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

Abstract

Combining two or several functionalities into a single metadevice is of significant importance and attracts growing interest in recent years. We here introduce the concept of modularization design in dual-wavelength multifunctional metadevice, which is composed of a lower metasurface and an upper metasurface with an indium-tin-oxide (ITO) layer. Benefiting from the fact that ITO holds high infrared (IR) reflection while transparence at visible wavelengths, the metadevice can work in reflection and transmission modes at two very distinct wavelengths, one is 2365 nm in the IR band and the other 650 nm in the visible range. More interestingly and importantly, the two metasurface layers with different functionalities are easy to flexibly integrate into a series of dual-wavelength multifunctional metadevices, with negligible interaction between them and no need of re-designing or re-optimizing their structure parameters. Based on modularization design and functional integration, four kinds of dual-wavelength multifunctional metadevices are demonstrated, which can perform reflective deflection/focusing at 2365 nm and transmissive deflection/focusing at 650 nm. We believe our work may open a straight-forward and flexible way in designing multi-wavelength multifunctional metadevices and photonic integrated devices.

Dual-wavelength dielectric metasurface for full-space light manipulations

“…Recently, metasurfaces working in full-spaces have also been demonstrated [20][21][22][23][24][25][26][27][28][29]. In particular, current multi-wavelength full-space metasurfaces mostly tailor the light wavefront based on the geometric phase by simply engineering the orientation angle of an individual type of nanostructure and therefore their operations are limited to circularly polarized light [25][26][27][28][29][30].…”

Dual-Band Metasurfaces Using Multiple Gap-Surface Plasmon Resonances

“…[8][9][10][11][12][13][14][15][16][17] Multiwavelength metasurfaces have been demonstrated previously using complex metaatoms with additional geometrical parameters to achieve well-defined phases and amplitudes for different wavelengths. [18][19][20][21][22][23][24][25] For example, two independently designed metasurfaces were combined within an indium-tin-oxide layer to realize multifunctional meta-devices at both the visible and infrared wavelengths. 22 Another popular way is to design meta-atoms with polarization-selective wavelength response enabling the independent control at different wavelengths with different input polarizations.…”

“…[18][19][20][21][22][23][24][25] For example, two independently designed metasurfaces were combined within an indium-tin-oxide layer to realize multifunctional meta-devices at both the visible and infrared wavelengths. 22 Another popular way is to design meta-atoms with polarization-selective wavelength response enabling the independent control at different wavelengths with different input polarizations. [23][24][25] However, due to the complex and selective nature of these approaches, flexible integration of both multiple functionalities and multiwavelength performance is difficult to achieve.…”