This paper aims to investigate the enhancement of Kerr nonlinear performance caused by more optical confinement and longer propagation length due to different metal-cap wedge-shaped hybrid plasmonic waveguide geometric parameters. In this work, we will focus on Kerr nonlinear effect, and analyze how the different waveguide geometries can enhance this effect. Our theoretical investigation shows that the presented nonlinear wedge-shaped hybrid plasmonic waveguide structure with a wedge-shaped gap is suitable for photonic integrated circuits based on the hybrid plasmonic passive waveguide, and is a suitable candidate for the photonic devices at nano-scales with nonlinearity. It is also found that the investigated structure can have a longer propagation length of 2120 mm at a 10 nm thick nonlinear dielectric. The minimum effective mode area of the investigated structure is 0.0263 mm2 and the maximum nonlinear coefficient is . Also, the confinement factor of the DDMEBT layer is calculated by changing the wedge angle . It is found that the surface mode has a maximum confinement factor of 0.33 when . The modal and nonlinear properties of the hybrid plasmonic waveguides were analytically determined as well by using the finite element method (FEM). Simulation results show that the wedge-shaped hybrid plasmonic waveguide provides good performance for nonlinear applications such as optical switching at the optical wavelength of . تفاصيل المقالة

این مقاله یک موج‌بر پلاسمونیک نواری بسیار فشرده جدید فلز-عایق-فلز (MIM) بر روی ساختار سیلیکون بر روی عایق (SOI) پیشنهاد می‌کند. ساختار موج‌بر می‌تواند به‌طور مؤثر پلاریتون پلاسمون های سطحی (SPPs) را در یک ‌لایه نازک SiO2 با ضریب شکست کم در پنجره طول‌موج نوری 1550 نانومتر منتشر کند. پارامترهای اصلی شامل، ضریب شکست مؤثر، طول انتشار، ضریب تحدید و ناحیه حالت مؤثر برای موج‌بر پیشنهادی با پهناهای مختلف موج‌بر محاسبه شده است. نتایج شبیه‌سازی با موج‌بر پلاسمونیک MIM افقی قابل‌مقایسه می باشد. ساختار پیشنهادی می‌تواند به‌صورت یکپارچه با ادوات مبتنی برSOI عایقی مرسوم و پلاسمونیکی ترکیبی مجتمع سازی شده و پتانسیل متمرکز کردن نور، در ابعاد نانو را دارد. تفاصيل المقالة

In this article, we suggested a novel design of polarization splitter based on coupler waveguide on InP substrate at 1.55mm wavelength. Photonic crystal structure is consisted of two dimensional (2D) air holes embedded in InP/InGaAsP material with an effective refractive index of 3.2634 which is arranged in a hexagonal lattice. The photonic band gap (PBG) of this structure is determined using the plane wave expansion (PWE) method by RSOFT Bandsolve software.  Band diagram also show an overlap of two photonic bandgaps for both TE and TM about 1.55 mm wavelength. Also, the band structure is calculated for a lattice constant of 625 nm and a radius of 266.6 nm. The proposed polarization splitter has a transmission spectral of 75% and 70% for the TE and TM polarized light, respectively. The proposed polarization splitter is realized in a standard semiconductor technology on InP substrate at 1.55 µm wavelength and can be easily monolithically integrated with other planar integrated circuits. تفاصيل المقالة