Abstract
A paradigm for high buffering performance with an essential fulfillment for sensing and modulation was set forth. Through substituting the fundamental two rows of air holes in an elongated hexagonal photonic crystal (E-PhC) by one row of the triangular gaps, the EPCW is molded to form an irregular waveguide. By properly adjusting the triangle dimension solitary, we fulfilled the lowest favorable value of the physical-size of each stored bit by about Besides, the EPCW is highly sensitive to refractive index (RI) perturbation attributed to the medium through infiltrating the triangular gaps inside the EPCW by microfluid with high RI sensitivity of about 379.87 nm/RIU. Furthermore, dynamic modulation can be achieved by applying external voltage and high electro-optical (EO) sensitivity is obtained of about 748.407 nm/RIU. The higher sensitivity is attributable to strong optical confinement in the waveguide region and enhanced light-matter interaction in the region of the microfluid triangular gaps inside the EPCW and conventional gaps (air holes). The EPCW structure enhances the interaction between the light and the sensing medium.
Highlights
The scrutinized structure is based on the merging between hexagonal and square latThe scrutinized structure is based on the merging between hexagonal and square tices to produce elongated hexagonal photonic crystal (E-photonic crystal (PhC)) [16]
The EPCW exhibits strong light confinement, which gives intensification to the optical mode with a guided-mode wavelength that is vastly sensitive to refractive index (RI) perturbation attributed to the medium through infiltrating the air holes of EPCW by microfluid
The EPCW can be used as a RI sensor with a RI sensitivity of 379.87 nm/RIU by filling the triangular gaps inside the EPCW
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Slotted photonic crystal waveguides (SPCWs) with various PCW modalities, have been anticipated theoretically and experimentally demonstrated [1] They are created by opening a narrow slot or irregular air gaps as a line-defect inside a PCW. Due to the discontinuity at the interface of silicon slab with high refractive index and air gaps with low index, the electric/magnetic field in the air gaps with low index is enhanced [2], with associated optical-buffer enhancement accessible from the PCW [3]. They can be advantageously used in high-sensitivity sensors [4], optical switches [5], and high-speed electro-optical modulators [6], etc.
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