Amorphous Silicon with Extremely Low Absorption: Beating Thermal Noise in Gravitational Astronomy.
Amorphous Silicon with Extremely Low Absorption: Beating Thermal Noise in Gravitational Astronomy.
复制标题
吸收率极低的非晶硅:克服引力天文学中的热噪声。
DOI:
10.1103/physrevlett.121.191101
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发表时间:
2018
影响因子:
8.6
通讯作者:
Birney R
中科院分区:
文献类型:
--
作者:
Birney R
Amorphous silicon has ideal properties for many applications in fundamental research and industry. However, the optical absorption is often unacceptably high, particularly for gravitational-wave detection. We report a novel ion-beam deposition method for fabricating amorphous silicon with unprecedentedly low unpaired electron-spin density and optical absorption, the spin limit on absorption being surpassed for the first time. At low unpaired electron density, the absorption is no longer correlated with electron spins, but with the electronic mobility gap. Compared to standard ion-beam deposition, the absorption at 1550 nm is lower by a factor of. This breakthrough shows that amorphous silicon could be exploited as an extreme performance optical coating in near-infrared applications, and it represents an important proof of concept for future gravitational-wave detectors.
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Xiao Liu;B. White;R. Pohl;E. Iwanizcko;Kim M. Jones;A. Mahan;B. N. Nelson;R. Crandall;S. Vepřek
通讯作者:
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