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Active terahertz modulator based on optically controlled organometal halide perovskite MAPbI2Br
Applied Optics
|February 24, 2022
Summary
This study introduces an optically controlled organometal halide perovskite modulator for terahertz waves. The novel perovskite material demonstrates significant optical-power-dependent modulation of terahertz transmission.
Area of Science:
- Optoelectronics
- Materials Science
- Terahertz Technology
Background:
- Terahertz (THz) modulators are crucial for THz applications.
- Organometal halide perovskites offer tunable optoelectronic properties.
- Controlling THz wave transmission optically is an active research area.
Purpose of the Study:
- To propose and investigate an active terahertz modulator.
- To utilize optically controlled organometal halide perovskite (MAPbI2Br) for THz modulation.
- To characterize the modulation performance of the MAPbI2Br/Al2O3 composite.
Main Methods:
- Fabrication of a MAPbI2Br/Al2O3 composite sample.
- Measurement of terahertz wave time-domain transmission using a THz time-domain spectrometer.
- Evaluation of optical-power-dependent modulation effects.
Main Results:
- The MAPbI2Br/Al2O3 sample exhibited a clear optical-power-dependent modulation of THz wave transmission.
- A maximum modulation depth of 59.99% was achieved at 0.3 THz.
- This performance was observed with an external pump optical power of 1500 mW.
Conclusions:
- Optically controlled MAPbI2Br is a promising material for active terahertz modulators.
- The proposed modulator demonstrates efficient control over THz wave transmission.
- Further research can explore optimization for enhanced modulation depth and lower power consumption.
