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Two-photon technology

A new dimension

Conventional optical technologies store data on the surface of a recording medium. Two-photon technology, which relies on overlapping light beams, can be used for three-dimensional multilayer storage and promises capacities of up to 10 Tbyte on a DVD-size disk.

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Figure 1: Two-photon processes.
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Figure 3: Single-beam two-photon recording system and schematic diagram.


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The authors would like to acknowledge the work of Alexander Dvornikov in the design, synthesis and application of 3D storage media.

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Correspondence to Peter M. Rentzepis.

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Walker, E., Rentzepis, P. A new dimension. Nature Photon 2, 406–408 (2008).

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