利用準分子雷射結合奈米中空粒子開發高密度光學資料儲存系統

Deep-UV Excimer-Laser-Induced Photomodification of Hollow Metal Nanoparticles for High-Density Data Storage Systems

萬德輝(De-Hui Wan) ； 陳學禮(Hsuen-Li Chen) ； 曾紹欽(Shao-Chin Tseng)

《科儀新知》 175期 (2010/04) Pp. 39-47

https://doi.org/10.29662/IT.201004.0005

摘要

在本文中，筆者開發了一種新型的光學資料儲存方法：利用準分子雷射誘發奈米中空金屬粒子陣列的光熱效應。由於氟化氪雷射的波段位於深紫外光區，可以大幅提升光學儲存的記錄密度。筆者所製備的奈米中空粒子具有兩個明顯的吸收帶，分別位於紅外光區的表面電漿共振吸收峰及深紫外光區的金屬本質吸收區。利用單一脈衝的雷射光，可以加熱奈米中空粒子，並使其結構從中空粒子轉變成實心粒子，此結構的轉變則伴隨著表面電漿共振吸收峰的藍移。利用這個技術，筆者結合相位光罩呈現了次微米維度的記錄能力及利用穿透式藍光雷射顯微鏡作為讀取工具。

並列摘要

In this paper, we report a new optical data storage method: photomodification of hollow gold nanoparticle (HGN) monolayers induced by one-shot deep-ultraviolet (DUV) KrF laser recording. The short wavelength of the recording DUV laser improved the optical resolution dramatically. We prepared HGNs exhibiting two absorbance regions: a surface plasmon resonance (SPR) peak in the near-infrared (NIR) region and an intrinsic material extinction in the DUV region. A single pulse from a KrF laser heated the HGNs and transformed them from hollow structures to smaller solid spheres. This change in morphology for the HGNs was accompanied by a significant blue shift of the SPR peak. Employing this approach, we demonstrated its patterning ability with a resolving power of a half-micrometer (using a phase mask) and developed a readout method (using a blue-ray laser microscope).