Abstract
In this study, the polyacrylamide gel was chosen as a host material and the two rhodamine dyes: rhodamine 6 G (Rh-6 G) and rhodamine B (Rh-B) were chosen as guest molecules in order to prepare a novel guest–host systems (dye-loaded polyacrylamide gel) with promising optical properties. For the first time different concentration of binary mixture of dyes (Rh-6 G/Rh-B) doped polyacrylamide gel were prepared, the optical absorption and amplified spontaneous emission (ASE) of the dye doped polyacrylamide, which is pumped by the second harmonic (532 nm) of Nd-YAG laser, were measured. Energy transfer from Rh-6 G to Rh-B has been studied. The critical transfer distance R0 has large value (12.5 A0). The gain and amplified spontaneous emission (ASE) efficiency for Rh-6 G and Rh-B doped polyacrylamide were measured under the same experimental condition. The optical gain was 4.5 cm−1 for Rh-6 G and 2.5 cm−1 for Rh-B and the amplified spontaneous emission (ASE) efficiency was 30% for Rh-6 G and 26% for Rh-B. The photostability for fresh samples of (Rh-6 G and Rh-B) and after 24 hours from the first use were studied. A self-healing phenomenon for the samples were observed.
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