A Multichannel Superconductor-Based Photonic Crystal Optical Filter Tunable in the Visible and Telecom Windows at Cryogenic Temperature

Abstract

We design and evaluate the performance of a one-dimensional photonic crystal (PhC) optical filter that comprises the integration of alternating layers of a barium titanate ferroelectric (BaTiO3) and an yttrium oxide dielectric (Y2O3), with a critical high-temperature superconductor defect, yttrium–barium–copper oxide (YBa2Cu3O7−X), resulting in the (BTO/Y2O3)N/YBCO/(Y2O3/BTO)N multilayered nanostructure array. Here, we demonstrate that such a nanosystem allows for routing and switching optical signals at well-defined wavelengths, either in the visible or the near-infrared spectral regions—the latter as required in optical telecommunication channels. By tailoring the superconductor layer thickness, the multilayer period number N, the temperature and the direction of incident light, we provide a computational test-bed for the implementation of a PhC-optical filter that works for both wavelength-division multiplexing in the 300–800 nm region and for high-Q filtering in the 1300–1800 nm range. In particular, we show that the filter’s quality factor of resonances Q increases with the number of multilayers—it shows an exponential scaling with N (e.g., in the telecom C-band, Q≈470 for N=8). In the telecom region, the light transmission slightly shifts towards longer wavelengths with increasing temperature; this occurs at an average rate of 0.25 nm/K in the range from 20 to 80 K, for N=5 at normal incidence. This rate can be enhanced, and the filter can thus be used for temperature sensing in the NIR range. Moreover, the filter works at cryogenic temperature environments (e.g., in outer space conditions) and can be integrated into either photonic and optoelectronic circuits or in devices for the transmission of information.

Diseño de filtro óptico sintonizable en el infrarrojo cercano a temperaturas criogénicasas

“…Este trabajo permite diseñar filtros ópticos que pueden ser usados en aplicaciones tales como sensores de temperatura, filtros policromáticos (esto se puede apreciar mejor con otros resultados que se encuentran en el artículo original (González et al, 2022)), y biosensores, entre otros a muy bajas temperaturas (Chen et al, 2022;Hao et al, 2020;Soltani et al, 2021;Zaky & Aly, 2020).…”

“…Segundo, la función dieléctrica de un superconductor (la cual define el comportamiento óptico del material) depende principalmente de la temperatura y el campo magnético externo(González et al, 2020). Debido a esto, los materiales superconductores de alta temperatura resultan interesantes para la implementación de cristales fotónicos sintonizables en una amplia variedad de aplicaciones tales como sensores de temperatura, filtros policromáticos y biosensores, entre otros(Chen et al, 2022;Hao et al, 2020;Soltani et al, 2021;Zaky & Aly, 2020).En este artículo(González et al, 2022), se caracteriza y diseña computacionalmente un filtro óptico unidimensional que puede ser integrado en redes ópticas basadas en multiplexación por longitud de onda (WDM, por sus siglas en inglés), con un alto factor de calidad Q, que transmite información en el rango visible e IR cercano en ambientes de muy baja temperatura como las del espacio exterior.…”

The Narrow-Band Filter Based on a Magnetophotonic Crystal Involving Layers With Hyperbolic Dispersion Laws

“…Photonic crystal resonators demonstrating high Q-factors open up possibilities for narrow-band signal fi ltering, which is especially important for telecommunication systems, sensors, spectroscopy, etc. [24][25][26][27][28][29][30][31][32][33]. Th e waveguides and resonators required for the purpose are implemented through formation of linear and local periodicity defects in the photonic crystals.…”

Optical and Mechanical Properties of Layered Infrared Interference Filters

“…The authors [ 6 ] developed an optical filter based on photonic crystals, which includes alternating layers of barium titanate ferroelectric (BaTiO 3 ) and yttrium oxide (Y 2 O 3 ) dielectric, with a critical defect of the high-temperature superconductor, yttrium-barium-copper oxide. It is a superconductor-based multichannel photonic crystal optical filter tunable in visible and telecommunication windows at cryogenic temperature.…”