Skip to Content

Five-dimensional optical recording mediated by surface plasmons in gold nanorods" by Peter Zijlstra, James Chon, and Min Gu published in Nature

Friday May 22 2009

Gold nanorods have unique optical properties, which vary with the color and the polarization of the incoming light. Peter Zijlstra et al. from the CMP have exploited these features to achieve for the first time five-dimensional optical recording. Both the polarization of light and its wavelength are used to selectively reshape gold nanorods in a polymer matrix, which is capable of recording 9 independent bits in the same focal volume.

To read out the recording, the authors used two-photon luminescence, which allows non-destructive and cross-talk free detection due to its high wavelength and angular sensitivity compared to conventional linear detection. Recording was demonstrated in 10 closely spaced layers, resulting in a storage capacity of 1.6 Terabyte per DVD-sized disc. Further reduction of the layer spacing could potentially increase the disk capacity to 7 Terabyte.

The paper has been published in the May 21 2009 issue of Nature and appeared on the front cover.