Polarization-Independent Plasmon-Induced Transparency in a Symmetric Metamaterial

Mun, Sang‐Eun; Lee, Kyookeun; Yun, Hansik; Lee, Byoungho

doi:10.1109/lpt.2016.2605740

Cited by 20 publications

(22 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11,12 This physical insight leads to the realization of the EIT analogues in a series of classical optical systems, such as coupled microresonators, [13][14][15] photonic crystal waveguides, 16,17 a waveguide side-coupled to resonators 18,19 and metamaterials [20][21][22] , which are robust and free from the scathing experimental requirements of quantum optics. In particular, the metamaterial analogues of EIT through the near field coupling between the bright and dark mode resonators, have enabled the realization of this phenomenon at frequencies in radiofrequency (RF), [23][24][25][26] terahertz (THz), [27][28][29][30][31][32] near-infrared [33][34][35][36] and visible regimes [38][39][40] through defining a correspondingly tailored geometry for the unit cell. Due to the subwavelength thickness, these EIT analogues with the accompanying slow light and enhanced nonlinear effects have shown great prospects in designing very compact devices, such as optical filters, 41,42 optical buffers 43,44 and ultrasensitive biosensors.…”

Section: Introductionmentioning

confidence: 99%

Active modulation of electromagnetically induced transparency analogue in terahertz hybrid metal-graphene metamaterials

Xiao¹,

Wang²,

Liu³

et al. 2018

Carbon

409

161

View full text Add to dashboard Cite

Metamaterial analogues of electromagnetically induced transparency (EIT) have been intensively studied and widely employed for slow light and enhanced nonlinear effects. In particular, the active modulation of the EIT analogue and well-controlled group delay in metamaterials have shown great prospects in optical communication networks. Previous studies have focused on the optical control of the EIT analogue by integrating the photoactive materials into the unit cell, however, the response time is limited by the recovery time of the excited carriers in these bulk materials. Graphene has recently emerged as an exceptional optoelectronic material. It shows an ultrafast relaxation time on the order of picosecond and its conductivity can be tuned via manipulating the Fermi energy. Here we integrate a monolayer graphene into metal-based terahertz (THz) metamaterials, and realize a complete modulation in the resonance strength of the EIT analogue at the accessible Fermi energy. The physical mechanism lies in the active tuning the damping rate of the dark mode resonator through the recombination effect of the conductive graphene. Note that the monolayer morphology in our work is easier to fabricate and manipulate than isolated fashion. This work presents a novel modulation strategy of the EIT analogue in the hybrid metamaterials, and pave the way towards designing very compact slow light devices to meet future demand of ultrafast optical signal processing.

show abstract

Section: Introductionmentioning

confidence: 99%

Active modulation of electromagnetically induced transparency analogue in terahertz hybrid metal-graphene metamaterials

Xiao¹,

Wang²,

Liu³

et al. 2018

Carbon

409

161

View full text Add to dashboard Cite

show abstract

“…This is because an arbitrarily polarized wave can be considered as a vector superposition of x-polarized and y-polarized waves. 16 In previously reported studies, the symmetry of a structure is usually based on multiple rotations of the substructure such as four-fold and eight-fold rotational symmetry structures, 3,15,16,21,[36][37][38][39][40] whereas the symmetry of our structure originates from the structure itself. Owing to the symmetry of our structure, it is predicted that its transmission response is polarization-independent.…”

Section: 33-35mentioning

confidence: 99%

“…7,11,12 Moreover, compared with the EIT property in atomic systems, the EIT effect in metamaterials has the advantages of bandwidth broadening, room temperature operation, nanoscale planar devices, and the ability to integrate with nanoplasmonic circuits, which allow the use of the EIT effect in practical applications. [13][14][15] Generally, the EIT effect in metamaterials is realized based on two methods: one is the bright-dark model, and the other is the superradiant-subradiant model. 13,16 The latter is usually characterized by two substructures with similar resonant frequencies but signicantly different quality factors (Qfactors).…”

Section: Introductionmentioning

confidence: 99%

“…As a result, EIT effects in metamaterials highly depend on the polarization states of incident electromagnetic (EM) waves, 3 that is, they are merely effective for one linear polarization state. 15 When the polarization of incident wave changes, the EIT effect attenuates or even disappears. 16 However, in practical applications, it is highly desired that the EIT effect in metamaterials should be insensitive to the polarization states of the incident EM waves.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polarization-independent and angle-insensitive electromagnetically induced transparent (EIT) metamaterial based on bi-air-hole dielectric resonators

et al. 2018

View full text Add to dashboard Cite

We numerically demonstrate that an electromagnetically induced transparent (EIT) all-dielectric metamaterial with properties of polarization-independence and incident angle insensitivity can be achieved in terahertz regimes. The metamaterial cell is composed of two bi-air-hole cubes (BCs) with different sizes. The two BCs function as superradiant and subradiant resonators, respectively. Based on Mie-type destructive interferences between dielectric resonators, the EIT effect is induced at around 8.25 THz with the transmission peak close to 0.95. Moreover, the "two-particle" model is introduced to describe the EIT effect and the influence of couplings between the two BCs on the transmission spectra.Analytical results are in good agreement with numerical simulation results. Owing to the symmetry and uniformity of the metamaterial structure, polarization-independent and angle-insensitive properties can be achieved. In addition, the slow light characteristic of the metamaterial is also verified. Such an EIT scheme may have potential applications in low-loss slow light devices and bandpass filters.

show abstract

“…Recently, metasurfaces have been intensively investigated and used as substitutions for bulky optical elements in the miniaturization of the optical system. A Metasurface, a flat optical device with sub-wavelength thickness, is composed of periodically arranged nanoantennas to modulate the optical characteristics of an input light signal, such as spectrum, polarization, and wavefront [6][7][8][9] . Incorporating optically active ingredients in a metasurface is required for the application of an active optical system.…”

mentioning

confidence: 99%

Deflection angle switching with a metasurface based on phase-change nanorods [Invited]

et al. 2018

View full text Add to dashboard Cite

We propose the active metasurface using phase-change material Ge 2 Sb 2 Te 5 (GST), which has two distinct phases so called amorphous and crystalline phases, for an ultrathin light path switching device. By arranging multiple anisotropic GST nanorods, the gradient metasurface, which has opposite directions of phase gradients at the two distinct phases of GST, is demonstrated theoretically and numerically. As a result, in the case of normal incidence of circularly polarized light at the wavelength of 1650 nm, the cross-polarized light deflects to −55.6°at the amorphous phase and þ55.6°at the crystalline phase with the signal-to-noise ratio above 10 dB.

show abstract

Polarization-Independent Plasmon-Induced Transparency in a Symmetric Metamaterial

Cited by 20 publications

References 21 publications

Active modulation of electromagnetically induced transparency analogue in terahertz hybrid metal-graphene metamaterials

Active modulation of electromagnetically induced transparency analogue in terahertz hybrid metal-graphene metamaterials

Polarization-independent and angle-insensitive electromagnetically induced transparent (EIT) metamaterial based on bi-air-hole dielectric resonators

Deflection angle switching with a metasurface based on phase-change nanorods [Invited]

Contact Info

Product

Resources

About