Broadband asymmetric light transmission through tapered metallic gratings at visible frequencies

Abstract

Asymmetric transmission phenomenon has attracted tremendous research interest due to its potential applications in integrated photonic systems. Broadband asymmetric transmission (BAT) is a highly desirable but challenging functionality to achieve in the visible regime due to the limitation of material dispersion. In this paper, we propose and numerically demonstrate that a tapered-metal-grating structure (TMGS) can achieve high-contrast BAT spectra covering the entire visible region. The transmission efficiency reaches ~95% for the forward illumination and ~35% for the backward illumination at the same wavelengths, respectively, and the corresponding transmission ratio is larger than 2.5 over a broadband wavelength regime. Such a design with high performance suggests applications for unidirectional optical transmission, optical diode, and so on.

Broadband asymmetric light transmission interfaces for luminescent solar concentrators

“…A brief mesh analysis showed that a smaller mesh then produced approximately 3% variation in results. In addition, prior to performing the studies presented in this work, we benchmarked our simulation procedure using results presented in [19]. The procedure was also checked by comparing PMMA-air interface results with published transmissivity data for forward and backward propagation direction [29].…”

“…This concept of asymmetric light transmission is known as the Woods-Rayleigh anomaly, and was first discovered and quantified in the early 20 th century [14][15]. More recently this effect was investigated numerically for a number of nanostructured interfaces [16][17][18][19][20]. A recent work, relevant to the study discussed in this paper, is by Ozer et al [18] who showed asymmetric light transmission for normal incidence…”

Numerical Investigation on Multiple Resonant Modes of Double-Layer Plasmonic Grooves for Sensing Application

“…The one dimensional groove array, a simple structure, has attracted attention as a micro-nano sensor, which is easy to integrate. However, structural parameters exert a significant impact on the performance of the device [21][22][23][24]. Compared to a single-layer groove structure, double-layer plasmonic grooves can more freely adjust the wavelength position.…”

Tunable infrared asymmetric light transmission and absorption via graphene-hBN metamaterials

“…The second approach requires breaking the spatial inversion symmetry. In this case, the transmission of nonpolarized and circularly/linearly polarized light through a device is Lorentz-reciprocal and can be realized in very diverse systems, e.g., chiral structures, 1,8,9 metallic gratings, 6,10 and dielectric-based meta-devices. 11,12 Moreover, the combination of diffraction or subwavelength gratings with one-or two-dimensional photonic crystals, 2,5,13 near-zero-index metastructures, [14][15][16][17] and hyperbolic metamaterials (HMMs) 18 can also lead to the observation of AT for linearly polarized light in the resulting hybrid structures.…”