太赫兹区域法布里-佩罗特微腔包含矩形孔磁超材料中的三耦合法向模式分裂

IF 2.5 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Haruki Anzai , Shota Inoue , Yu Tokizane , Hiroko Yoshida , Takeshi Yasui , Fusao Shimokawa , Noriaki Tsurumachi
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引用次数: 0

摘要

长期以来,人们一直在深入研究微腔内光与物质之间的相互作用,但大多数研究都集中在材料的电偶极子与腔内电场之间的耦合上。我们用超材料取代了材料,重点研究了超材料的磁响应特性,并研究了它与法布里-佩罗特(FP)微腔内磁场的相互作用。在这项研究中,我们利用了被称为磁流天线的矩形孔超材料(RH)表现为磁偶极子这一事实。这种矩形孔超材料还具有高反射率,因此还能起到镜子的作用。利用这一特性,我们研究了包含 RH 超材料的三种不同 FP 腔结构在太赫兹区域的光学特性。首先,我们通过传输线理论分析研究了其传输特性和色散关系。接下来,为了制作实际样品,我们使用有限差分时域(FDTD)方法设计了样品,并研究了样品内部的磁场分布。然后,我们通过光刻和掀离工艺制作了样品,并使用太赫兹时域光谱法测量了其透射光谱。结果我们发现,由于磁场和磁偶极子之间的强耦合,可以观察到三耦合法向模式分裂。这种现象不会出现在由两个耦合振子组成的强耦合系统中,例如由普通电场和电偶极子组成的著名空腔极化子。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Triple-coupled normal mode splitting in Fabry-Pérot microcavity contained rectangular hole magnetic metamaterials in THz region
The interaction between light and matter inside a microcavity has been intensively studied for a long time, but most of the research has focused on the coupling between the electric dipole of the material and the electric field inside the cavity. We replaced the material with a metamaterial, focused on its characteristic magnetic response, and studied its interaction with the magnetic field inside a Fabry-Pérot (FP) microcavity. In this study, we utilized the fact that a rectangular hole metamaterial (RH), known as a magnetic current antenna, behaves as a magnetic dipole. This RH also has a high reflectance, so it also functions as a mirror. Taking advantage of this property, we investigated the optical properties of three different FP cavity structures containing RH metamaterials in the THz region. First, we investigated the transmission properties and dispersion relationship by transmission line theory analysis. Next, to fabricate the actual sample, we designed it using the finite differential time domain (FDTD) method and investigated the magnetic field distribution inside the sample. We then fabricated a sample by photolithography and lift-off processes and measured its transmission spectra using THz time-domain spectroscopy. As a result, we found that it was possible to observe triple-coupled normal mode splitting caused by the strong coupling between the magnetic field and the magnetic dipole. This phenomenon does not appear in a strongly coupled system of two coupled oscillators, such as the well-known cavity polariton, which consists of an ordinary electric field and an electric dipole.
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来源期刊
CiteScore
5.00
自引率
3.70%
发文量
77
审稿时长
62 days
期刊介绍: This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.
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