Two-Photon 3D Optical Data Storage via Fluorescence Modulation of an Efficient Fluorene Dye by a Photochromic Diarylethene

摘要

3D optical data storage based on two-photon processes provides a mechanism for writing and reading data with less crosstalk between multiple memory layers, due to the quadratic dependence of two-photon absorption (2PA) on the incident-light intensity. This capacity for highly confined excitation and intrinsic 3D resolution affords immense information storage capacity (up to 1012 bits cm~-3). Recently, the use of photochromic materials for 3D memory has received intensive interest because of several major advantages over current optical systems, including their erasable/rewritable capability, high resolution, and high sensitivity.