Abstract
In an industrial setting, only optical methods are fast enough to tease out the killer defects that may render a computer chip inoperable. Comprised of billions of periodic nanoelectronic devices, they yield optical responses like form birefringence, even for deep-ultraviolet (DUV) light. This study reveals how the form-dependent optical response changes as the wavelength approaches the periodicity, by realistically comparing five wavelengths numerically. Surprising results are obtained at 47 nm. Similarly optimizing sets of wavelengths, materials, and their optical constants may even foster improved optical materials in the far-ultraviolet regime.
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