Light Management in Optoelectronic Devices with Disordered and Chaotic Structures

Handle URI:
http://hdl.handle.net/10754/235351
Title:
Light Management in Optoelectronic Devices with Disordered and Chaotic Structures
Authors:
Khan, Yasser
Abstract:
With experimental realization, energy harvesting capabilities of chaotic microstructures were explored. Incident photons falling into chaotic trajectories resulted in energy buildup for certain frequencies. As a consequence, many fold enhancement in light trapping was observed. These ellipsoid like chaotic microstructures demonstrated 25% enhancement in light trapping at 450nm excitation and 15% enhancement at 550nm excitation. Optimization of these structures can drive novel chaos-assisted energy harvesting systems. In subsequent sections of the thesis, prospect of broadband light extraction from white light emitting diodes were investigated, which is an unchallenged but quintessential problem in solid-state lighting. Size dependent scattering allows microstructures to interact strongly with narrow-band light. If disorder is introduced in spread and sizes of microstructures, broadband light extraction is possible. A novel scheme with Voronoi tessellation to quantify disorder in physical systems was also introduced, and a link between voronoi disorder and state disorder of statistical mechanics was established. Overall, in this thesis some nascent concepts regarding disorder and chaos were investigated to efficiently manage electromagnetic waves in optoelectronic devices.
Advisors:
Ooi, Boon S. ( 0000-0001-9606-5578 ) ; Fratalocchi, Andrea
Committee Member:
Al Sunaidi, Mohammad
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Program:
Electrical Engineering
Issue Date:
Jul-2012
Type:
Thesis
Appears in Collections:
Theses; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.advisorOoi, Boon S.en
dc.contributor.advisorFratalocchi, Andreaen
dc.contributor.authorKhan, Yasseren
dc.date.accessioned2012-07-24T07:09:48Z-
dc.date.available2012-07-24T07:09:48Z-
dc.date.issued2012-07en
dc.identifier.urihttp://hdl.handle.net/10754/235351en
dc.description.abstractWith experimental realization, energy harvesting capabilities of chaotic microstructures were explored. Incident photons falling into chaotic trajectories resulted in energy buildup for certain frequencies. As a consequence, many fold enhancement in light trapping was observed. These ellipsoid like chaotic microstructures demonstrated 25% enhancement in light trapping at 450nm excitation and 15% enhancement at 550nm excitation. Optimization of these structures can drive novel chaos-assisted energy harvesting systems. In subsequent sections of the thesis, prospect of broadband light extraction from white light emitting diodes were investigated, which is an unchallenged but quintessential problem in solid-state lighting. Size dependent scattering allows microstructures to interact strongly with narrow-band light. If disorder is introduced in spread and sizes of microstructures, broadband light extraction is possible. A novel scheme with Voronoi tessellation to quantify disorder in physical systems was also introduced, and a link between voronoi disorder and state disorder of statistical mechanics was established. Overall, in this thesis some nascent concepts regarding disorder and chaos were investigated to efficiently manage electromagnetic waves in optoelectronic devices.en
dc.language.isoenen
dc.subjectLight extractionen
dc.subjectLight trappingen
dc.subjectQuantifying disorderen
dc.subjectSolid-state lightingen
dc.subjectEnergy harvestingen
dc.subjectMicroscopic Chaosen
dc.titleLight Management in Optoelectronic Devices with Disordered and Chaotic Structuresen
dc.typeThesisen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
thesis.degree.grantorKing Abdullah University of Science and Technologyen_GB
dc.contributor.committeememberAl Sunaidi, Mohammaden
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.nameMaster of Scienceen
dc.person.id113255en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.