Two-photon absorbing materials with quenched emission
This invention describes a method of making materials to dramatically increase storage capacities of optical storage (holographic) devices to levels proportional to higher orders of the intensity. Non-linear optical materials that exhibit 2-photon ab sorption, a known phenomenon proportional to the square of the intensity of light and absorption cross-section (a trait) of the material, are employed. Resultant emissions are quenched to heat. The heat is retained (stored) in a specific location of the material. The product combines 1,10 phenanthroline derivatives (stable, structurally rigid, crystalline and ideal for repetitive assemblies), a metal attachment (to quench the light to heat) and organic chains based on conjugated chromophores (t o lend non-linear optical characteristics of absorption). Other unique values of the invention are:
Different combinations (by changing the component compounds and the metal) have been synthesized to lend breadth of application.
Precursor ials are widely used, inexpensive, luminescent and chemically and thermally stable.
Absorption and quenching phenomena are controllable to suit different uses. Applications stem from the need for optical data storage, communication and mani ion and are in photodynamic therapy, 3D fluorescence imaging/microscopy, optical power limiting, pulse shaping and stabilization, biosensing/bioimaging, fiber optics, MEMS and nanofabrication, up-conversion lasing, electronic/opto-electronic instrume ntation and optical computers.
Categories: Materials & Chemicals, Optics Patents Issues: 7,449,578
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