Publications (66)
Electronic band gaps and transport properties in periodically alternating mono- and bi-layer graphene superlattices
Xiong Fan, Wenjun Huang, Tianxing Ma +2
We investigate the electronic band structure and transport properties of periodically alternating mono- and bi-layer graphene superlattices (MBLG SLs). In such MBLG SLs, there exis…
Is it possible for a superluminal signal velocity without violating causality?
Li-Gang Wang
We present a model for a vacuum-like effective medium composed of the absorbing and gain media under the special designed parameters. Within the linear response theory, we prove th…
Ray engineering from chaos to order in two-dimensional optical cavities
Chenni Xu, Li-Gang Wang, Patrick Sebbah
Chaos, namely exponential sensitivity to initial conditions, is generally considered a nuisance, inasmuch as it prevents long-term predictions in physical systems. Here, we present…
Optical echoes of light near a black hole
Suting Ju, Jingxuan Zhang, Li-Gang Wang
The light deflection under a strong gravitational field, referred to as strong gravitational lensing, provides a powerful probe of spacetime geometry. Besides, laboratory analogue…
On vortex strength and beam propagation factor of fractional vortex beams
Jisen Wen, Li-Gang Wang, Xihua Yang +2
Fractional vortex beams (FVBs) with non-integer topological charges attract much attention due to unique features of propagations, but there still exist different viewpoints on the…
Control of Goos-Hanchen shift of a light beam via a coherent driving field
Li-Gang Wang, Manzoor Ikram, M. Suhail Zubairy
We present a proposal to manipulate the Goos-Hanchen shift of a light beam via a coherent control field, which is injected into a cavity configuration containing the two-level atom…