Роль структурных несовершенств графена в резонансном туннелировании через локализованные состояния в h-BN барьере ван-дер-ваальсовых гетероструктур

Investigated resonant tunneling through defect levels in h-BN barrier van der Waals heterostructures. The effect of multiplication of tunnel resonances through these levels was found, due to the influence of a high degree of defectiveness of the structure of the neighboring layer of graphene, created by intentionally processing in plasma. Various mechanisms of such influence are discussed.

MODE TUNING IN PHOTONIC CRYSTAL CAVITIES USING GEOMETRY OF FIRST NEIGHBORING LAYER

The relation between position of optical source and excitation of photonic crystal cavity modes are investigated. For multimode cavities, the source position considerably affects the modes' excitation. The frequency distributions of local density of photonic states in a multimode cavity differ for source positions at structural symmetric locations and nonsymmetrical ones. It was also found that the geometry of cavity's neighboring layers has strong influence on the spatial and spectral distributions of modes. The results also show that the shifts of various cavity modes in frequency domain have different sensitivity with respect to geometrical tolerance. This can be used in various applications which need mode tuning.