{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/79904"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/79904","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"Optical Beam Shaping by Linear and Nonlinear Metasurfaces","abstract":"Ph.D.","abstract_html":"Ph.D.","abstract_has_math":false,"creators":["Xu, Yun"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Litchinitser, Natalia","Electrical Engineering"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-07-30T15:10:54Z","date_published":"2019-07-30T15:10:54Z","updated_at":"2026-07-27T19:05:19Z","subjects":["engineering"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/79904","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Litchinitser, Natalia","Electrical Engineering"]},{"key":"dc:creator","label":"Author","values":["Xu, Yun"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2019-07-30T15:10:54Z","2019","2019-05-08 17:36:51"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:type","label":"Dc Type","values":["Text","Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/79904"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Ph.D.","Beams possessing helical wavefronts and intensity singularities carry an orbital angular momentum (OAM). Conventionally, the helical wavefront of the OAM beam is generated using spiral phase plates (SPPs) or spatial light modulators (SLMs). In the past decade, planar optical components based on liquid crystal technology (q-plate) and optical metasurfaces (MSs) have been studied to realize wavefront manipulation on the microscale. In this dissertation we focus on MSs, whose properties can be engineered on the nanoscale to manipulate wavefronts. Metasurfaces are a subclass of metamaterials (MMs) engineered materials with electromagnetic properties that cannot be found in nature, opened a new avenue to ultra-compact, reconfigurable optical components that can be integrated on a chip. While MMs’ performance is often limited by several challenges, including significant losses, limited bandwidth, and complex 3-dimensional fabrication and integration, heir 2-dimensional counterparts, opticalMSs, have been shown to provide control of both amplitude and phase on the nanoscale and simultaneously they overcome the limitations of MMs. However, compared to SLMs, to date, a majority of MSs lack reconfigurability, which means once a MS is designed and fabricated, the functionality is fixed. Two main contributions of this dissertation are as follows, first, we proposed and demonstrated a new approach to characterization of light beam transmission through complex MSs using the OAM beams. Second, we demonstrated nonlinear optical MSs enabling intentity dependent beam shaping.The layout of this dissertation is as following: In Chapter I, I will briefly review background and existing work related to this dissertation: (1) Applications of OAM beams and conventional methods to generate the OAM (2) Wavefront manipulation with different types of MSs (3) Reconfigurable MSs for intensity-dependentstructured light generation. Chapter II will discuss optical vortex interferometry that can be used to characterize the characteristics of light beams transmitted through optical Mss. MSs samples were fabricated to demonstrate the proposed method. Chapter III, Chapter IV and Chapter V will focus on beam shaping using nonlinear MSs. In Chapter III, optical properties of clacogenide glasses possessing large nonlinearity and good figure of merit (FOM) will be introduced. Experimental methods used to characterize nonlinear coefficient will be described in details. Chapter IV and Chapter V will present two designs of nonlinear MSs enabling controllable OAM properties of output beam determined by the intensity of input beam."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Optical Beam Shaping by Linear and Nonlinear Metasurfaces"]}]}],"canonical_facts":{"dc:contributor":["Litchinitser, Natalia","Electrical Engineering"],"dc:creator":["Xu, Yun"],"dc:date":["2019-07-30T15:10:54Z","2019","2019-05-08 17:36:51"],"dc:description":["Ph.D.","Beams possessing helical wavefronts and intensity singularities carry an orbital angular momentum (OAM). Conventionally, the helical wavefront of the OAM beam is generated using spiral phase plates (SPPs) or spatial light modulators (SLMs). In the past decade, planar optical components based on liquid crystal technology (q-plate) and optical metasurfaces (MSs) have been studied to realize wavefront manipulation on the microscale. In this dissertation we focus on MSs, whose properties can be engineered on the nanoscale to manipulate wavefronts. Metasurfaces are a subclass of metamaterials (MMs) engineered materials with electromagnetic properties that cannot be found in nature, opened a new avenue to ultra-compact, reconfigurable optical components that can be integrated on a chip. While MMs’ performance is often limited by several challenges, including significant losses, limited bandwidth, and complex 3-dimensional fabrication and integration, heir 2-dimensional counterparts, opticalMSs, have been shown to provide control of both amplitude and phase on the nanoscale and simultaneously they overcome the limitations of MMs. However, compared to SLMs, to date, a majority of MSs lack reconfigurability, which means once a MS is designed and fabricated, the functionality is fixed. Two main contributions of this dissertation are as follows, first, we proposed and demonstrated a new approach to characterization of light beam transmission through complex MSs using the OAM beams. Second, we demonstrated nonlinear optical MSs enabling intentity dependent beam shaping.The layout of this dissertation is as following: In Chapter I, I will briefly review background and existing work related to this dissertation: (1) Applications of OAM beams and conventional methods to generate the OAM (2) Wavefront manipulation with different types of MSs (3) Reconfigurable MSs for intensity-dependentstructured light generation. Chapter II will discuss optical vortex interferometry that can be used to characterize the characteristics of light beams transmitted through optical Mss. MSs samples were fabricated to demonstrate the proposed method. Chapter III, Chapter IV and Chapter V will focus on beam shaping using nonlinear MSs. In Chapter III, optical properties of clacogenide glasses possessing large nonlinearity and good figure of merit (FOM) will be introduced. Experimental methods used to characterize nonlinear coefficient will be described in details. Chapter IV and Chapter V will present two designs of nonlinear MSs enabling controllable OAM properties of output beam determined by the intensity of input beam."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/79904"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["engineering"],"dc:title":["Optical Beam Shaping by Linear and Nonlinear Metasurfaces"],"dc:type":["Text","Dissertation"]},"updated_at":"2026-07-27T19:05:19Z"}