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Light Transport Through Disordered Materials: Experimental and Computational Approaches
Light Transport Through Disordered Materials: Experimental and Computational Approaches
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260311091546.5
- ISBN
- 9798280716315
- DDC
- 549
- 서명/저자
- Light Transport Through Disordered Materials: Experimental and Computational Approaches / Jennifer Ann McGuire
- 발행사항
- [Sl] : Harvard University, 2025
- 형태사항
- 1 electronic resource (104 pages)
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisors: Manoharan, Vinothan Committee members: Aizenberg, Joanna; Spaepen, Frans.
- 학위논문주기
- - Ph.D. : Harvard University, 2025.
- 초록/해제
- 요약Disordered materials are abundant in our world, and they can have complex interactions with light. Understanding these interactions is important for both engineering new optical materials and for developing new methods of imaging materials. To engineer new optical materials, I use a combination of experiments and computational modeling to investigate how light moves through disordered materials that both scatter and absorb. For imaging disordered materials, I demonstrate that a fundamental understanding of how light scatters from the interface allows us to extract information from interferometric scattering imaging experiments and use that information to understand the dynamics of the system.In the first half of this thesis, I examine the interaction between absorption and scattering in disordered systems and explore how understanding this interaction can be used to tailor their optical properties. I first examine inverse photonic glasses composed of a porous polymer film with varying amounts of embedded absorber. In these systems, scattering can increase the optical path length and potentially increase absorption. I quantify absorption enhancement by comparing simulated optical properties of this system to those of a non-scattering absorbing polymer film and a layered system with spatially separated absorption and scattering. I compare the calculated absorption enhancement to the theoretical limits and to measurements of experimental systems. These comparisons allow us to propose design rules for optimizing absorption enhancement within photonic glasses. Next, I explore the optical properties of microgeode systems. Microgeodes are hollow silica shells encapsulating silicon nanowires. The multiple refractive indices and length scales within these systems in principle allow for the tailoring of optical properties across a wide spectral range. To explore how the response can be tailored, I characterize the optical properties of individual microgeodes and bulk collections of microgeodes, and I describe how the interaction of absorption and scattering of the different components affects the optical properties.In the second half of the thesis, I use interferometric scattering microscopy (iSCAT) to measure the structure and dynamics of disordered films. iSCAT is a noninvasive, label-free imaging technique that records the interference of scattered light with a reference plane wave, similar to interferometry but without the need for extensive alignment of the instrument. I show how iSCAT reveals heterogeneous dynamics of surfactants breaking down phase-separated grease films and how it can provide insights into these dynamics. Lastly, I develop an analysis technique to extract quantitative film topography from recorded iSCAT interference data, adapting both holographic reconstruction and interferometry techniques to do so.
- 언어주기
- English
- 일반주제명
- Applied physics
- 일반주제명
- Optics
- 일반주제명
- Computational physics
- 키워드
- Film dynamics
- 키워드
- Film topography
- 키워드
- Microgeodes
- 기타저자
- Harvard University Engineering and Applied Sciences - Applied Physics
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260311s2025 us eng d■001000017357798
■00520260311091546.5
■006m o d
■007cr|nu||||||||
■020 ▼a9798280716315
■040 ▼aMiAaPQD▼beng▼cMiAaPQD▼erda
■082 ▼a549
■1001 ▼aMcGuire, Jennifer Ann▼eauthor.▼0(orcid)0009-0007-4988-8943
■24510▼aLight Transport Through Disordered Materials: Experimental and Computational Approaches ▼cJennifer Ann McGuire
■260 ▼a[Sl]▼bHarvard University▼c2025
■264 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a1 electronic resource (104 pages)
■336 ▼atext▼btxt▼2rdacontent
■337 ▼acomputer▼bc▼2rdamedia
■338 ▼aonline resource▼bcr▼2rdacarrier
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisors: Manoharan, Vinothan Committee members: Aizenberg, Joanna; Spaepen, Frans.
■5021 ▼bPh.D.▼cHarvard University▼d2025.
■520 ▼aDisordered materials are abundant in our world, and they can have complex interactions with light. Understanding these interactions is important for both engineering new optical materials and for developing new methods of imaging materials. To engineer new optical materials, I use a combination of experiments and computational modeling to investigate how light moves through disordered materials that both scatter and absorb. For imaging disordered materials, I demonstrate that a fundamental understanding of how light scatters from the interface allows us to extract information from interferometric scattering imaging experiments and use that information to understand the dynamics of the system.In the first half of this thesis, I examine the interaction between absorption and scattering in disordered systems and explore how understanding this interaction can be used to tailor their optical properties. I first examine inverse photonic glasses composed of a porous polymer film with varying amounts of embedded absorber. In these systems, scattering can increase the optical path length and potentially increase absorption. I quantify absorption enhancement by comparing simulated optical properties of this system to those of a non-scattering absorbing polymer film and a layered system with spatially separated absorption and scattering. I compare the calculated absorption enhancement to the theoretical limits and to measurements of experimental systems. These comparisons allow us to propose design rules for optimizing absorption enhancement within photonic glasses. Next, I explore the optical properties of microgeode systems. Microgeodes are hollow silica shells encapsulating silicon nanowires. The multiple refractive indices and length scales within these systems in principle allow for the tailoring of optical properties across a wide spectral range. To explore how the response can be tailored, I characterize the optical properties of individual microgeodes and bulk collections of microgeodes, and I describe how the interaction of absorption and scattering of the different components affects the optical properties.In the second half of the thesis, I use interferometric scattering microscopy (iSCAT) to measure the structure and dynamics of disordered films. iSCAT is a noninvasive, label-free imaging technique that records the interference of scattered light with a reference plane wave, similar to interferometry but without the need for extensive alignment of the instrument. I show how iSCAT reveals heterogeneous dynamics of surfactants breaking down phase-separated grease films and how it can provide insights into these dynamics. Lastly, I develop an analysis technique to extract quantitative film topography from recorded iSCAT interference data, adapting both holographic reconstruction and interferometry techniques to do so.
■546 ▼aEnglish
■590 ▼aSchool code: 0084
■650 4▼aApplied physics
■650 4▼aOptics
■650 4▼aComputational physics
■653 ▼aEnhanced absorption
■653 ▼aFilm dynamics
■653 ▼aFilm topography
■653 ▼aGrease film breakdown
■653 ▼aMicrogeodes
■7102 ▼aHarvard University▼bEngineering and Applied Sciences - Applied Physics.▼edegree granting institution.
■7201 ▼aManoharan, Vinothan▼edegree supervisor.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357798▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
