On-chip spatiotemporal optical vortex generation using an integrated metal-dielectric resonator

Abstract

We theoretically demonstrate the possibility of generating a spatiotemporal optical vortex (STOV) beam in a dielectric slab waveguide. The STOV is generated upon reflection of a spatiotemporal optical pulse from an integrated metal-dielectric structure consisting of metal strips "buried" in the waveguide. For describing the interaction of the incident pulse with the integrated structure, we derive its "vectorial" spatiotemporal transfer function (TF) describing the transformation of the electromagnetic field components of the incident pulse. We show that if the TF of the structure corresponds to the TF of a spatiotemporal differentiator with a $\pi /2$ phase difference between the terms describing temporal and spatial differentiation, then the envelope of the reflected pulse will contain an STOV in all nonzero components of the electromagnetic field. The obtained theoretical results are in good agreement with the results of rigorous numerical simulation of the STOV generation using a three-strip metal-dielectric integrated structure. We believe that the presented results pave the way for the research and application of STOV beams in the on-chip geometry.

arXiv comment14 pages, 5 figures

References in corpus (14)

• Photonic Cyclone: spatiotemporal optical vortex with controllable transverse orbital angular momentum
• Rigorous Theory of Optical Trapping by an Optical Vortex Beam
• Free-space propagation of spatio-temporal optical vortices (STOVs)
• Spatio-temporal vortex beams and angular momentum
• Spatio-temporal optical vortices
• Spatiotemporal Vortex Pulses: Angular Momenta and Spin-Orbit Interaction
• Second-harmonic generation and the conservation of spatiotemporal orbital angular momentum of light
• Mode structure and orbital angular momentum of spatiotemporal optical vortex (STOV) pulses
• Solving dielectric and plasmonic waveguide dispersion relations with a pocket calculator
• Spatiotemporal differentiators generating optical vortices with transverse orbital angular momentum and detecting sharp change of pulse envelope
• Symmetric and asymmetric solitons and vortices in linearly coupled two-dimensional waveguides with the cubic-quintic nonlinearity
• Generation of robust spatiotemporal optical vortices with transverse orbital angular momentum beyond $10^2$
• Ridge Resonance: A new Resonance Phenomenon for Silicon Photonics Harnessing Bound States in the Continuum
• Two-groove narrowband transmission filter integrated in a slab waveguide