Optical amplification in a charge density wave phase of a quasi-two-dimensional material

Article

关键词: DICHALCOGENIDES;    DYNAMICS;    TISE2;    MOS2;    WS2;   

DOI  :  10.1103/PhysRevB.105.235108

来源: SCIE

【 摘 要 】

We theoretically study the quenching of a charge-density wave phase in a model system of a quasi-twodimensional material, which includes both electron-hole and electron-phonon interactions leading, respectively, to excitonic and coherent-phonon contributions. We discuss how interaction processes affect anomalous expectation values and present a microscopic dynamical picture of the quenching of the phase. We use projection techniques to illustrate the time-dependent appearance of additional bands and anomalous expectation values. We propose an optical amplification effect with a high modulation frequency in the midinfrared regime.

【 授权许可】

Free