Related Experiment Video
Updated: Dec 25, 2025
10:18
Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials
Published on: January 5, 2019
12.4K
Polarization beam splitter based on extremely anisotropic black phosphorus ribbons
Optics Express
|April 1, 2020
Summary
This study introduces an ultra-thin, highly efficient polarization beam splitter (PBS) using black phosphorus (BP) ribbons. The device demonstrates excellent performance across a broad frequency and angle range for mid-infrared applications.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Black phosphorus (BP) ribbons possess extreme anisotropic properties.
- Anisotropy in BP can be leveraged for polarization-dependent optical devices like transmitters or reflectors.
Purpose of the Study:
- To design and investigate a highly efficient, broad-angle polarization beam splitter (PBS) using anisotropic BP ribbons.
- To explore the performance of the BP-based PBS in the mid-infrared frequency region.
Main Methods:
- Utilized transfer matrix calculation for theoretical analysis.
- Employed finite element simulation for performance evaluation.
- Examined the influence of incident angle and device parameters.
Main Results:
- Achieved reflectivity and transmissivity greater than 80% over a broad frequency range (80.4–85.0 THz) and wide angles (>50°).
- Obtained high polarization extinction ratios: >25.50 dB for s-polarization and >20.40 dB for p-polarization.
- Demonstrated tunability of the PBS operation frequency via electron concentration in BP.
Conclusions:
- The designed ultra-thin BP ribbon structure enables a high-performance, broad-angle PBS in the mid-infrared spectrum.
- The device's tunable nature opens possibilities for practical applications, including tunable filters and mid-infrared sensors.
