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Optical Limiting With Neutral Nickel Dithiolene Complexes

Published online by Cambridge University Press:  10 February 2011

W. L. Tan ,
W. Ji ,
J. L. Zuo ,
J. F. Bai ,
X. Z. You ,
J. H. Lim ,
S. S. Yang ,
D. J. Hagan  and
E. W. Van Stryland
W. L. Tan
Affiliation:
Physics Department, National University of Singapore, Singapore 119260, Republic of Singapore
W. Ji
Affiliation:
Physics Department, National University of Singapore, Singapore 119260, Republic of Singapore
J. L. Zuo
Affiliation:
Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
J. F. Bai
Affiliation:
Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
X. Z. You
Affiliation:
Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
J. H. Lim
Affiliation:
School of Optics/CREOL, University of Central Florida, Orlando FL 32816-2700, USA
S. S. Yang
Affiliation:
School of Optics/CREOL, University of Central Florida, Orlando FL 32816-2700, USA
D. J. Hagan
Affiliation:
School of Optics/CREOL, University of Central Florida, Orlando FL 32816-2700, USA
E. W. Van Stryland
Affiliation:
School of Optics/CREOL, University of Central Florida, Orlando FL 32816-2700, USA
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Abstract

We report an investigation of optical-limiting behavior in two neutral nickel complexes with multi-sulfur 1,2 dithiolene ligands, [Ni(medt)2] I (medt = 5,6-dihydro-6-methyl-1,4-dithiin-2,3- dithiolate) and [Ni(phdt)2] 2 (phdt = 5,6-dihydro-5-phenyl-l,4-dithiin-2,3-dithiolate) in benzene solution. The fluence-dependent transmission of the complexes was observed with nanosecond and picosecond laser pulses at 532-nm wavelength. The limiting thresholds of the complexes were ˜0.3 J/cm2, when measured with the picosecond pulses. Both picosecond time-resolved pump-probe and Z-scan measurement revealed that the limiting effects should originate from excited-state absorption and refraction. The transparency window (400˜900 nm), observed in the linear absorption spectra of the complexes, indicated that their limiting response should cover a wider range than those of fullerenes and phthalocyanines.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 597: Symposium PP – Thin Films for Optical Waveguide Devices & Materials … , 1999 , 413
Copyright
Copyright © Materials Research Society 2000

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