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Photonics Dictionary

Floquet-Bloch oscillations

Floquet-Bloch oscillations refer to a phenomenon in condensed matter physics, specifically in the context of periodic potential systems subjected to an oscillating external field or periodic modulation. 

Bloch oscillations: In solid-state physics, Bloch oscillations describe the periodic motion of charge carriers (electrons or holes) in a crystalline lattice structure under the influence of a static electric field. This motion is characterized by electrons moving through the lattice and experiencing a periodic acceleration due to the interaction with the crystal's periodic potential.

Floquet theory: Floquet theory is a mathematical framework used to analyze the behavior of systems that are periodically driven or modulated in time. It describes solutions to differential equations under periodic boundary conditions.

When combined, Floquet-Bloch oscillations refer to the oscillatory behavior of charge carriers in a crystalline lattice that is subjected to both a periodic potential (due to the lattice structure) and a time-varying external field or modulation. This results in a complex interplay of periodic dynamics where the charge carriers exhibit oscillatory motion that differs from standard Bloch oscillations due to the additional influence of the time-dependent modulation.

Floquet-Bloch oscillations are significant in understanding the behavior of electrons and other charge carriers in semiconductor superlattices, quantum wells, and other periodic potential structures subjected to oscillating fields or modulations, offering insights into quantum transport phenomena and potential applications in electronic and photonic devices.

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