Control of Light-Matter Interaction in two-Dimensional Materials

Abstract

Two-dimensional (2D) Van der Waals materials have emerged as a very attractive class of optoelectronic material due to the unprecedented strength in its interaction with light. In this talk I will discuss approaches to enhance and control this interaction by integrating these 2D materials with microcavities, and metamaterials. I will first discuss the formation of strongly coupled half-light half-matter quasiparticles (microcavity excitonpolaritons) [1], their spin-optic [2], and electrical control/excitation (Fig. 1) [3], in the 2D transition metal dichalcogenide (TMD) systems. Prospects for enhanced nonlinear optical interaction using Rydberg states in TMDs will be discussed. Use of photonic hypercrystals and hyperbolic media to enhance the spontaneous emission from the TMDs will also be presented. Following this, I will discuss the routing of valley excitons in 2D TMDs using chiral metasurfaces (Fig. 2) [4]. Finally, time permitting, I will briefly talk about developing deterministic quantum emitters at room temperature using defects in hexagonal boron nitride [5] and prospects of coupling these emitters to high Q resonators.