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Large Two-Photon Absorption Enhancement with Extremely Nondegenerate Photons

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Abstract

Using extremely nondegenerate photons in frequency (energy ratios >10/1), we measure 2-4 orders of magnitude enhancement of two-photon absorption in semiconductors compared to the degenerate case. We demonstrate sub-femtosecond gated detection directly on semiconductor diodes.

© 2011 Optical Society of America

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