Full-Stokes Polarization Perfect Absorption with Diatomic Metasurfaces

Abstract

Metamaterial-based perfect absorbers provide efficient ways for selective absorption of light with both linear or circular polarizations. Perfect absorption for an arbitrary polarization requires the development of subwavelength structures absorbing efficiently elliptically polarized light, but they remain largely unexplored. Here, we design and realize experimentally novel plasmonic metasurfaces for full-Stokes polarization perfect absorption in the mid-infrared. The metasurface unit cell consists of coupled anisotropic meta-atoms forming a diatomic metamolecule. The designed plasmonic metastructures provide a strong field enhancement by at least 1 order of magnitude higher than conventional perfect absorbers. In experiment, our plasmonic metasurfaces demonstrate sharp differentiation of spectral responses for an arbitrary pair of orthogonal polarization states (linear, circular, or elliptical) providing perfect absorption for one polarization with strong reflection for its counterpart. Our results suggest a novel route for efficient control of light polarization in metasurfaces offering numerous potential applications ranging from thermal imaging to chiral molecule detection.

Hybrid anisotropic plasmonic metasurfaces with multiple resonances of focused light beams

“…To evenly coat the sidewalls of the pillars and gratings with gold, we tilted the sample at 45°using a holder and did the sputtering four times at different sample orientations. 47 The scanning electron microscope (SEM, Zeiss Supra) images of the fabricated sample are displayed in Figure 4a. We measured the reflection spectra of the fabricated metasurface by using a Fourier-transform infrared spectroscopy (FTIR Bruker) system, where a linear polarizer was used to control the polarization and the collimated mid-IR beam was focused on the fabricated sample by a reflective objective (Figure S4a in the Supporting Information).…”

Dynamic Augmented Reality Display by Layer‐Folded Metasurface via Electrical‐Driven Liquid Crystal

“…The invention of metasurfaces creates new degrees of freedom to control light at the subwavelength resolution and emerges as a promising platform for novel optical meta‐devices and meta‐systems. Various fascinating functionalities have been achieved by single‐layer metasurface design, including perfect absorber, [ 1,2 ] nanoprinting display, [ 3–5 ] beam steering, [ 6,7 ] metalens, [ 8,9 ] meta‐holography, [ 10–18 ] and many others. [ 19,20 ] However, heading toward the development and achievement of more powerful meta‐devices and even more complicated meta‐systems, it inevitably demands the cascading and coupling between multi‐layer metasurfaces as a feasible design strategy.…”

“…absorber, [1,2] nanoprinting display, [3][4][5] beam steering, [6,7] metalens, [8,9] metaholography, [10][11][12][13][14][15][16][17][18] and many others. [19,20] However, heading toward the development and achievement of more powerful meta-devices and even more complicated meta-systems, it inevitably demands the cascading and coupling between multilayer metasurfaces as a feasible design strategy.…”

Angular Multiplexing Nanoprinting with Independent Amplitude Encryption Based on Visible-Frequency Metasurfaces

“…The ability to arbitrarily manipulate light waves is always the pursuit and dream for researchers in the photonics field. Notably, the recent invention of a metasurface, a two-dimensional (2D) planar photonic element with subwavelength resolution, has emerged with the development of modern optics and nanophotonics. , Due to its unique optical properties, a plethora of significant applications have been realized based on metasurfaces, ranging from structural color, , holography, − to perfect absorbers, , sensors, metalens, , cloaking, , anomalous deflectors, etc. Besides these functionalities, metasurfaces also have been proposed and demonstrated with the breakthrough in imaging multiplexing and super-resolution enhancement to achieve nanoscale printing techniques for information encryption, − optical storage, and stereoscopic displays. , Various degrees of freedom in multiplexing strategies, including polarization multiplexing, − wavelength multiplexing, − wavevector forward/backward multiplexing (Janus metasurface), etc., have been extensively studied and demonstrated.…”

“…Notably, the recent invention of a metasurface, a twodimensional (2D) planar photonic element with subwavelength resolution, has emerged with the development of modern optics and nanophotonics. 1,2 Due to its unique optical properties, a plethora of significant applications have been realized based on metasurfaces, ranging from structural color, 3,4 holography, 5−7 to perfect absorbers, 8,9 sensors, 10 metalens, 11,12 cloaking, 13,14 anomalous deflectors, 15 etc. Besides these functionalities, metasurfaces also have been proposed and demonstrated with the breakthrough in imaging multiplexing and super-resolution enhancement to achieve nanoscale printing techniques for information encryption, 16−19 optical storage, 20 and stereoscopic displays.…”