Fig. 1.

Experimental setup used to measure the optical properties of each sample included in the study. (a) Reflection measurements: to calculate the sample reflectance, the sample was first analyzed, followed by the reflectance standard and finally, a reflection measurement with the empty sample port. (b) Transmission measurements: the sample was first measured, then a measurement with the empty sample port was performed and finally, a measurement with no illumination from the lasers was performed.