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Title: Studies of third-order optical nonlinearity and nonlinear absorption in tetra tolyl porphyrins using degenerate four wave mixing and Z-scan
Authors: Rao, S.V.
Naga Srinivas, N.K.M
Rao, D.N.
Giribabu, L.
Philip, Reji
Maiya, B.G.
Kumar, G.R.
Issue Date: 2000
Publisher: Elsevier
Citation: Optics Communications, 2000, Vol.182, p255-264
Abstract: We present our experimental results on the measurement of third-order optical nonlinearity in the ns and ps domain, in several Tetra Tolyl Porphyrin molecules (TTP), using degenerate four wave mixing (DFWM) and Z-Scan techniques. Our results indicate a very high value of nonlinearity for these molecules in the ns domain and reasonably high values in the ps domain. They are found to exhibit a strong nonlinear absorption at both 532 nm and 600 nm. The high value of nonlinearity for ns pulses is attributed to higher excited singlet and triplet states. Time-resolved studies indicate an ultra-fast temporal evolution of the nonlinearity in these molecules.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0030-4018
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Copyright: 2000 Elsevier
Appears in Collections:Research Papers (LAMP)

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