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arXiv 1608.05073physics.optics
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通过石墨烯/电介质结构在光的近乎完美的反射、吸收和透射之间进行动态调谐

Dynamical tuning between nearly perfect reflection, absorption, and transmission of light via graphene/dielectric structures

Jacob Linder, Klaus Halterman

摘要:

实现对电磁波的反射$(R)$、吸收$(A)$和透射$(T)$的明确控制是量子光学中的关键目标。为此,通常利用由具有不同光学特性的元件组成的混合结构,以便实现诸如对于入射光的高$R$或高$A$的特征。一个理想的目标是能够在同一器件内在几乎完美的反射、吸收和透射的所有三种状态之间进行调谐,从而在情况$R\to 1$、$A\to1$和$T\to1$之间动态地交换。我们在这里表明,在每一侧与石墨烯层接合的电介质允许精确地实现这一点:通过仅调整石墨烯的费米能级,可以在THz区域及以下达到所有三个区域。此外,我们表明,在系统中的圆柱形缺陷的列入提供了不同类型的控制的电磁波的散射的石墨烯层的装置。

英文摘要:

Exerting well-defined control over the reflection $(R)$, absorption $(A)$, and transmission $(T)$ of electromagnetic waves is a key objective in quantum optics. To this end, one often utilizes hybrid structures comprised of elements with different optical properties in order to achieve features such as high $R$ or high $A$ for incident light. A desirable goal would be the possibility to tune between all three regimes of nearly perfect reflection, absorption, and transmission within the same device, thus swapping between the cases $R\to 1$, $A\to1$, and $T\to1$ dynamically. We here show that a dielectric interfaced with a graphene layer on each side allows for precisely this: by tuning only the Fermi level of graphene, all three regimes can be reached in the THz regime and below. Moreover, we show that the inclusion of cylindrical defects in the system offers a different type of control of the scattering of electromagnetic waves by means of the graphene layers.

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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