Physical study concerning the characteristics of single and double photon emission from bilayer graphene

Abstract

This research is a study of the photon radiation from the bilayer graphene perturbed by the electromagnetic field. Theoretically, our simulation shows vividly the asymmetry property of such bilayer graphene resulting in the outstanding attribute of the photon emission profiles. The methods employed in our work are a tight-binding model in the many-body system and Fermi’s golden rule. In this work, we show the emission profiles in various kinds such as the single-photon emission (both in linear polarization and circular polarization) and the double photon emission. Additionally, in the case of double photon emission, we illustrate the degree of entanglement between photon pairs by analyzing the certain coincident rate involved indirectly in the emission profiles. The results demonstrate that the degree of entanglement is maximum when the photon pair’s direction is perpendicular to each other (especially, in the case that one of the photons emits in the direction being perpendicular to the bilayer graphene plane). We also discover that the direction of the maximum entangled photons depends on the polarization between the photon’s pairs.

High-harmonic generation (HHG) in silicene

“…Thus, there is no aggregation in our consideration. Concerning spin dynamics induced by a rather large intrinsic spinorbit coupling [2][3][4][5][6][7][8], they render as graphene-like materials topological insulators. Concerning their buckling structure, there is a layer separation between the two sublattices that makes the gap adjustable by applying a perpendicular electric field.…”

“…Concerning their buckling structure, there is a layer separation between the two sublattices that makes the gap adjustable by applying a perpendicular electric field. As a result, the Hamiltonian for graphene-like materials has the following shape [2][3][4][5][6][7][8] that different graphene-like structures have different parameter values.…”

“…The novel two-dimensional material (such as graphene) and carbon nanotube have considerably attracted scientists both in theoretical and experimental recently [1][2][3][4][5][6], due to its exotic electronic structure and effective applications in nanoelectronics as well as electrical and optical properties. Silicene, silicon's equivalent of graphene, is usually created by epitaxial growth with featured a slightly bowed honeycomb structure [7], making one of the most promising option for optoelectronic applications.…”

Theoretical Analysis of High-Harmonic Generation in Silicon Nanotubes

“…Significantly, the work [4] portrays that the tight-binding theory is a useful framework to investigate the electronic properties of silicene. Similar to graphene [5,6] which can be synthesized to be nanotubes with different chiral types [8,9], so also silicene [6]. Zigzag silicon hexagonal nanotube (Si h-NT) [10,11] is the chiral type that the research [12] studied theoretically through the tight-binding method.…”