Nonlinearity of Absorption in an Exciton‐Phonon System

Nitsovich, Bohdan M.; Krechivskii, O. V.; Pestryakov, G. M.

doi:10.1002/pssb.2221480248

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“…It was established that the dynamic nonlinearity of optical absorption, which is favorable for implementing optical bistability at high laser intensities, is explained by the competition of the processes of excitation of exciton states and their relaxation due to the exciton-phonon interaction [13,14]. It was also noted that manifestation of optical bistability in layered crystals may have a specific feature, i.e., occurrence of indirect vertical phototransitions responsible for the formation of multistable states [11,15].…”

Section: Introductionmentioning

confidence: 99%

10.1007/s11449-008-2011-z

2010

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The effect of weak external magnetic fields on the conditions for implementing optical bistability in the region of exciton absorption of layered semiconductors has been theoretically investigated. By the example of the 2 H polytype of lead diiodide, it is shown that, changing the strength of an external magnetic field, one can form conditions for implementing bistability and effectively control the position and sizes of the hysteresis loop of exciton absorption.

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Section: Introductionmentioning

confidence: 99%