges. The possibility to simultaneously measure both Raman and NIR-PL spectra - exactly at the same sample locations - can be useful for various applications, for instance, for the characterisation of single-walled carbon nanotubes.