基本介紹
- 中文名:5D光數據存儲
- 外文名:5D optical data storage
- 用途:永久存儲數據
設計,套用,
設計
這個概念是在非光敏的透明材料(如熔融石英)中批量光學存儲數據,它以其高化學穩定性和抗性而聞名。1996年首次提出並演示了將數據使用飛秒雷射寫入其中。該存儲介質由熔融石英組成,其空間尺寸、強度、偏振和波長被用來調製數據。通過引入嵌入材料中的膠體金或納米銀粒子,它們的等離體子特性可以被利用。
使用最佳化參數測試了多達18層,光脈衝能量為0.2微焦(5.6×10 kWh),持續時間為600飛秒,重複率為500 kHz。假設有一個百分百高效的雷射器,對於最大0.5Mbits的數據存儲來說,這就是一瓦時(3.6 kJ)的能量消耗。對於1000 Mbits的存儲,加起來就是兩千瓦時(7.2 MJ)。使用加速老化測量法測試耐久性表明,在室溫30℃(86°F)下,納米光柵的衰減時間為3×10年。在189°C(372°F)的高溫下,推斷出的衰減時間與宇宙年齡(13.8×10年)相當。通過用1.4 NA的數值孔徑物鏡和250-350納米的波長記錄數據,容量可以達到360 TB。
"The 5-dimensional discs [have] tiny patterns printed on 3 layers within the discs. Depending on the angle they are viewed from, these patterns can look completely different. This may sound like science fiction, but it's basically a really fancy optical illusion. In this case, the 5 dimensions inside of the discs are the size and orientation in relation to the 3-dimensional position of the nanostructures. The concept of being 5-dimensional means that one disc has several different images depending on the angle that one views it from, and the magnification of the microscope used to view it. Basically, each disc has multiple layers of micro and macro level images."