Results 31 to 40 of about 220,487 (206)
Mid‐Infrared on‐Chip Dichroic Filters Enabled by Adiabatic Evolution and Dispersion‐Engineered Subwavelength Grating Waveguides [PDF]
NanophotonicsAn on‐chip mid‐infrared dichroic filter is demonstrated using an asymmetric directional coupler theory comprising a longitudinally segmented subwavelength‐grating waveguide and a strip waveguide. Suppressed slot‐like scattering loss and precise dispersion engineering yield flat‐top responses over 3.3–3.7 μm, ∼0.9 dB insertion loss, ∼1 dB/nm roll‐off ...
Liu Y +6 more
europepmc +2 more sources
Investigation of Hybrid Silicon-Nitride/Polymer Waveguides for Second-Harmonic Generation
IEEE Photonics Journal, 2019 We propose a hybrid silicon-nitride (Si3N4 or SiN for short)/nonlinear polymer waveguide to achieve second-harmonic generation of an input 1550 nm signal by modal phase-matching between zero-order spatial mode at 1550 nm and second ...
Subrata Das +4 more
doaj +1 more source
Ultrabroadband Compact Graphene–Silicon TM-Pass Polarizer
IEEE Photonics Journal, 2017 Graphene is treated as an anisotropic material because it is one atom thick and its π electrons cause electric conduction in its plane. Based on the polarization-dependent absorption, we design compact broadband transverse-magnetic (TM)-pass ...
Xiao Hu, Jian Wang
doaj +1 more source
Quadratic phase matching in slot waveguides [PDF]
Optics Letters, 2006 We analyze phase matching with reference to frequency doubling in nanosized quadratic waveguides encompassing form birefringence and supporting cross-polarized fundamental and second-harmonic modes. In an AlGaAs rod with an air void, we show that phase-matched second-harmonic generation could be achieved in a wide spectral range employing state-of-the ...
Andrea Di Falco +2 more
openaire +5 more sources
A Tunable Dispersion Waveguide Based on Graphene–Silicon Lateral Slot Geometric Structure
IEEE Photonics Journal, 2017 The dispersion profiles of a hybrid graphene–silicon (HyGS) slot waveguide with trilayers of graphene are investigated in this paper. By tuning the bias voltage on graphene layer, the zero dispersion wavelengths (ZDW) of HyGS slot waveguide can be
Zhen Li +4 more
doaj +1 more source
A Metal-Assisted Silicon Slot Waveguide for Highly Sensitive Gas Detection
IEEE Photonics Journal, 2017 A metal-assisted silicon slot waveguide for highly sensitive gas detection is proposed. To show the superiority of the proposed structure, the optical confinement factor in the gas region and the sensitivity are theoretically investigated using the 2-D ...
Yuhei Ishizaka +3 more
doaj +1 more source
Silicon-on-insulator slot-waveguide design trade-offs
, 2015 Silicon-on-insulator slot-waveguide structures are designed and analysed numerically. We present our theoretical investigation of field confinement factors and effective nonlinear areas for different waveguide structures in order to find optimized ...
Steglich, P +11 more
core +4 more sources
Simultaneous Optical Half-Adder and Half-Subtracter Using a Single-Slot Waveguide
IEEE Photonics Journal, 2013 We propose a simple approach for simultaneous optical half-adder and half-subtracter using a single-slot waveguide that offers tight light confinement and enhanced nonlinearity.
Chengcheng Gui, Jian Wang
doaj +1 more source
Water Cladded Plasmonic Slot Waveguide Vertically Coupled With Si3N4 Photonics
IEEE Photonics Journal, 2018 We demonstrate a water cladded plasmo-photonic waveguide, by exploiting the directional coupling scheme to vertically divert light from a 360 × 800 nm (height × width) Si3N4 waveguide to a plasmonic slot waveguide, enabling the ...
George Dabos +11 more
doaj +1 more source
Electronics Letters, 1997 A waveguide slot element, excited by a thin strip, printed and kept behind the slot is presented. The slot is vertical and non-wrap around, whereas the strip is inclined with respect to the slot or takes an L-shape. The strip and the slot are printed simultaneously on a dielectric substrate and replaces the narrow wall of the guide.
S. Apu, M. Sachidananda
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