Visible and NIR Luminescence Laboratory

Luminescence measuremets are performed using 1 argon laser, 2 tunable Ti:Sapphire lasers (figure 1), 980 nm diode laser, Nd-YAG laser, Dye laser or a Xe lamp with a monocromator as excitation sources.

Excitation can be performed in waveguide, bulk and butt coupling with microspope objective configurations.

For NIR measurements luminescence was dispersed by a 320 mm single-grating monochromator with a minimum resolution of 0.5 nm (figure 2 ). The light was detected using an Si/InGaAs two color photodiode (400-1700nm figure 3 ) and a standard lock-in technique. Decay curves were obtained by recording the signal with a digital oscilloscope. A thermoelectrically cooled NIR-PMY module Hamamatsu H9170-75 is aviable for NIR luminescence measurements in the 950-1700nm region in photon counting configuration.

For luminescence measurements in the visible region are performed using a double monocromator with photon counting system (figure 4 )

Figure 1: two tunable Ti:Sapphire lasers that cover the excitation range from 750 to 1010nm

Figure 2: NIR luminescence appatatus

Figure 3: Detail of the NIR luminescence apparatus: two color Si/InGaAs and Hamamatsu H9170-75 photmultiplier are visible.

Figure 4: Visible luminescence appatatus