Single-molecule optomechanics in "picocavities"
Single-molecule optomechanics in "picocavities"
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DOI：
10.1126/science.aah5243
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发表时间：
2016-11-11
期刊：
影响因子：
56.9
通讯作者：
Baumberg, Jeremy J.
中科院分区：
文献类型：
--
作者：
Benz, Felix;Schmidt, Mikolaj K.;Baumberg, Jeremy J.
用贵金属纳米结构捕获光克服了衍射极限，并且可以将光限制在通常约30立方纳米的体积内。我们发现，等离子体纳米组件的差距内的单个原子特征可以将光定位到远低于1立方纳米的体积（“皮腔”），从而实现原子尺度上的光学实验。这些原子特征通过激光照射动态地形成和分解。虽然在室温下不稳定，但微微腔可以在低温下稳定，允许单个原子腔被探测许多分钟。与传统的光机械谐振器不同，这种极端的光学限制产生了10（6）倍的皮腔场和单个分子键振动之间的光机械耦合增强。这项工作为在单分子水平上发展纳米非线性量子光学奠定了基础。
Trapping light with noble metal nanostructures overcomes the diffraction limit and can confine light to volumes typically on the order of 30 cubic nanometers. We found that individual atomic features inside the gap of a plasmonic nanoassembly can localize light to volumes well below 1 cubic nanometer ("picocavities"), enabling optical experiments on the atomic scale. These atomic features are dynamically formed and disassembled by laser irradiation. Although unstable at room temperature, picocavities can be stabilized at cryogenic temperatures, allowing single atomic cavities to be probed for many minutes. Unlike traditional optomechanical resonators, such extreme optical confinement yields a factor of 10(6) enhancement of optomechanical coupling between the picocavity field and vibrations of individualmolecular bonds. This work sets the basis for developing nanoscale nonlinear quantum optics on the single-molecule level.