Table 1: Experimental linear absorption coefficient ( ), heat conductivity ( ), thermal nonlinear refractive index ( ), thermo-optical coefficient ( ), and degree of nonlocality ( ) of the investigated ionic liquids.

Sample (cm−1) (W/m K) [43] (cm2/W) (K−1)

BMI-Tf2N0.1610.128(−3.9 ± 1.2) 10−8(−9.6 ± 2.9) 10−5(0.96 ± 0.38)
HMI-Tf2N0.0710.127(−1.9 ± 0.6) 10−8(−9.3 ± 2.8) 10−5(1.06 ± 0.43)
OMI-Tf2N0.2400.128(−5.1 ± 1.5) 10−8(−12.2 ± 3.7) 10−5(0.83 ± 0.33)
DMI-Tf2N0.3190.132(−1.8 ± 0.5) 10−8(−2.5 ± 0.8) 10−5(0.97 ± 0.39)