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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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Published on: July 5, 2019

Tunable optical bistability of two-dimensional tilted Dirac system.

Vivek Pandey¹, Pankaj Bhalla¹

¹Department of Physics, School of Engineering and Sciences, SRM University AP, Amaravati 522240, India.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|March 26, 2024

Summary

We explored optical bistability in 2D tilted Dirac systems, finding that light-by-light control is tunable via the system's nonlinear response. This research offers insights for advanced optical device development.

Keywords:

Boltzmann approach bistability nonlinear tilted Dirac system

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Area of Science:

Condensed Matter Physics
Quantum Optics
Materials Science

Background:

Optical bistability is a key phenomenon where light controls light.
Two-dimensional (2D) Dirac systems exhibit unique electronic properties.
Controlling light-matter interactions in these systems is crucial for optical technologies.

Purpose of the Study:

To investigate optical bistability in a 2D tilted Dirac system.
To understand how nonlinear optical response influences this phenomenon.
To explore tunability of optical bistability through system parameters.

Main Methods:

Utilizing the Boltzmann approach with relaxation time approximation.
Analyzing the nonlinear response of the 2D tilted Dirac system.
Considering a prototype system with broken inversion symmetry.

Main Results:

Optical bistability is effectively controlled by the system's nonlinear response.
The phenomenon is tunable by adjusting the tilt strength, energy gap, and chemical potential.
Demonstrated tunability in an inversion symmetry broken system.

Conclusions:

The nonlinear response is central to achieving optical bistability in these systems.
Tunable optical bistability opens avenues for novel optical device applications.
Findings provide foundational insights for next-generation photonic and electronic devices.