Berlin 2024 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 43: Optical Properties II

HL 43.2: Talk

Thursday, March 21, 2024, 09:45–10:00, EW 561

Optical realization of Shubnikov - de Haas and other quantum oscillations in THz transmission — •Maksim Savchenko — Vienna University of Technology

Due to causality-related correspondence between static and dynamic properties of physical systems, quantum oscillation observed in a DC response must reveal their counterpart in the optical domain.

In the talk, I will present the optical analogues of three types of the DC transport quantum oscillations. First, the optical realization of the microwave-induced resistance oscillations that are measured in the optical response, sub - terahertz transmittance of a two-dimensional system [1]. Second, the optical counterpart of the transport Shubnikov - de Haas oscillations, where we reveal two distinct types of oscillation nodes: 'universal' nodes at integer ratios of radiation and cyclotron frequencies and 'tunable' nodes at positions sensitive to all parameters of the structure. We analyse the nodes in both real and imaginary parts of the measured complex transmittance using a dynamic version of the static Lifshitz-Kosevich formula. And third, I will present the optical oscillations that have the same origin as transport magneto-intersubband oscillations.

These results reveal another advantage of the optical studies that provide a simultaneous access to quantization- and interaction-induced renormalization effects. And in conclusion, I will also discuss current opportunities and challenges to observe other well-known in DC transport effects in the optical domain.

[1] M. L. Savchenko et al., PRR 3, L012013 (2021).

Keywords: Shubnikov - de Haas oscillations; Microwave-indueced resistance oscillations; Dynamic conductivity; Transmission studies