Experimental evidence of Bloch surface waves on photonic crystals with thin-film LiNbO_3 as a top layer

Lithium niobate (LN) based devices are widely used in integrated and nonlinear optics. This material is robust and resistive to high temperatures, which makes the LN-based devices table, but challenging to fabricate. In this work we report on the design, manufacturing and characterization of engineered dielectric media with thin film lithium niobate (TFLN) on top for the coupling and propagation of electromagnetic surface waves at the telecommunication wavelengths. The designed one-dimentional photonic crystal (1DPhC) sustains Bloch surface waves at the multilayer/air interface at 1550 nm wavelength with a propagation detected over a distance of 3 mm. The working wavelength and improved BSW propagation parameters open the way for exploration of nonlinear properties of BSW based devices. It is also expected that these novel devices will modify BSW propagation and coupling by external thermal/electrical stimuli due to the improved quality of the TFLN top layer of 1DPhC.

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“…After SEM investigation of the top surface of fabricated 1DPhC as discussed in [39], some residuals of SiO2 were detected (see Fig. 2a).…”

Section: Modeling Fabrication and Characterization Methodsmentioning

confidence: 99%

“…Recently this material was introduced as a top layer of BSWs based one-dimensional photonic crystal (1DPhC) structures [39]. It has been demonstrated experimentally that modifiable properties of one layer would bring a tunability to the whole 1DPhC [9,34].…”

Section: Introductionmentioning

confidence: 99%

Bloch surface waves at the telecommunication wavelength with lithium niobate as the top layer for integrated optics

et al. 2019

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“…Specially designed photonic devices represent the possibility of real-time, label-free selective detection of various chemical and biological species for a variety of medical research and environmental monitoring applications and particularly for the optical detection of miniscule quantities of molecules in highly diluted solutions [1–3]. Optical surface mode resonance indices such as surface plasmon polaritons (SPPs) [4–6], microcavity [7], guided-mode resonance [8, 9], and Bloch surface waves (BSW) [10–13] can be utilized to distinguish the generally small modulations of optical parameter(s) reflective of a given biomolecule concentration [14, 15].…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing

Shi

Rezk

et al. 2019

Nanoscale Res Lett

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In this study, a surface diffraction two-dimensional (2D) grating structure was placed on the topmost layer of distributed Bragg reflectors (DBRs) for biosensing. Bloch surface wave (BSW) resonance was realized by coupling a 2D subwavelength hole-array grating and could be excited at different locations: the surface of 2D-grating layer or the inter-face between the DBR and bio-solution. Material losses in the multilayer dielectric were measured to test the robustness of this scheme. Both the surface diffraction-grating BSW (DG-BSW) and the alternative guided grating-coupled BSW (GC-BSW) configuration showed markedly enhanced angular sensitivity compared to conventional prism-coupled schematics. Exciting these modes using a grating-coupling technique appears to yield different extreme sensitivity modes with a maximum of 1190°/RIU for DG-BSW and 2255°/RIU for GC-BSW. Refractive index sensors with a high figure of merit may be realized via such compact configurations.

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“…They include waveguides [16,17], lenses [5,18], disk resonators [19,20], BSW reflectors [21], Bessel-like beams [22][23][24][25], subwavelength focusers [26], phase-shifted Bragg gratings [27] and grating couplers [28,29]. Moreover, tunable planar optical components on BSW platforms have been demonstrated [30,31]. However, to envision BSW-based 2D integrated optical systems, detectors and light sources are inevitable elements to be studied.…”

Section: Introductionmentioning

confidence: 99%

Bloch Surface Waves Using Graphene Layers: An Approach toward In-Plane Photodetectors

et al. 2018

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A dielectric multilayer platform was investigated as a foundation for two-dimensional optics. In this paper, we present, to the best of our knowledge, the first experimental demonstration of absorption of Bloch surface waves in the presence of graphene layers. Graphene is initially grown on a Cu foil via Chemical Vapor Deposition and transferred layer by layer by a wet-transfer method using poly(methyl methacrylate), (PMMA). We exploit total internal reflection configuration and multi-heterodyne scanning near-field optical microscopy as a far-field coupling method and near-field characterization tool, respectively. The absorption is quantified in terms of propagation lengths of Bloch surface waves. A significant drop in the propagation length of the BSWs is observed in the presence of graphene layers. The propagation length of BSWs in bare multilayer is reduced to 17 times shorter in presence of graphene monolayer, and 23 times shorter for graphene bilayer.

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Experimental evidence of Bloch surface waves on photonic crystals with thin-film LiNbO_3 as a top layer

Cited by 24 publications

References 24 publications

Bloch surface waves at the telecommunication wavelength with lithium niobate as the top layer for integrated optics

Bloch surface waves at the telecommunication wavelength with lithium niobate as the top layer for integrated optics

Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing

Bloch Surface Waves Using Graphene Layers: An Approach toward In-Plane Photodetectors

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