- 期刊
超解析結構近場光碟片最近的研究與發展
Recent Research and Development of Super-Resolution Near-Field Structure Optical Disk
摘要
自從1992年美國貝爾實驗室的Betzig首次在磁光式鉑鈷多層膜上，以近場光學的方式，成功達成約45 Gbits/inch^2的超高記錄密度以來，近場光學記錄技術的實用化及商業化一直是許多人追求與努力的目標。近幾年來的一些主要發展，除了各式近場光學探針讀寫的技術、固體浸入式鏡頭(Solid immersion lens, SIL)的近場光碟機之外，便是由附屬於日本先進工業科學與技術研究院(AIST)下之尖端光學技術實驗室(LAOTech)的富永淳二(J.Tominaga)博士，於1998年所發表的超解析結構（Super-resolution optical near-field structure，簡稱super-RENS）近場光碟片。此種技術可以用一般光碟機的讀寫頭，在記錄層上寫入或讀出一個小於光學繞射極限尺寸的記錄點，是光學儲存技術的一大突破。本文介紹這種超解析結構的近場光碟片的發展及應用。
並列摘要
Near-field optical recording was first proposed and demonstrated by Betzig et al. using a near-field scanning optical microscope. The most important advantage for near-field optical recording is the superior spatial resolution with no diffraction limit. To realize near-field optical recording in practice, solid immersion lens (SIL) was used to achieve higher recording speed. However, the control of the near-field distance between the SIL recording head and the recording medium, and the near-field aperture size of the SIL, are the major hurdles. Recently, Tominaga et al have successfully demonstrated that super-resolution near-field structure (super-RENS) can provide recording marks less than l00 nm on a digital versatile disk (DVD). The super-RENS is now considered a more feasible way of the near-field optical recording with simpler recording head design, less mechanic damage, and higher recording speed. In this paper, we give an introduction of the research and development of super-RENS.