| dc.contributor.author |
Rahman, Israt |
|
| dc.contributor.author |
Tisha, Zakia Tamanna |
|
| dc.contributor.author |
Gupta, Pragati |
|
| dc.date.accessioned |
2019-03-11T03:12:59Z |
|
| dc.date.available |
2019-03-11T03:12:59Z |
|
| dc.date.issued |
2017-12 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/416 |
|
| dc.description |
First of all, thanks to Almighty Allah for his blessings for the successful completion of our thesis.
Secondly, we would like to express our sincerest gratitude and appreciation to our supervisor Dr. Md. Shah Alam, Professor, Department of Electrical and Electronic Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh for the great mentorship and encouragement he has provided us throughout the year. Completing this work would have been impossible if it were not for his constant supervision and guidance. We have been extremely lucky to have a supervisor who was incredibly patient with us and responded to our queries so promptly. He aided us to develop a good understanding of the topic and encouraged us to delve further into its subject matter. We are forever indebted to him for his valuable advices and most importantly, for believing in us.
Additionally, we are grateful to all other Professors, Staff as well as students of both Bangladesh University of Engineering and Technology (BUET) and Department of Electrical Electronic and Communication Engineering (EECE) of Military Institute of Science Technology (MIST) for their co-operation during the course of our thesis work.
And last but not the least, we are thankful to our families and dear mates for their continuous support throughout the entire process. |
en_US |
| dc.description.abstract |
The unique optical and mechanical properties of nanowires have led to their widespread use as sensing devices. In this thesis, at first a study of the characteristics of silicon nanowire and silica nanowire have been presented using the full-vectorial finite element method on COMSOL Multiphysics. Description of variations of the effective indices, effective area and confinement factors alongside core radius for the fundamental mode and higher order modes for silicon nanowire and silica nanowire are presented in this work. Field distribution and power profile of both the nanowires are also shown. The silicon and silica nanowires have also been analyzed for non-linearity and group velocity dispersion. A Mach-Zehnder-based optical sensor was studied to observe optical sensing in Silica nanowire in the full-vectorial finite element method. Characteristics like propagation constant of reference arm, propagation constant difference and power fraction have been described as function of core diameters. Finally, the sensitivity of the optical sensor was studied against variations of the molar concentration for two different radii of nanowire range. |
en_US |
| dc.language.iso |
en |
en_US |
| dc.publisher |
DEPARTMENT OF ELECTRICAL, ELECTRONIC AND COMMUNICATION ENGINEERING |
en_US |
| dc.title |
Modeling of Silicon and Silica Nanowires for Optical Sensing |
en_US |
| dc.type |
Thesis |
en_US |
