Saturable and Reverse Saturable Absorption in Nanocomposite Films of Naphthol Green B Dye-polymer System

Devi, Sudeepa; Sreeja, S.; Fröbel, P.; Suresh, S.; Muneera, C. I.; Predeep, P.; Thakur, M.; Varma, M. K. Ravi

doi:10.1063/1.3643632

Cited by 1 publication

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“…The most common strategies for OL investigation relate to their incorporation in polymeric thin films. For instance, naphthol Green B dye ( 9 , Chart ) embedded in PVA films was fabricated, and their nonlinear absorption properties were investigated using the Z -scan technique under excitation with 5 ns laser light pulses at 532 nm . The materials exhibited saturable absorption at the lowest intensity and concentration, switching to RSA on increasing either laser intensity or dye concentration.…”

Section: Hybrid Organic–inorganic Materialsmentioning

confidence: 99%

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

2016

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The control of luminous radiation has extremely important implications for modern and future technologies as well as in medicine. In this Review, we detail chemical structures and their relevant photophysical features for various groups of materials, including organic dyes such as metalloporphyrins and metallophthalocyanines (and derivatives), other common organic materials, mixed metal complexes and clusters, fullerenes, dendrimeric nanocomposites, polymeric materials (organic and/or inorganic), inorganic semiconductors, and other nanoscopic materials, utilized or potentially useful for the realization of devices able to filter in a smart way an external radiation. The concept of smart is referred to the characteristic of those materials that are capable to filter the radiation in a dynamic way without the need of an ancillary system for the activation of the required transmission change. In particular, this Review gives emphasis to the nonlinear optical properties of photoactive materials for the function of optical power limiting. All known mechanisms of optical limiting have been analyzed and discussed for the different types of materials.

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Section: Hybrid Organic–inorganic Materialsmentioning

confidence: 99%