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Reverse saturable absorption of lanthanide bisphthalocyanines and their application for optical switches |
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| Authors: | Mark O Liu Andrew Teh Hu Tai-Huei Wei |
| Institution: | a Department of Chemical Engineering, National Tsing-Hua University, 101, Kuang Fu Rd, Sec.2, Hsinchu 30043, Taiwan, ROC b Union Chemical Laboratories, Industrial Technology Research Institute, Hsinchu 300, Taiwan, ROC c Department of Physics, National Chung-Cheng University, Chia-Yi, Taiwan, ROC |
| Abstract: | We have investigated reverse saturable absorption (RSA) of tetrakis(2,9,16,23-tert-butyllanthanide bisphthalocyanines)(M(TBPc)2, M=Lu, Dy, Tb) with Z-scan technique. Furthermore, lanthanide bisphthalocyanines have also been utilized for optical switches based on their RSA performance. However, the experimental results reveal that the performances of RSA and optical switches for M(TBPc)2 (M=Lu, Dy, Tb) are poorer than that of tetrakis(2,9,16,23-tert-butylcopper phthalocyanines) (Cu(TBPc)) due to strong intramolecular π-π interaction between the two Pc rings. |
| Keywords: | Optical switch Bisphthalocyanine Reverse saturable absorption Z-scan Optical limiting |
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