Modeling And Characteriztion Of A Ring Resonator Based Silicon Photonic Sensor On Silicon On Insulator Soi
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Modeling And Characteriztion Of A Ring Resonator Based Silicon Photonic Sensor On Silicon On Insulator Soi
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Author : Gwangho Choi
language : en
Publisher:
Release Date : 2019
Modeling And Characteriztion Of A Ring Resonator Based Silicon Photonic Sensor On Silicon On Insulator Soi written by Gwangho Choi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Optical engineering categories.
The purpose of this work is to build silicon photonic devices and verify their functionalities. In particular, the structure of a ring resonator (RR) is analyzed and applied to various silicon photonic application in sensing. Silicon waveguides, grating couplers, directional couplers, and RRs are fabricated on the silicon-on-insulator (SOI) wafer. Geometrical parameters and optical properties of the silicon devices are studied and also applied to the design of the aforementioned devices. The waveguide dimensions and, optical properties of the silicon waveguide such as dispersion and effective-index are examined. The RRs are made of a series of straight and bent waveguides which are analyzed as a function of their geometrical variables such as path length of ring resonator and the gap between the bus and the bent waveguide forming the RR. Device fabrication is done in collaboration with the University of Minnesota where the Electron-beam lithography is performed. Finally, the devices are tested, and their performance is characterized. The average measured channel spacing between four channels of an integrated wavelength-division multiplexer is 1.825 +/- 0.01 nm. The experimental errors and their corresponding factors are discussed in details since the measured data reveal the devices performed inefficiently when compared to the simulations and theoretical predictions.
Modeling And Characterization Of Strongly Coupled Silicon On Insulator Nanophotonic Devices
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Author : Michael Lawrence Cooper
language : en
Publisher:
Release Date : 2010
Modeling And Characterization Of Strongly Coupled Silicon On Insulator Nanophotonic Devices written by Michael Lawrence Cooper and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Silicon photonics is technologically attractive because of the possibility of monolithically integrating multi-element photonic waveguide circuits with complex electronic circuits. To reduce the footprint of the photonic components, it is possible to fabricate strongly-coupled waveguides and resonators, e.g., with sub-100 nm separation gaps. The most insightful design tool used for photonic devices, coupled mode theory (CMT), is considered suspect for high-index contrast strongly coupled waveguides. Using a numerically assisted coupled mode theory (NA-CMT) developed for arrayed waveguides, it was shown how one may modify the basis parameters within CMT to calculate more accurate modal profiles and more accurate estimates of the value and the wavelength dependency (i.e., dispersion) of coupling coefficients. Traditional CMT inaccurately predicts both the field peak locations and the exponential decay rates of the field envelopes in the cladding regions. Examples of strongly-coupled silicon photonic devices based on waveguides and couplers include giant birefringence multi-slot waveguides, and large-bandwidth coupled-resonator optical waveguides (CROWS) consisting of several hundred coupled silicon microring resonators. Numerical techniques will be reported for accurately simulating the transmission properties of strongly coupled arrayed waveguides and disordered CROWs in excellent agreement with experimental measurements on fabricated devices. Experimental methods were developed for the accurate measurement of transmitted intensity and group delay of silicon nanophotonic waveguides and multi-resonator circuits including CROWs and side-coupled integrated spaced sequence of resonators (SCISSORS). The role of external amplification in reliably measuring waveguide transmission using the method of swept wavelength interferometry was studied in detail. Also, a technique of swept-wavelength infrared imaging was developed and applied for quantitative diagnostics of multi-resonator circuits which need not have accessible drop ports on every device.
Modeling Characterization Of
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Author : Zhaohui Wu
language : en
Publisher: Open Dissertation Press
Release Date : 2017-01-27
Modeling Characterization Of written by Zhaohui Wu and has been published by Open Dissertation Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-27 with Technology & Engineering categories.
