Strong Coupling in Microcavity Structures: Principle, Design, and Practical Application

All-optical multi-channel switching at telecommunication wavelengths based on tunable plasmon-induced transparency

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A review of silicon subwavelength gratings: building break-through devices with anisotropic metamaterials

We demonstrate a compact high-performance adiabatic 3-dB coupler for the silicon-on-insulator platform. The refractive index of the gap region between two coupling waveguides is effectively increased using subwavelength grating, which leads to high-performance operation and a compact design footprint, with a mode-evolution length of only 25 µm and an entire device length of 65 µm. The designed adiabatic 3-dB coupler has been fabricated using electron beam lithography and the feature size used in our design is CMOS compatible. The fabricated device is characterized in the wavelength range from 1500 nm to 1600 nm, with a measured power splitting ratio better than 3 ± 0.27 dB and an average insertion loss of 0.20 dB.

Compact high-performance adiabatic 3-dB coupler enabled by subwavelength grating slot in the silicon-on-insulator platform

We propose and analyze via simulation a novel approach to implement a complementary metal-oxide-semiconductor compatible and high extinction ratio transverse magnetic pass polarizer on the silicon-on-insulator platform with a 340 nm thick silicon core. The TM-pass polarizer utilizes a highly doped p-silicon waveguide as the transverse hybrid plasmonic waveguide. We observed an extinction ratio of 30.11 dB and an insertion loss of 3.08 dB for a device length of 15 µm. The fabrication process of the proposed TM-pass polarizer is simpler compared to the state-of-the-art since it only uses silicon waveguides and does not require any special material or feature size.

CMOS compatible all-silicon TM pass polarizer based on highly doped silicon waveguide

Particle swarm optimization (PSO) and invasive weed optimization (IWO) algorithms are used for extracting the modeling parameters of materials useful for optics and photonics research community. These two bio-inspired algorithms are used here for the first time in this particular field to the best of our knowledge. The algorithms are used for modeling graphene oxide and the performances of the two are compared. Two objective functions are used for different boundary values. Root mean square (RMS) deviation is determined and compared.

Bio-inspired optimization algorithms for optical parameter extraction of dielectric materials: A comparative study

We demonstrate a broadband sub-wavelength grating coupler for the O-band application, which has a simulated coupling efficiency of −3.3 dB with 3-dB bandwidth of 78 nm and a measured coupling efficiency of −4.5 dB with a 3-dB bandwidth of 65 nm for fundamental TE mode.

Broadband sub-wavelength grating coupler for O-band application

We present a novel CSPR controllable silicon photonic transmitter circuit based on a tunable power splitter for VSB self-coherent transmissions. 112 Gb/s 16 QAM over 80 km at a BER below 3.8×10−3 has been achieved.

SiPh Self-Coherent Transmitter Circuit with on-Chip CSPR Control Capability Based on a Tunable Power Splitter

We demonstrate a compact, single-etched sub-wavelength grating coupler for the O-band application, which has a measured insertion loss of −4 dB, a 3-dB bandwidth of 39 nm, back reflections below −20 dB, and a design footprint of 20um × 40um.

Ghulam Saber

Papers

Bio-inspired optimization algorithms for optical parameter extraction of dielectric materials: A comparative study

Broadband sub-wavelength grating coupler for O-band application

SiPh Self-Coherent Transmitter Circuit with on-Chip CSPR Control Capability Based on a Tunable Power Splitter

O-band sub-wavelength grating coupler