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Strain engineering of optical activity in phosphorene.
Doan Quoc Khoa1,2, Masoumeh Davoudiniya3, Bui Dinh Hoi4
1Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University Ho Chi Minh City Viet Nam doanquockhoa@tdtu.edu.vn.
RSC Advances
|May 6, 2022
Summary
Strain significantly alters phosphorene
Area of Science:
- Optoelectronics
- Condensed Matter Physics
- Materials Science
Background:
- Monolayer phosphorene exhibits strong anisotropy, leading to unique optoelectronic properties.
- Optical activity is a key phenomenon in understanding light-matter interactions in materials.
Purpose of the Study:
- To analyze the effects of strain on the optical activity of monolayer phosphorene.
- To investigate strain-induced changes in reflection, transmission, and absorption across various optical field strengths.
Main Methods:
- Numerical study using a two-band tight-binding model.
- Application of Harrison rule and linear response theory.
- Analysis of low- to high-optical-field regimes.
Main Results:
- Phosphorene remains transparent across all frequencies, irrespective of strain.
- Strain induces circular polarization and 180° rotation of the ellipse axis at critical strains.
- Maximum absorption occurs at high-energy transitions, strongly dependent on strain modulus and direction.
- In-plane compressive and out-of-plane tensile strains influence light reflection/transmission and absorption spectra.
Conclusions:
- Strain engineering offers a powerful method to tune the optical properties of phosphorene.
- The observed phenomena are dependent on the optical field regime, strain modulus, and orientation.
- These findings pave the way for developing novel phosphorene-based optoelectronic devices.
