Graphene-based photonic crystal to steer giant Faraday rotation

Abstract

We present a graphene-based photonic-crystal schematic of enhancing and steering Faraday rotation angle of graphene. This concept is counter-intuitive because the giant Faraday rotation and high transmission can be simultaneously pronounced, which is distinguished from exisitng graphene structures reported before. It is found that chemical potential can be tailored to generate a controllable giant Faraday rotation via graphene with atomic thickness. By engineering the individual component thickness in the photonic crystal, the magneto-optical performance can be significantly improved. This is of fundamental importance in a wide range of magneto-optical applications, simply because the Faraday rotation makes sense only when the transmittivity is decently high. V

Tunable absorption in graphene-based hyperbolic metamaterials for mid-infrared range

“…Peculiar electronic properties have gained increasing interest from many researchers [4][5][6][7][8][9]. A single sheet of undoped graphene has single pass absorption of πα (2.3%), where α¼e 2 /(ħc) is the quantum electrodynamics fine structure constant [10,11].…”

Strong enhancement of Faraday rotation using one-dimensional conjugated photonic crystals containing graphene layers

“…Furthermore, graphene has potential applications in transformation optics and plasmonics [9][10][11]. Recently, it has been theoretically and experimentally demonstrated that graphene can be a good candidate in magneto-optics [12][13][14][15][16][17][18]. The Faraday effect is one of the famous magneto-optical effects in which the polarization plane of light propagating through either a metal or a dielectric rotates in the presence of an external magnetic field along the propagation direction.…”

“…Da and Liang have designed a photonic crystal infiltrated with graphene to obtain further enhancement in FR angle [15]. Da and Qiu also have shown that large FR angle and high transmission can be achieved simultaneously in graphene-based photonic crystals [16]. They found that the FR of graphene can be controlled with the variation of chemical potential [16].…”

“…Da and Qiu also have shown that large FR angle and high transmission can be achieved simultaneously in graphene-based photonic crystals [16]. They found that the FR of graphene can be controlled with the variation of chemical potential [16]. In addition, Da et al placed a single graphene layer at the interface of a heterogeneous photonic crystal (PC) to realize enhanced FR angle and high transmittance [17].…”

“…In addition, Da et al placed a single graphene layer at the interface of a heterogeneous photonic crystal (PC) to realize enhanced FR angle and high transmittance [17]. Because of tradeoff between FR angle and transmission, the cases of giant FR angle with low transmission are not suitable for practical applications [16]. As a result, it is of great importance to propose another graphene-based structure that provides high transmission while keeping large FR angles.…”