KEYWORDS: Tin, Oxides, Indium, Thin films, Signal processing, Phase matching, Nonlinear optics, Sum frequency generation, Second harmonic generation, Prisms
Using a low-power laser, and a thin film of indium tin oxide (ITO) in the Kretschmann configuration, we characterize the efficiency of optical nonlinearities of ITO as an epsilon near zero material across a wide range of wavelengths. Additionally, we explore the relationship between the zero-epsilon wavelength and the efficiency of nonlinear interaction. This was accomplished by testing multiple ITO slides with different zero-epsilon wavelengths and comparing the results.
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