Time-Correlated Single Photon setup

Time-Correlated Single Photon Counting Time- and Spectrally Resolved Spectroscopy Setup

Time Resolved Photoluminescence measurements are performed using a fully automatized setup, controlled by a computer interface, which has been developed to allow for control of the wavelength, repetition rate and power of the excitation and the detection wavelength range. The optical excitation is provided by two Fianium WhiteLase modelocked, high-power supercontinuum lasers. The lasers have enhanced emission in the UV and Infrared respectively, and when coupled with the Fianium LLTF, AOTF or Superchrome filters enable wavelength and bandpass tunability over a wide excitation energies range. Additionally the repetition rate of the lasers can be varied between 100 kHz and 40 MHz, allowing studying decay dynamics with lifetimes going from nanoseconds to tens of microseconds. The optical setup is modular and can be configured to work in a confocal geometry or with the excitation and collection being at different angles. The emitted photoluminescence can be spectrally resolved using a monochromator. The decay dynamics are then recorded using an IDQ avalanche photodiode connected to a time-correlated single photon counting (TCSPC) Becker &Hickl GmbH SP-140 card, for a maximum resolution of 50 ps.

Excitation Tunability: wavelength range from 350 to 2500 nm

Optical Power: up to 100 mW

Repetition Rate Tunability: 100 kHz to 40 MHz

Time Resolution: 50ps