Fig. 1
Schematic of 2D 90°-bend PSW structure. Λ is the period, η is the duty cycle, and R the curvature radius of the 90°-bend PSW.
Fig. 2
Overlap integral of the output 90°- bend PSW mode profile with a CWG mode profile with different waveguide widths and considering its core as being Si or being the equivalent material of the PSW (neq = 2.46 for silica cladding and neq = 2.5265 for SU-8 cladding).
Fig. 3
Confinement factor of the steady-state 90°- bend PSW mode profile as a function of the waveguide width.
Fig. 4
Intensity field profiles along 90°-bend PSWs. R = 5 µm, Λ □= 300 nm, η □= 0.5, and w = 300 nm with Si in the core and (a) Silica and (b) SU-8 in the claddings.
Fig. 5
Transversal output field profiles o 90°-bend PSWs and their equivalent 90°-bend CWG using refractive indexes (a) nclad = 1.444, ncore = 2.46 for silica cladding and (b) nclad = 1.577, ncore = 2.5265 for SU-8 cladding, respectively.
Fig. 6
Transmission coefficient of the 90°-bend PSWs as a function of the period Λ. η □= 0.5, R = 5 µm, w = 300 nm, core index nSi = 3.476, and wavelength λ = 1550 nm. Two different cladding materials are considered: Silica (red line) and SU-8 (blue line).
Fig. 7
Transmission coefficient in the 90°-bend PSW as a function of the period Λ. η □= 0.5, R = 5 µm, w = 300 nm, core index nSi = 3.476, and the cladding material is the silica.
Fig. 8
Overlap integral between φPSW and φCWG modes as a function of the duty cycle. Λ = 300, R = 5 µm, and w = 300 nm. Two different cladding materials are considered: Silica (red line) and SU-8 (blue line).
Fig. 9
Overlap integral between φPSW and φCWG modes as a function of the duty cycle. Λ = 300, R=5 µm, and w = 300 nm. Three different wavelengths are considered: λ = 1500 nm (black line), λ = 1550 nm (red line) λ = 1600 nm (blue line).
Fig. 10
Overlap integral between φPSW and φCWG modes as a function of wavelength. η = 0.5, Λ = 300, R = 5 µm, and w = 300 nm. Two different cladding materials are considered: Silica (blue line) and SU-8 (red line).
Fig. 11
Overlap integral between φPSW and φCWG modes as a function of wavelength. η = 0.5, Λ=300, and w = 300 nm. Five different curvature radius values are considered: R = 10 µm (blue line), R = 7 µm (red line), R = 5 µm (green line), R = 4 µm (black line) and R = 3 µm (magenta line) for SiO2 cladding.
Fig. 12
Transmission coefficient of 90°-bend PSWs as a function of wavelength and for η = 0.5, Λ=300, and w = 300 nm. Five different curvature radius values are considered: R= 10 µm (blue line), R = 7 µm (red line), R = 5 µm (green line), R = 4 µm (black line), and R = 3 µm (magenta line) for SiO2 cladding.
Fig. 6
Transmission coefficient of the 90°-bend PSWs as a function of the period Λ. η □= 0.5, R = 5 µm, w = 300 nm, core index nSi = 3.476, and wavelength λ = 1550 nm. Two different cladding materials are considered: Silica (red line) and SU-8 (blue line).
Fig. 7
Transmission coefficient in the 90°-bend PSW as a function of the period Λ. η □= 0.5, R = 5 µm, w = 300 nm, core index nSi = 3.476, and the cladding material is the silica.
Fig. 8
Overlap integral between φPSW and φCWG modes as a function of the duty cycle. Λ = 300, R = 5 µm, and w = 300 nm. Two different cladding materials are considered: Silica (red line) and SU-8 (blue line).
Fig. 9
Overlap integral between φPSW and φCWG modes as a function of the duty cycle. Λ = 300, R=5 µm, and w = 300 nm. Three different wavelengths are considered: λ = 1500 nm (black line), λ = 1550 nm (red line) λ = 1600 nm (blue line).
Fig. 10
Overlap integral between φPSW and φCWG modes as a function of wavelength. η = 0.5, Λ = 300, R = 5 µm, and w = 300 nm. Two different cladding materials are considered: Silica (blue line) and SU-8 (red line).
Fig. 11
Overlap integral between φPSW and φCWG modes as a function of wavelength. η = 0.5, Λ=300, and w = 300 nm. Five different curvature radius values are considered: R = 10 µm (blue line), R = 7 µm (red line), R = 5 µm (green line), R = 4 µm (black line) and R = 3 µm (magenta line) for SiO2 cladding.
Fig. 12
Transmission coefficient of 90°-bend PSWs as a function of wavelength and for η = 0.5, Λ=300, and w = 300 nm. Five different curvature radius values are considered: R= 10 µm (blue line), R = 7 µm (red line), R = 5 µm (green line), R = 4 µm (black line), and R = 3 µm (magenta line) for SiO2 cladding.
