S2 Holographic Materials


S2 holographic materials encompass both atomic scale memory and processing as well as inherent large scale parallel addressing. The most promising S2 sensor materials are crystalline structures doped with selective rare-earth ions, which have extremely wideband optical absorption lines. These lines are in essence made up of multiple stacked resonances each with an ultra-narrow (high-resolution) spectral response. Thus these materials not only have the ability to remember if they were illuminated by a light beam (like an optical disk), but also the frequency and amplitude of the light that illuminated them.


by definition, s2 materials are inhomogeneously broadened atomic absorbers (typically in the visible to infrared region of the spectrum), where the homogeneous LINE WIDTH defines the spectral resolution and the inhomogeneous linewidth represents the instantaneous processing bandwidth. Most of the recent advances in S2 technology have happened in rare-earth ion doped systems, where spectral resolutions of 25 kHz are achievable with instantaneous bandwidths greater than 25 GHz, giving effective time-bandwidth products 1 million times larger.

These unique processing capabilities makes products using S2 materials, such as our S2-EBAC device, well suited for signal processing.


The high quality S2 materials that are being used in the S2-ebac device demonstrate multiple attractive characteristics such as:

  • Ultra wide bandwidth absorption response (multi-GHz)

  • Ultra narrow atomic resonances (sub kHz, narrowest measured in any solid)

  • Memory persistence time (tens of milliseconds)

  • High purity and spatial quality (99.9999%)

For more information on crystal data processing, S2 Materials, or other inquiries, please contact us.