Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

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.

This is a preview of subscription content, access via your institution

Access options

Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Figure 1: Two-photon processes.
Figure 2
Figure 3: Single-beam two-photon recording system and schematic diagram.


Figure 4



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

Author information

Authors and Affiliations


Corresponding author

Correspondence to Peter M. Rentzepis.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

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

Download citation

  • Issue Date:

  • DOI:


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing