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"Interaction-Free" Imaging
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Using the complementary wave- and particle-like natures of photons, it is possible to make ``interaction-free'' measurements where the presence of an object can be determined with no photons being absorbed. We investigated several ``interaction-free'' imaging systems, i.e. systems that allow optical imaging of photosensitive objects with less than the classically expected amount of light being absorbed or scattered by the object. With the most promising system, we obtained high-resolution (10 \mu m), one-dimensional profiles of a variety of objects (human hair, glass and metal wires, cloth fibers), by raster scanning each object through the system. We discuss possible applications and the present and future limits for interaction-free imaging.
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Cited by 2 Pith papers
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Interaction-free measurement of multiple objects using a universal integrated photonic processor
Experimental sequential interaction-free measurements of up to five objects with one photon on an integrated photonic processor confirm theoretical predictions after error mitigation.
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Interaction-free measurement of multiple objects using a universal integrated photonic processor
A single photon sequentially probing five emulated absorbers on a programmable photonic processor can reveal all five without being absorbed, matching theoretical efficiency predictions.
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