Nonlinear absorption of new mesoionic compounds

✍ Scribed by V. Pilla; Cid B. de Araújo; B.F. Lira; A.M. Simas; J. Miller; P.F. Athayde-Filho

• Book ID: 104073298
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 126 KB
• Volume: 264
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2006.02.012

✦ Synopsis

The nonlinear absorption of new mesoionic compounds (MIC) was investigated using nanosecond laser pulses with wavelengths at 570, 605 and 618 nm. Nonlinear absorption cross-sections, r 2 % 10 À45 cm 4 s/photon, larger than any recorded in the literature, were obtained due to the introduction of p-CF 3 -C 6 H 4 electron-acceptor and p-CH 3 -C 6 H 4 or p-CH(CH 3 ) 2 -C 6 H 4 electron-donor groups in the MIC ring. The large values of r 2 , the ease of synthesis of these compounds and their marked stability, make them promising candidates for photonic applications.