A comparative study on the optical limiting properties of different nano spinel ferrites with Z-scan technique

Journal Article · Wed Aug 15 04:00:00 EDT 2012 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.04.067· OSTI ID:22215161

Thomas, Jeevan Job; Krishnan, Shiji ^[1]; Sridharan, K.; Philip, Reji ^[2]; Kalarikkal, Nandakumar ^[1]

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1. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, Kerala 686560 (India)
2. Light and Matter Physics Group, Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bangalore 560080 (India)

Highlights: ► First report in which the optical limiting properties of five different nano spinel ferrites are compared. ► The obtained nonlinearity fits to a two-photon like absorption process. ► Except for NiFe{sub 2}O{sub 4}, the observed nonlinearity has contributions from excited state absorption. ► A size dependent optical limiting response is obtained. ► Among the investigated ferrites, ZnFe{sub 2}O{sub 4} is found to be a better candidate for the optical limiting applications. -- Abstract: We report the optical limiting properties of five different spinel ferrites, NiFe{sub 2}O{sub 4}, Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4}, ZnFe{sub 2}O{sub 4}, Ni{sub 0.5}Co{sub 0.5}Fe{sub 2}O{sub 4}, and CoFe{sub 2}O{sub 4} with an average particle grain size of 8 nm. The optical limiting properties are investigated using the open aperture Z-scan technique. The obtained nonlinearity fits to a two-photon like absorption process. Except for NiFe{sub 2}O{sub 4}, the observed nonlinearity has contributions from excited state absorption. The optical limiting response is also studied against particle size and the nonlinearity is found to increase with increasing particle size within the range of our investigations. On comparing the optical limiting properties, ZnFe{sub 2}O{sub 4} is found to be a better candidate for the optical limiting applications. To the best of our knowledge, this is the first report where the optical limiting properties of spinel ferrites are compared.

• OSTI ID: 22215161
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 8 Vol. 47; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
COBALT OXIDES
EXCITED STATES
FERRITE
FERRITES
GRAIN SIZE
OPTICAL PROPERTIES
PARTICLE SIZE
SPINELS