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arXiv 2102.09472cond-mat.mtrl-scicond-mat.mes-hallphysics.comp-ph
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单层hBN光腔中的声子激元

Phonoritons in a monolayer hBN optical cavity

Simone Latini, Umberto De Giovannini, Edbert J. Sie, Nuh Gedik, Hannes Hübener, Angel Rubio

摘要:

声子是一种基元激发,预计将从激子、声子和光子之间的杂化中出现。除了有趣的多粒子结构,声子是感兴趣的,因为它们可以作为功能节点的设备,利用电子,声子和光子元件的能量转换和热传输应用。虽然声子被预言在强电磁波照射下会出现在激子介质中,但它们存在的严格条件却无法在固体中直接观察到。特别是,共振,强烈的泵浦方案已被提出,但过度的光激发的载流子阻止光学检测。在这里,我们从理论上预测的外观的声子特性在单层六方氮化硼(hBN)嵌入在一个光学腔。激子-极化激元分支与声子副本的杂交证明了声子态的相干叠加性质,声子副本可由腔-物质耦合强度调节。这一发现同时提供了一个实验途径来观察预测的声子,并开辟了一个新的途径,调谐材料的性能。

英文摘要:

A phonoriton is an elementary excitation that is predicted to emerge from hybridization between exciton, phonon and photon. Besides the intriguing many-particle structure, phonoritons are of interest as they could serve as functional nodes in devices that utilize electronic, phononic and photonic elements for energy conversion and thermal transport applications. Although phonoritons are predicted to emerge in an excitonic medium under intense electromagnetic wave irradiation, the stringent condition for their existence has eluded direct observation in solids. In particular, on-resonance, intense pumping scheme has been proposed but excessive photoexcitation of carriers prevents optical detection. Here we theoretically predict the appearance of phonoritonic features in monolayer hexagonal boron nitride (hBN) embedded in an optical cavity. The coherent superposition nature of phonoriton states is evidenced by the hybridization of exciton-polariton branches with phonon replicas that is tunable by the cavity-matter coupling strength. This finding simultaneously provides an experimental pathway to observe the predicted phonoritons and opens a new avenue for tuning materials properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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