Nonlinear optical properties of benzimidazobenzophenanthroline type ladder polymers
- 19 February 1990
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 56 (8) , 712-714
- https://doi.org/10.1063/1.102689
Abstract
Third‐order optical susceptibilities (χ(3)) of poly{(7‐oxo‐7, 10H‐benz[de]imidazo[4’,5’:5,6]benzimidazo [2,1‐a]isoquinoline‐3,4:10,11‐tetrayl)‐carbonyl}, referred to as BBL, and poly(6,9‐dihydro‐6,9‐dioxobisbenzimidazo[2,1b:1’,2’j] benzo[1mn]‐[3,8]phenanthroline‐3,12‐diyl), known as BBB, have been determined using the technique of degenerate four‐wave mixing (DFWM) at 1.064 μm. BBL has a χ(3)xxxx=(1.5±0.4)×10−11 esu, three times as large as that of BBB and 38 times as large as that of CS2. Electrochemical doping led to a small (<30%) increase in the third‐order susceptibility of BBL.Keywords
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