Miniaturized Bloch Surface Wave Platform on a Multicore Fiber

Abstract

We propose a novel implementation of a miniaturized photonic platform fabricated on a multicore fiber tip, capable of tunable optical functions via coupling to Bloch surface waves (BSWs). A one-dimensional photonic crystal is deposited on the cleaved surface of a fiber tip, allowing the propagation of BSWs in the near-infrared. On top of each core, subwavelength gratings are fabricated to operate as optical couplers between BSWs and the corresponding fiber modes. The ability to control the optical interconnection among different pairs of cores of the multicore fiber via polarization-selective BSW coupling is demonstrated. The resulting compact, tunable, and portable platforms can be fruitfully employed in the vast application domain covered by optical fiber technology including sensing, optical trapping, manipulation, and information processing.

Design and optimization of two-dimensional porous lithium niobate grating birefringent Bloch surface wave sensor with high sensitivity and quality factor

“…2 When the sensor meets the ATR conditions, incident light propagates along two media with different refractive indices and is strongly confined at an interface, thus exciting surface waves (SWs). Both types of surface wave sensors can be excited by prisms, 3,4 gratings, 5 optical fibers, 6 and microcavities. 7 SPR sensor technology is mature but requires a noble metal layer for surface wave excitation, leading to significant absorption losses, lower quality factors (Q), poor stability, and higher manufacturing costs.…”

Theoretical analysis of optical Tamm mode excitation using dielectric nanoparticles

“…Recently, tremendous research work has been carried out to explore the capability of surface wave-based optical sensors for biochemical sensing applications [1,2]. Among them, optical sensors using optical Tamm modes (OTM) on the interface of a finite 1D-photonic crystal (1D-PhC) structure and analyte are considered promising because of their strong anti-interference ability, rapid detection, and high reliability [3][4][5][6][7]. The OTMs are extremely sensitive to surface perturbations and exhibit comparably better sensing capability along with low absorption, long propagation length, and spectral tunability [8,9].…”