Characterization of long-range plasmonic waveguides at visible to near-infrared regime

Abstract

Long-range surface plasmon polariton waveguides composed with thin gold stripes embedded in SU-8 polymer cladding with various stripe widths were fabricated. Material properties of the polymer cladding layer, gold thin film, and the device structures were discussed. Optical properties based on modal propagation were characterized at visible to near-infrared wavelengths. The measured propagation losses of waveguide widths from 3 to 9 μm at 633, 785, and 1550 nm are 7.5-18.8, 6.8-12.5, and 1.9-3.9 dB/mm, respectively. Guiding mode properties such as overlap integrals between the simulated and the measured fields and the polarization extinction ratios of the waveguides with different stripe widths were investigated at the telecommunication wavelength. Good accordance between the measurement and simulation results was presented.

Structure and mid-infrared optical properties of spin-coated polyethylene films developed for integrated photonics applications

“…The laser light is directed to a mid-IR camera (Tau 2, Teledyne FLIR LLC, USA) for inspecting the beam profile and focused by a parabolic mirror onto a thermoelectrically cooled MCT detector (PVI-4TE-10.6, Vigo Systems S.A., Poland) through the use of a ZnSe beam splitter (BSW711, Thorlabs). To extract the waveguide losses, the effective cut-back technique is used 44,[58][59][60][61] . The measurement procedure consists of inserting the waveguide between the lenses and carefully aligning the sample to maximize signal intensity.…”

“…The optical performance of the plasmonic devices was determined by transmission measurements using a custom-built measurement setup 44 . The propagation losses were determined by the effective cut-back method for each fabricated waveguide geometry [58][59][60][61] . The summary of the results in terms of waveguide and coupling losses is shown in Figure 7a.…”

Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ0 = 850 nm

“…Due to the requirement for LRSPP mode symmetry, high-RI sensing is difficult to implement with low index polymer claddings. Alternatively, the ultraviolet (UV) cured polymer SU-8 has a high RI (n~1.574) and has been used in the construction of SPP waveguides [17][18][19][20]. Its good physicochemical characteristics allow flexible designs and easy fabrication of LRSPP waveguide sensors, which work better for the detection of chemical reagents or mixtures detection with RIs over 1.5.…”

Integration of on-chip perovskite nanocrystal laser and long-range surface plasmon polariton waveguide with etching-free process

“…26 Due to being less bounded to the thin metal slab, the LRSPP mode propagates with low attenuation, thus resulting in a propagation length of up to hundreds of micrometers. 27 This fabrication technique offers the advantages of being compatible with sequential lithography processes, enabling the fabrication of high-quality and size-controlled optical cavities based on lead halide perovskite CsPbBr 3 nanocrystals, and thus accurate in controlling the relative position between the perovskite laser and LRSPP waveguide. Most importantly, the integration of the perovskite laser and the LRSPP waveguide can be precisely configured on a chip without any etching process.…”