Metainterface and Application for High-Performance Spectro-Polarimetric Filter

Abstract

Metasurface attracts much attention but lacks the modulation ability along the beam propagation direction, which confines its ability to control the wavelength and polarization of light. We propose a new concept of metainterface by embedding a two-dimensional metamaterial in a layered structure with vertical control ability. It can hugely improve the light control power and generate excellent characteristics while keeping simple fabrication processes. A high-performance spectro-polarimetric filter, which is based on the interface composed of one-dimensional photonic crystals and 10 nm thick Al grating, is fabricated for demonstration. Experimental results show that it can simultaneously have a polarization extinction ratio (PER) of 800 and a spectral resolution power (SRP, λ/Δλ) of 113, which are, respectively, 74 and 9 times better than the recently obtained best results of the metasurface. Moreover, it can break the limitation of diffraction and achieve much higher PER with limited size gratings. Because of these characteristics, it has great potential in miniature and integrated spectropolarimeters.

Generalized Fano resonance theory based on Fabry-Perot cavity

“…To verify that the difference in the continuous states leads to different Fano line shapes by decomposition analysis, we use the S-parameter to calculate the reflection and phase of these three parts (Au sphere, Au membrane, and continuous state layer). Using the equivalent film theory in thin film optics [41], the mode interaction in RCM and ICM is reflected through the transmission and reflection of the films. The S-parameter calculation results for the three parts are shown in figures S2 and 4(c): reflection, transmission, reflection and transmission phases respectively.…”

法布里-珀罗光学微腔及其应用

“…(b), (c) experimental results of transmission spectra of structure in (a) under different polarized incident lights [14] ; (d) metainterface spectrumpolarization filter model [18] ; (e) crosssectional image of metainterface filter captured by SEM [18] ; (f) experimental results of metainterface filter. Solid line and dotted line are transmittances of TM and TE lights of metainterface filter, respectively, while dashed line and dashdot line are polarization extinction ratios of metainterface filter and bare grating, respectively [18] 特邀综述 Right graph shows dashed image of growth model [12] ; (b) schematic diagram of structure of coupled open microcavity [13] ; (c) schematic diagram of mode splitting and corresponding coupled cavity structure (top panel), and experimental results (dots) and theoretical values (dashed lines) obtained from laser transmission experiments (bottom panel) [13] 图 23 引入超表面结构的 F [19] 1623009 -20 24 Multivortex pulsed beam laser [16] . Spatial encoding is achieved by combining specific components of vortex beam, while temporal encoding is achieved by modulating pulse realize accurate parameter measurement, biological detection, and regulation for multidimensional light fields.…”

Maximal circular polarization isolation and asymmetric polarization conversion by chiral meta-structure

“…In recent years, metasurfaces [2][3][4][5][6][7][8][9][10][11][12][13][14][15], and metamaterials [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] have emerged as promising platforms to engineer optical chirality enabling unprecedented control over the electromagnetic behavior of light. Meta-structures have been employed to create spectrometer filters [32], lensing [33], structural colors [34], and holographic structures [35], owing to their ultrathin profile and flat optics. Among the extensive body of research on chiral metamaterials, only a minimal fraction of these structures exhibit optimal performance, often pursued by either absorption losses, reflection losses, or a combination of both.…”