Ultrasensitive mid-infrared up-conversion imaging at few-photon level

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Abstract

We demonstrated few-photon-level mid-infrared imaging at 3.39 μm by efficient frequency up-conversion. The quantum frequency up-conversion efficiency of mid-infrared photons was high to 32.9%, while mid-infrared images were up-converted with the quantum efficiency of 12.5%. The mid-infrared imaging sensitivity was improved by counting the frequency up-conversion photons temporally confined within the time-window of the pump pulse. The frequency up-conversion system induced a background noise of 1.1 × 103 counts per second.

Original languageEnglish
Article number241110
JournalApplied Physics Letters
Volume102
Issue number24
DOIs
StatePublished - 17 Jun 2013
Externally publishedYes

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