Dual-wavelength multifunctional metadevices based on modularization design by using indium-tin-oxide.

Area of Science:

• Metasurface technology
• Nanophotonics
• Integrated optics

Background:

• Combining multiple functionalities into a single device is crucial for advanced photonic applications.
• Metadevices offer unique optical properties but integrating multiple functions, especially at different wavelengths, remains challenging.

Purpose of the Study:

• To introduce a modular design strategy for creating dual-wavelength multifunctional metadevices.
• To demonstrate flexible integration of metasurfaces for distinct optical operations at infrared and visible wavelengths.

Main Methods:

• Utilizing a modular design approach with separate lower and upper metasurfaces.
• Incorporating an indium-tin-oxide (ITO) layer for wavelength-dependent optical properties (IR reflection, visible transparency).
• Demonstrating integration of functional metasurfaces with negligible interaction.

Main Results:

• Successfully designed and demonstrated four types of dual-wavelength multifunctional metadevices.
• Achieved reflective deflection/focusing at 2365 nm (infrared) and transmissive deflection/focusing at 650 nm (visible).
• The modular design allows for flexible integration without structural re-optimization.

Conclusions:

• The proposed modularization design provides a straightforward and flexible method for creating dual-wavelength multifunctional metadevices.
• This approach facilitates the development of advanced photonic integrated devices with tailored functionalities.