This dissertation, "Modeling and Characterization of High-temperature Silicon-based Thermal Sensors" by Zhaohui, Wu, 吳朝暉, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled MODELING AND CHARACTERIZATION OF HIGH-TEMPERATURE SILICON-BASED THERMAL SENSORS submitted by Zhaohui Wu for the degree of Doctor of Philosophy at the University of Hong Kong in December 2004 Owing to the minority-carrier exclusion effect, the maximum working temperature T of silicon-based thermal sensors can be raised to 600 C. In this max research, models based on this effect are developed to explain the operating principle of high-temperature silicon-based thermal sensors. Substrates including bulk Si, thick-film silicon-on-insulator (SOI), thin-film SOI, solid-phase crystallization (SPC) polysilicon-on-insulator (POI) and metal-induced lateral-crystallization (MILC) POI are considered. One-dimensional and two-dimensional models are also proposed for rectangular and circular sensors respectively. The theory of minority-carrier exclusion effect is first introduced and investigated by a semiconductor-device simulator. Study shows that this effect can increase the T of the sensors by removing thermally generated charge carriers. In max order to obtain a higher T, a higher current density is needed to provide a stronger max i exclusion effect. This can be achieved by either increasing the operating current or reducing the silicon-film thickness of the sensor. A one-dimensional model is next developed to include the minority-carrier exclusion effect for the rectangular thermal sensors built on bulk Si, thick-film SOI and thin-film SOI, while a two-dimensional model is proposed for the circular sensors. Approximate carrier-mobility models are used to simplify the calculation of the resistance vs temperature characteristics of the sensors, and a two-step integration method is adopted to improve the accuracy of the model. The effects of minority-carrier lifetime and self-heating on the models are also considered. One-dimensional and two-dimensional models for thermal sensors built on SPC and MILC polysilicon films are next developed, based on the grain-boundary trapping theory. Based on these models, the effects of film doping concentration and grain size on the minority-carrier exclusion and electrical conduction of the thermal sensors are discussed. Finally, experiments are performed and compared with the models. Results show that the measured data qualitatively agree with the modeling results. In conclusion, the models developed in this research can be used to explain the operating principles of different high-temperature silicon-based thermal sensors, and hence guide the design of their structures. An abstract of exactly 326 words ii DOI: 10.5353/th_b3105765 Subjects: Silicon diodes - Design and construction
Modeling And Simulation Of Silicon Photonics Based Optical Ring Resonator Biosensor
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Author : Liaquat Ali
language : en
Publisher:
Release Date : 2021
Modeling And Simulation Of Silicon Photonics Based Optical Ring Resonator Biosensor written by Liaquat Ali and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Biosensors categories.
In the photonic technological platforms, the signal is carried by light rather than an electron as in conventional electronic technologies. Electronic processing of the signals is becoming restricted, particularly in the multi-GHz frequency range, due to the parasitic effects of the copper wires and other limitations of the materials used in micro and nanoelectronics domains. On the other hand, photonic technology can offer data transmission at the THz range. To harness the power of photonic technology, silicon-photonics would be a very effective platform because these devices use silicon as the optical medium that can be fabricated using the standard CMOS technology. A biosensor is an analytical device used for the identification of an analyte that conglomerates a vital element with a physicochemical indicator. Optical biosensors are comprised of a light source, light guiding medium, and photodetector. In recent decades, optical ring resonators gained importance as one of the promising biosensors due to miniaturized size and fast response. The optical ring resonator identifies the intended molecules or biochemical molecules by assessing the change in light behavior and that change in light behavior occurs due to the interactivity of the evanescent field of the resonating light with biosamples such as blood, serum, salvia, bacteria, protein or DNA traits present on the surface of the ring resonator. One of the most leading causes of death in modern times is different types of cancer. American Cancer Society in their recent report, states that in more than 50% of death by cancer, cancer has been diagnosed at the last stage. The core target of this thesis is to outline a silicon photonics biosensor based on an optical ring resonator for the identification of cancer and other diseases.
The Iot Physical Layer
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Author : Ibrahim (Abe) M. Elfadel
language : en
Publisher: Springer
Release Date : 2018-09-03
The Iot Physical Layer written by Ibrahim (Abe) M. Elfadel and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-03 with Technology & Engineering categories.
This book documents some of the most recent advances on the physical layer of the Internet of Things (IoT), including sensors, circuits, and systems. The application area selected for illustrating these advances is that of autonomous, wearable systems for real-time medical diagnosis. The book is unique in that it adopts a holistic view of such systems and includes not only the sensor and processing subsystems, but also the power, communication, and security subsystems. Particular attention is paid to the integration of these IoT subsystems as well as the prototyping platforms needed for achieving such integration. Other unique features include the discussion of energy-harvesting subsystems to achieve full energy autonomy and the consideration of hardware security as a requirement for the integrity of the IoT physical layer. One unifying thread of the various designs considered in this book is that they have all been fabricated and tested in an advanced, low-power CMOS process, namely GLOBALFOUNDRIES 65nm CMOS LPe.
Micro Ring Resonators In Silicon On Insulator
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Author : Antonio Samarelli
language : en
Publisher:
Release Date : 2011
Micro Ring Resonators In Silicon On Insulator written by Antonio Samarelli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Nanostructured materials categories.
