A major driver for the development of holographic photopolymers was the concept of optically in a 3D volume. ÌýThe traditional approach to this problem was to spatially modulate a laser beam with an image of ~one million bits, record a hologram of this image, then use Bragg selectivity to record subsequent images at the same location to achive storage densities as as several Tbit/square inch.ÌýStarting while at a Silicon Valley startup, Siros Technologies, we explored an alternative approach extnending current optical disk technologies. ÌýHere, a spinning disk is written and read by a focused beam and data is represented by isolated "micro-holograms." These are tiny (several microns cubed) volumes of Bragg retroreflectors written by the interference of the write laser focus and a retroreflected copy. ÌýThe disk, which is moving at tens of meters per second, records these nanosecond exposures as bright retroreflecting bits.Ìý
The team
- Sarah Walter
- Much of this work was performed at Siros Technologies, a startup founded by
Learn more
- R. R. McLeod,Ìý, JOSA B 26, 308-317, 2009.
- R. R. McLeod, A. J. Daiber, M. E. McDonald, T. L. Robertson, T. Slagle, S. L. Sochava, and L. Hesselink,Ìý, Applied Optics 44, 3197-3207, 2005.
- R. R. McLeod, A. J. Daiber, T. Honda, M. E. McDonald, T. L. Robertson, T. Slagle, S. L. Sochava, and L. Hesselink,Ìý, Applied Optics 47, 2696-2707, 2008.
- Sarah K. Walter, Master of Science in Electrical Engineering,Ìý, ÀÖ²¥´«Ã½, 2005.