Saturation and bistability of defect-mode intersubband polaritons

Article

关键词: QUANTUM CASCADE LASERS;    PHOTONIC CRYSTAL;    MICROCAVITIES;    ABSORPTION;   

DOI  :  10.1103/PhysRevB.91.085308

来源: SCIE

【 摘 要 】

In this paper we report about linear and nonlinear optical properties of intersubband cavity polariton samples, where the resonant photonic mode is a defect state in a metallodielectric photonic crystal slab. By tuning a single geometric parameter of the resonator, the cavity Q factor can reach values as large as 85, with a consequent large cooperativity for the light-matter interaction. We show that a device featuring large cooperativity leads to sharp saturation, or even bistability, of the polariton states. This nonlinear dynamics occurs at the crossover between the weak-and the strong-coupling regimes, where the weak critical coupling concept plays a fundamental role.

【 授权许可】

Free