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3-D Scanning Mid-IR Imaging of Buried Structures Using Extremely Nondegenerate Two-photon Absorption in a GaN Photodiode

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Abstract

We demonstrate a scanning 3-D IR imaging technique using extremely nondegenerate two-photon absorption in an uncooled GaN photodiode, and obtain ~2 µm depth resolution at a wavelength of ~5 µm in buried semiconductor structures.

© 2015 Optical Society of America

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