Fig. 1. Real part of the dielectric function of isopropanol (IPA) without optical excitation (black line) and with optical excitation leading to the three different electron concentrations of 50, 100 ...
We investigated the propagation of femtosecond laser pulses through a metamaterial that has a negative index of refraction for wavelengths around 1.5 micrometers. From the interference fringes of a ...
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