Abstract
The nonlinear optical properties of two ionic liquids,1-n-butyl-3-methylimidazolium tetrafluoroborate([BMI]BF4) and1-n-butyl-3-methylimidazolium hexafluorophosphate([BMI]PF6), have beeninvestigated using the Z-scan technique. These compounds are liquid at room temperature and present a strongionic nature. Nonlinear refraction and absorption, and thermo-optical measurements forboth ionic liquids were performed using two different laser wavelengths, 514 nm and810 nm, in the continuous wave and femtosecond regimes, respectively. It wasobserved that those specimens have large negative nonlinear refractive indexes andthermo-optical coefficients, but nonlinear absorption was not observed. Differentdispersion relations were observed depending on the ionic liquid anion, which maybe related to the distinct structures of these compounds. This result indicatesthat ionic liquids are suitable media for the investigation of nonlocal nonlinearphenomena.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
