Nonlinear Optical Studies of DNA Doped Rhodamine 6G-PVA Films Using Picosecond Pulses


We present our results from the measurements of third-order optical nonlinearity in DNA doped Rhodamine 6G/PVA films achieved through Z-scan measurements using ~2 picosecond (ps) pulses at a wavelength of 800 nm. The films demonstrated negative nonlinear refractive index (n2) with magnitudes of (0.065 - 2.89) × 10–14 cm2/W with varying concentration of DNA. Open aperture data demonstrated strong two-photon absorption with a magnitude of ~1.6 cm/GW for films doped with 2 wt% of DNA. The recovery time of excited state population, retrieved from the degenerate pump-probe experimental data, was <4 ps. These data suggests that DNA is promising material for applications such as optical switching.

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Sreeja, S. , Nityaja, B. , Swain, D. , Nampoori, V. , Radhakrishnan, P. and Rao, S. (2012) Nonlinear Optical Studies of DNA Doped Rhodamine 6G-PVA Films Using Picosecond Pulses. Optics and Photonics Journal, 2, 135-139. doi: 10.4236/opj.2012.23019.

Conflicts of Interest

The authors declare no conflicts of interest.


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