Data Storage in a Nanocrystalline Mixture Using Room Temperature Frequency-Selective and Multilevel Spectral Hole-Burning,ACS Photonics

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Data Storage in a Nanocrystalline Mixture Using Room Temperature Frequency-Selective and Multilevel Spectral Hole-Burning
ACS Photonics ( IF 6.5 ) Pub Date : 2021-10-03 , DOI: 10.1021/acsphotonics.1c01115
Nicolas Riesen _{1,

2} , Kate Badek ₃ , Hans Riesen ₃

Affiliation

Persistent spectral hole-burning is shown to be suitable for multiple bit per point optical data storage at room temperature. In a novel approach employing bespoke tailoring of the effective inhomogeneous line width and line shape, by using a physical mixture of chemically different matlockite nanocrystals, a relatively broad fluorescence emission line with a top-hat distribution can be realized at the diffraction limit and at room temperature. This top-hat profile enables multiple spectral holes to be burnt, all having the same baseline. We demonstrate this with two spectral holes burnt in a diffraction limited spot, with the prospects for multihole-depth or multilevel encoding to increase the number of bits stored per spectral hole. Using thermoelectrically cooled temperatures down to 175 K, a larger number of holes is also demonstrated. The technique presented is predicted to allow for optical data densities approaching terabits/cm² by exploiting the unique properties of these inorganic phosphors.

中文翻译：

使用室温频率选择和多级光谱烧孔在纳米晶混合物中存储数据

持久的光谱烧孔显示适用于室温下每点多位光学数据存储。在采用定制定制有效非均匀线宽和线形的新方法中，通过使用化学性质不同的长发白云石纳米晶体的物理混合物，可以在衍射极限和室温下实现具有顶帽分布的相对较宽的荧光发射线温度。这种礼帽轮廓可以燃烧多个光谱孔，所有光谱孔都具有相同的基线。我们通过在衍射受限点上烧毁的两个光谱孔来证明这一点，并具有使用多孔深度或多级编码来增加每个光谱孔存储的位数的前景。使用低至 175 K 的热电冷却温度，还展示了更多的孔。²通过利用这些无机磷光体的独特性质。

更新日期：2021-10-20

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