Thermal emission from a metamaterial wire medium slab.
نویسندگان
چکیده
We investigate thermal emission from a metamaterial wire medium embedded in a dielectric host and highlight two different regimes for efficient emission, respectively characterized by broadband emission near the effective plasma frequency of the metamaterial, and by narrow-band resonant emission at the band-edge in the Bragg scattering regime. We discuss how to control the spectral position and relative strength of these two emission mechanisms by varying the geometrical parameters of the proposed metamaterial and its temperature.
منابع مشابه
The Fundamental Physics of Directive Beaming at Broadside and the Role of Leaky Waves
The fundamental mechanism behind directive beaming at broadside for various structures will be explored. These include Fabry-Pérot type of resonant-cavity antennas, low-permittivity metamaterial substrate antennas composed of a wire medium slab, and optical directive beaming due to plasmonic effects. In all cases it will be shown that the fundamental explanation for the directive beaming effect...
متن کاملA planar metamaterial: Polarization independent fishnet structure
We numerically and experimentally investigate a planar metamaterial that is composed of connected cut-wire pairs and continuous wires operating at 21 GHz. The characterization was performed by using the effective medium theory. The existence of negative refraction is concluded from the transmission data of four structures: cut-wire pairs, shorted cut-wire pairs, composite metamaterial, and shor...
متن کاملQ-based design equations for resonant metamaterials and experimental validation
Practical design parameters of resonant metamaterials, such as loss tangent, are derived in terms of the quality factor Q of the resonant effective medium permeability or permittivity. Through electromagnetic simulations of loopbased resonant particles, it is also shown that the Q of the effective medium response is essentially equal to the Q of an individual resonant particle. Thus, by measuri...
متن کاملA metamaterial for directive emission.
In this paper we present the first results on emission in metamaterial. We show how the specific properties of metallic composite material can modify the emission of an embedded source. We show that under proper conditions the energy radiated by a source embedded in a slab of metamaterial will be concentrated in a narrow cone in the surrounding media. An experimental demonstration of this effec...
متن کاملExcitation of backward Tamm states at an interface between a periodic photonic crystal and a left-handed metamaterial
We study the excitation of electromagnetic surface waves in a slab of a left-handed metamaterial separating a one-dimensional periodic photonic crystal and a homogeneous dielectric medium, the so-called surface Tamm states. We show that such a layered structure can exhibit a giant lateral Goos-Hänchen shift of the scattered beam accompanied by a splitting of the reflected and transmitted beams ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics express
دوره 20 9 شماره
صفحات -
تاریخ انتشار 2012