Polariton condensate and Landau-Zener-Stückelberg interferometry transition in multilayer transition metal dichalcogenides

Abstract

This paper gives a detailed description of a high-performance polariton condensate for a quantum mechanical two-level system (TLS). We propose a transition metal dichalcogenides (TMDs) setup and theoretically carry out the spectroscopy of these polariton condensates. Through theoretical and numerical analysis, we obtain many features in two dimensional (2D) multilayer TMDs. We compute the energy of the system and the Landau-Zener-Stückelberg (LZS) quantum tunneling probability under the effect of a sequence of laser light. At certain critical 2D TMDs parameters, the system exhibits a multi-crossing scenario in a privileged position of 2D multilayer TMDs. We predict the consecutive modulations and highlight the conservation of the LZS interference patterns mapped from the 2D TMDs system. At weak coupling regime, a successful conversion of interferometry signals is identified for some values of laser frequency. We explain such a result as a valley sensitive cavity rate model due to coherent exchange and incoherent scattering, meaning that polariton condensate is formed in the valley around the Brillouin zone. The latter is used quantitatively and qualitatively to achieve high-precision measurements beyond that of its elementary constituents. The obtained results confirm that MoSe2 has the highest sensitivity to radiation field as compared to other 2D multilayer TMDs materials. Therefore, MoSe2 stands as an appropriate candidate among other 2D TMDs to form polariton condensates.

Topological Landau–Zener nanophotonic circuits

“…The Landau–Zener (LZ) model, initially established to study the dynamics in a two-level quantum system, 28 , 29 can be employed to predict the probability of nonadiabatic tunneling between two energy levels 30 , 31 . This model has been widely applied to investigate the tunneling effect in condensed matter physics, 32 , 33 multi-particle systems, 34 , 35 optical structures, 36 – 38 and acoustics 39 . The LZ model provides an easy yet effective way to modulate/control the light transport due to its flexible and convenient realization in 2D optical circuits.…”

Study of the structural and optical properties of thallium gallium disulfide (TlGaS2) thin films grown via thermal evaporation

“…Progress in materials science and processing technology has resulted in the generation and identification of many new electronic and optoelectronic materials, with a recent focus on the mechanical exfoliation of layered semiconductors into two-dimensional (2D) structures [1][2][3]. 2D compounds have excellent characteristics such as high mobility, high conductivity and superior mechanical strength which are utilized in optoelectronic applications [4][5][6]. Moreover, they provide several distinct features due to their nanometer thickness, such as thickness-dependent electronic structure.…”