.png){kind=icon}
返回
Perfect Absorption by an Atomically Thin Crystal
.png){kind=icon}
OA
AI
DOI：10.1103/PhysRevApplied.14.024009.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Optical absorption is one of the most fundamental processes in light-matter interactions. The ability to achieve and control high absorption is crucial for a broad range of modern photonic technologies. In nanomaterials of length scales much smaller than a wavelength, optical absorption is typically a weak perturbation. To achieve high absorption, exquisite techniques and structures have been developed, such as coherent interference of multiple laser beams and plasmonic metasurfaces. Here, we show that a robust critical-coupling condition exists to allow perfect absorption of light by a subnanometer-thick two-dimensional semiconductor, when the radiative-decay rate of the exciton resonance balances with its loss rate. We measure an absorption up to 99.6% in a monomolecular MoSe2 crystal placed in front of a flat mirror. We furthermore demonstrate control of the perfect absorption by tuning the exciton-phonon, exciton-exciton, and exciton-photon interactions with temperature, pulsed laser excitation, and a movable mirror, respectively. Our work suggests a mechanism to achieve and control critical coupling in two-dimensional excitonic systems, enabling photonic applications including ultrafast low-power light modulators and sensitive optical sensing.
Keyword:
COHERENT ABSORPTION
OPTICAL-ABSORPTION
QUANTUM
EXCITONS
GRAPHENE
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
4.4
论文数:
7.1K
被引数:
2.8W
机构
引用论文
Valley-Selective Exciton Bistability in a Suspended Monolayer Semiconductor悬浮单层半导体中的谷选择性激子双稳态.png)
NANO LETTERSOAAI
NANO LETTERSIF9.1
OAAI分享收藏分享收藏Infrared Perfect Absorber and Its Application As Plasmonic Sensor红外完美吸收体及其作为等离子体传感器的应用NANO LETTERS
NANO LETTERSIF9.1
PREAI
分享收藏Coherent perfect absorption and asymmetric interferometric light-light control in graphene with resonant dielectric nanostructuresOPTICS EXPRESS
OAAI
OPTICS EXPRESSIF3.3
OAAI分享收藏分享收藏
查看更多内容