Qiying Chen

A novel formation method of thin polymer film with densely dispersed organic dye by using vacuum technique

Abstract A novel method of thin film formation of organic materials using a vacuum technique is proposed. An organic dye with a high sublimation pressure is loaded in a crucible along with a thin polymer film. After pumping down, the crucible is sealed, then placed in a constant temperature oven. The vapor of dye dissolves into the polymer film, thus forming a thin dye-containing layer.

Superresolution optical disk with a thermoreversible organic thin film

Recording and retrieving small marks far beyond the optical diffraction limit in a high-speed rotating phase-change optical disk have been investigated by use of a thermoreversible organic thin film as a superresolution mask layer. The organic thin film exhibited significant thermoreversibility and rapid response on laser irradiation. Recorded marks as small as 120 nm in length could be detected by a dynamic disk tester with a laser wavelength of 635 nm and a numerical aperture of 0.6.

Optical and time evolution properties of a photochromic thin film

Optical properties of a photochromic dye, cis-1,2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl) ethene, have been investigated. Reversible photochromic process of the dye in solution has been studied, as well as its time evolution properties. Clear photochromism has also been found for the thin films of the dye and the growth process of the thin films has been observed by atomic force microscopy.

High-density optical data storage using scattering-mode superresolution near-field structure

Scattering-mode super-resolution structure (Super-RENS) is an alternative to realize high-density optical data storage. Ag doped GeSbTe films were investigated to optimize the high- density optical data storage characteristics. It was found that the readout durability could be greatly improved by Ag doped GeSbTe films.

Optical Properties and Application of Photochromic Diarylethene

Abstract The optical properties of cis-1,2-dicyano- 1,2-bis(2,4,5-trimethyl-3-thienyl) ethene as a photochromic dye is studied. Vacuum evaporation has been used to prepare thin films for possible practical applications, especially optical information storage.

Thermochromic thin film and its application in optical data storage

Organic material with pronounced thermochromism is used as a mask layer in a phase change optical disk. The thermochromic material exhibits significant change in optical properties at increased temperatures as well as fast response upon pulsed laser irradiation. Recording and retrieving signals from marks smaller than that of the diffraction limit is investigated under high speed disk rotation.