Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities
Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities
复制标题
通过ε-近零纳米腔实现超强等离子体-声子耦合
DOI:
10.1038/s41566-020-00731-5
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发表时间:
2021
期刊:
影响因子:
35
通讯作者:
Oh, Sang-Hyun
中科院分区:
文献类型:
--
作者:
Yoo, Daehan;de León-Pérez, Fernando;Pelton, Matthew;Lee, In-Ho;Mohr, Daniel A.;Raschke, Markus B.;Caldwell, Joshua D.;Martín-Moreno, Luis;Oh, Sang-Hyun
Vibrational ultrastrong coupling, where the light–matter coupling strength is comparable to the vibrational frequency of molecules, presents new opportunities to probe the interactions between molecules and zero-point fluctuations, harness cavity-modified chemical reactions and develop novel devices in the mid-infrared spectral range. Here we use epsilon-near-zero nanocavities filled with a model polar medium (SiO2) to demonstrate ultrastrong coupling between phonons and gap plasmons. We present classical and quantum-mechanical models to quantitatively describe the observed plasmon–phonon ultrastrong coupling phenomena and demonstrate a modal splitting of up to 50% of the resonant frequency (normalized coupling strengthη> 0.25). Our wafer-scale nanocavity platform will enable a broad range of vibrational transitions to be harnessed for ultrastrong coupling applications.
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