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Nonreciprocal transmission in a nonlinear coupled heterostructure.
Optics Express
|December 23, 2022
Summary
A novel metal-nonlinear-metal-insulator-metal heterostructure exhibits tunable optical transmission. This non-Hermitian system shows reciprocal and nonreciprocal properties, leading to optical bistability at high incident power.
Area of Science:
- Photonics and optical metamaterials.
- Non-Hermitian physics and coupled mode theory.
Background:
- Nonlinear optical phenomena are crucial for advanced photonic devices.
- Reciprocal and nonreciprocal transmission in heterostructures offer unique functionalities.
Purpose of the Study:
- To propose and theoretically investigate a novel metal-nonlinear-metal-insulator-metal heterostructure.
- To explore its linear and nonlinear optical transmission characteristics, including reciprocity and optical bistability.
Main Methods:
- Nonlinear coupled mode theory was employed for theoretical modeling.
- Simulations were performed to investigate transmission behaviors under varying incident powers.
Main Results:
- The proposed heterostructure exhibits both reciprocal (low power) and nonreciprocal (high power) transmission.
- Simultaneous zero reflection points were achieved for forward propagation.
- Nonlinear effects lead to broken reciprocity and observed optical bistability at high incident power.
Conclusions:
- The theoretical study demonstrates novel optical responses in the proposed heterostructure.
- Its simple fabrication allows for potential experimental verification.
- Unique optical characteristics enable the design of multifunctional optical devices.
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