Theory on coherent perfect absorber and laser via a metamaterial slab with complex parameters

IF 1.8 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

EPL Pub Date : 2023-12-05 DOI:10.1209/0295-5075/ad12a2

Zhouzhou Sun, Weixin Lu, Ping Bai

引用次数: 0

Abstract We explicitly derive the general conditions of a metamaterial slab to achieve coherent perfect absorber (CPA) and laser under the excitation of two counter-propagating incident waves. Our results provide a unified theory that could be applied in designing homogenous metamaterial with complex parameters for realizing CPAs and lasers. Especially, the theory discusses two special cases, i.e., case 1) a metamaterial slab with complex permittivity and real permeability, or complex permeability and real permittivity, and case 2) a metamaterial slab with both complex permittivity and permeability, which encompass the entire range of metamaterials with complex parameters. For both cases, our theory accurately derives the required parameters of the metamaterial for CPA, laser and their coexistence, as validated by numerical simulations. Our work serves as a guide for designing CPAs and lasers via general metamaterial slabs of complex parameters.

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通过具有复杂参数的超材料板的相干完美吸收器和激光理论

摘要我们明确推导了超材料板在两个反向传播入射波激励下实现相干完美吸收器（CPA）和激光的一般条件。我们的结果提供了一个统一的理论，可用于设计具有复杂参数的同质超材料，以实现 CPA 和激光。该理论特别讨论了两种特殊情况，即情况 1：具有复介导率和实透磁率或复透磁率和实介导率的超材料板；情况 2：具有复介导率和实透磁率的超材料板。对于这两种情况，我们的理论都准确地推导出了 CPA、激光和它们共存所需的超材料参数，并通过数值模拟进行了验证。我们的工作为通过复杂参数的一般超材料板设计 CPA 和激光器提供了指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

EPL 物理-物理：综合

CiteScore

3.30

自引率

5.60%

发文量

332

审稿时长

1.9 months

期刊介绍： General physics – physics of elementary particles and fields – nuclear physics – atomic, molecular and optical physics – classical areas of phenomenology – physics of gases, plasmas and electrical discharges – condensed matter – cross-disciplinary physics and related areas of science and technology. Letters submitted to EPL should contain new results, ideas, concepts, experimental methods, theoretical treatments, including those with application potential and be of broad interest and importance to one or several sections of the physics community. The presentation should satisfy the specialist, yet remain understandable to the researchers in other fields through a suitable, clearly written introduction and conclusion (if appropriate). EPL also publishes Comments on Letters previously published in the Journal.