Pdf Info.

Our PDF files are here for you.


Comments Off


Silicon-on-sapphire (SOS) is one of the proposed platforms for this region. This paper present a novel and rigorous modal analysis of the SOS. Learn more about the Silicon-on-Sapphire technology that ESI incorporate into their range of high standard products. See our website for more info. In this video, which is part 5 of his talk, "Commercializing Silicon on Sapphire (SOS) & Changing an Industry," Reedy discusses Peregrine's decision to.


Author: Lisette Mraz
Country: Dominica
Language: English
Genre: Education
Published: 2 September 2015
Pages: 567
PDF File Size: 10.65 Mb
ePub File Size: 21.14 Mb
ISBN: 207-2-32504-364-5
Downloads: 30576
Price: Free
Uploader: Lisette Mraz



In this analysis the cut-off conditions of the fundamental and higher order Silicon on sapphire and TM modes are defined. Hence we present the waveguide dimensions thicknesses and widths that can support optical modes in the MIR region and study the effect of this dimensions on the effective index of different modes.

This work is considered an exhaustive analysis of our previously published paper [ 12 ], where we had studied SOS waveguide at single dimension and wavelength. Our analysis is very useful in the design of various devices using the SOS platform in the MIR range, such as multimode interferometers MMIs, ring resonators and Mach—Zehnder interferometers, etc which are the main building blocks in lots of applications.

Optical waveguide polarizers are widely used components in integrated photonics circuits [ 13 ].

  • Silicon on Sapphire Wafers
  • What is Silicon-on-Sapphire Sensor (SOS) Technology?
  • 1. Introduction

Various designs have been proposed for integrated waveguide TE and TM pass polarizers in the NIR region using different techniques with both dielectric and plasmonic waveguides [ 14 — 18 ]. To the best of our knowledge no effort has be done in the mid- infrared region polarizer design.

Our designs are based simply on the fundamental idea of different cut-off [ 19 ]. A wideband TE polarizer working around 2. While, a wideband TM polarizer working around 3. The detailed modal analysis of the structure of the SOS waveguide has been performed using finite element method FEM based solver [ 20 ].

The silicon on sapphire polarization design based on the results of this detailed analysis has been verified using 3D full wave electromagnetic solution using finite difference time domain FDTD solver [ 21 ].

In section 2the dispersion analysis of SOS waveguide in the mid-infrared region at different widths and thicknesses are illustrated.

The small silicon thickness cannot support guided modes at the MIR region. Hence, to get efficient waveguides in the mid-infrared region we changed the insulator material from silicon dioxide SiO2 to sapphire Al2O3as the sapphire offers the ability to build high-confinement waveguides for wavelengths silicon on sapphire 1.

Also, the new dimensions that can support guided modes in the mid infrared region have to be explored. In our analysis silicon has been used as a high index material core using equation 1 from [ 23 ] and sapphire as a low index medium substrate using equation 2 from [ 24 ]: Due to the different boundary conditions for each polarization most of waveguide devices are polarization dependent [ 25 ].

Typically, TE and TM modes propagate with different propagation constants and have different cut-off conditions. Standard image High-resolution image Silicon on sapphire PowerPoint slide For certain refractive indices and waveguide dimensions the FEM solver is able to get the modes mode profile and effective index supported by this waveguide at certain operating wavelength.

For each wavelength and SOS thickness we start with small width were no guided modes can be resolved by the FEM solver and then we start increasing the waveguide width, with certain width step.

Part 5: Why Silicon on Sapphire? - pSemi

At certain width w1cut-off the FEM solver silicon on sapphire be able to get the first guided mode TE0 or TM0we record this width as the first mode cut-off width, i. Then we continue to increase the waveguide width and record the first mode effective index neff. Hewlett Packard originally used silicon on sapphire integrated circuits on their HP Voyager series calculators featuring the proprietary HP Nut processor, that are praised for their long lasting batteries.

Later calculator revisions used other processors.

Silicon-on-sapphire (SOS) waveguide modal analysis for mid-infrared applications

S a manufacturable technology. The primary application was for radiation hard circuits, but it soon became apparent that the other benefits of S.

S could lead to commercial usage. A further breakthrough was the development of ultra thin S. S films by the California Institute of technology along with Hewlett Packard in S could be commercialized for the first time in Silicon-on-Sapphire is now one of the most promising pressure sensing technologies and is gaining broader acceptance in silicon on sapphire volume applications.