Device Concepts for Graphene-Based Terahertz Photonics
نویسندگان
چکیده
منابع مشابه
Terahertz wireless communications based on photonics technologies.
There has been an increasing interest in the application of terahertz (THz) waves to broadband wireless communications. In particular, use of frequencies above 275 GHz is one of the strong concerns among radio scientists and engineers, because these frequency bands have not yet been allocated at specific active services, and there is a possibility to employ extremely large bandwidths for ultra-...
متن کاملDual-band, Dynamically Tunable Plasmonic Metamaterial Absorbers Based on Graphene for Terahertz Frequencies
In this paper, a compact plasmonic metamaterial absorber for terahertz frequencies is proposed and simulated. The absorber is based on metamaterial graphene structures, and benefits from dynamically controllable properties of graphene. Through patterning graphene layers, plasmonic resonances are tailored to provide a dual band as well as an improved bandwidth absorption. Unit cell of the design...
متن کاملTunable graphene based optics, electronics and photonics
Graphene, which consists of a single atom-thick plane of carbon atoms arranged in a honeycomb lattice, exhibits unique both " bulk " and " surface " properties of materials due to its tunable electronic structure. In this talk, I would like to present the tunable platform of graphene-based materials including graphene and graphene oxide in optical, electronic and photonic applications by manipu...
متن کاملUnique prospects for graphene-based terahertz modulators
The modulation depth of two-dimensional electron-gas (2DEG) based terahertz (THz) modulators using AlGaAs/GaAs hetero-structures with metal gates is inherently limited to <30%. The metal gate not only attenuates the THz signal but also severely degrades modulation depth. Metal losses can be significantly reduced employing an alternative material with tunable conductivity. Graphene presents a un...
متن کاملGraphene terahertz injection lasers: Concepts and feasibility of realization
The gapless energy spectrum of electrons and holes in single graphene layers (SGLs), graphene bilayers (GBLs), and non-Bernal stacked multiple graphene layers (MGLs) opens up prospects of creating graphene-based terahertz (THz) and infrared (IR) lasers. The interband population inversion in such lasers can be achieved, for instance, by optical pumping [1]. However, the excess energy received by...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Journal of Selected Topics in Quantum Electronics
سال: 2014
ISSN: 1077-260X,1558-4542
DOI: 10.1109/jstqe.2013.2271692