Thermally Controllable Microring Resonator Based Silicon Photonic Switch
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Author : Han-Yong Ng
language : en
Publisher:
Release Date : 2007
Thermally Controllable Microring Resonator Based Silicon Photonic Switch written by Han-Yong Ng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
A 4 x 4 photonic switch matrix was designed, fabricated and characterized. The photonic switch matrix was based on microring resonator (MR) and was fabricated on relatively low-cost silicon-on-insulator (SOI). Independent wavelength channel switching was accomplished by thermo-optic tuning of the MRs through highly localized resistive micro-heaters. The device was fabricated using the relatively mature silicon fabrication technology. Waveguide patterns were defined with high definition eBeam lithography, etching was done in a reactive-ion etching chamber, and the top cladding SiO2 layer was deposited through plasma-enhanced chemical vapor deposition. Finally, resistive Nichrome micro-heaters were deposited locally directly above each MR to offer the dynamic tuning capability. The strong optical confinement offered by the high index contrast between silicon and SiO2 makes it possible to fabricate micrometer-sized MRs with acceptable optical power loss caused by the small bending radii. The MRs were designed with a uniform diameter of 10 aem to support a wide free spectral range. All waveguides have a design dimension of 450 nm x 250 nm to allow operation exclusively in the fundamental mode at the 1.55 aem wavelength. A FSR of 18 nm with a spectral linewidth of 0.1 nm were observed for the fabricated MRs offering high wavelength selectivity. The device exhibits virtually no thermal crosstalk between adjacent channels, showing no output peak wavelength shift at 0.01 nm wavelength measurement precision by thermally tuning an adjacent MR with electric current as high as 7 mA, which is equivalent to about 2.5 nm in resonance wavelength tuning. The device showed a tuning delay time of about 1 ms. The overall bare chip size of the device is 20 mm x 4 mm. We demonstrated through this work a wavelength selective photonic switch device using low-cost SOI technology that is compact and easy to fabricate. It shows high potential for further development into high port-count photonic switch matrix.
Handbook Of Optofluidics
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Author : Aaron R. Hawkins
language : en
Publisher: CRC Press
Release Date : 2010-03-19
Handbook Of Optofluidics written by Aaron R. Hawkins and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-19 with Science categories.
Optofluidics is an emerging field that involves the use of fluids to modify optical properties and the use of optical devices to detect flowing media. Ultimately, its value is highly dependent on the successful integration of photonic integrated circuits with microfluidic or nanofluidic systems. Handbook of Optofluidics provides a snapshot of the s
Ring Resonator Photonic Sensing Device
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Author : Andrew Llewellyn Evans
language : en
Publisher:
Release Date : 2015
Ring Resonator Photonic Sensing Device written by Andrew Llewellyn Evans and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
This thesis studies a micro ring resonator sensor structure built using the silicon-on-insulator (SOI) platform. The sensor detects changes in index of refraction with a sensitivity of 21 nm/RIU (RIU stands for refractive index unit), in close agreement to the predicted sensitivity, from computer simulations, of 24.4 nm/RIU. A study of thermal effects and residue layers was performed and a future sensor design capable of measuring layer thickness during evaporation is proposed. Background material relevant to the modelling of passive optical devices and a general overview of sensor design is presented. The sensitivity of various waveguide structures to changes in cover index of refraction are studied using computer simulations. The change in free spectral range (FSR) of the resonator sensor was characterized and was used to extend the active range of the device.
Advances In Photonic Crystals And Devices
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Author : Narendra Kumar
language : en
Publisher: CRC Press
Release Date : 2019-09-06
Advances In Photonic Crystals And Devices written by Narendra Kumar and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-06 with Science categories.
In recent decades, there has been a phenomenal growth in the field of photonic crystal research and has emerged as an interdisciplinary area. Photonic crystals are usually nanostructured electromagnetic media consisting of periodic variation of dielectric constant, which prohibit certain electromagnetic wave frequency ranges called photonic bandgaps to propagate through them. Photonic crystals elicited numerous interesting features by unprecedented control of light and their exploitation is a promising tool in nanophotonics and designing optical components. The book ‘Advances in Photonic Crystals and Devices’ is designed with 15 chapters with introductory as well as research and application based contents. It covers the following highlighted features: Basics of photonic crystals and photonic crystal fibers Different theoretical as well as experimental approaches Current research advances from around the globe Nonlinear optics and super-continuum generation in photonic crystal fibers Magnetized cold plasma photonic crystals Liquid crystal defect embedded with graphene layers Biophysics and biomedical applications as optical sensors Two-dimensional photonic crystal demultiplexer Optical logic gates using photonic crystals A large number of references The goal of this book is to draw the background in understanding, fabrication and characterization of photonic crystals using a variety of materials and their applications in design of several optical devices. Though the book is useful as a reference for the researchers working in the area of photonics, optical computing and fabrication of nanophotonic devices, it is intended for the beginners like students pursuing their masters’ degree in photonics.