장소 | E6 1323 |
---|---|
일시 | 4pm, 14th April |
연사 | 신승우 (KAIST 물리학과) |
Title: Holographic tomography of dielectric tensors at optical frequency
Speaker: 신승우 (KAIST 물리학과)
Date: 4pm, 14th April
Place: E6 1323 (Available seats can be limited because of the COVID situation.)
Abstract
Ranging from material science to soft matter physics, liquid-crystal displays, and tissue biology, three-dimensional (3D) optically anisotropic structures have been investigated for versatile purposes in various research areas. However, conventional methods indirectly access information of 3D anisotropic structure, due to the lack of direct imaging modality for 3D anisotropy.
Optical diffraction tomography (ODT) techniques have been successfully demonstrated in reconstructing 3D refractive index (RI) distribution for various research areas. However, applications of the techniques have been restricted to optically isotropic objects, due to the scalar wave assumption in the ODT principles. This assumption severely limits broader applications of the ODT techniques to optically anisotropic objects, particularly for liquid crystalline materials and filament structures in biological cells.
Here, we present dielectric tensor tomography as a label-free modality for reconstructing 3D dielectric tensors of anisotropic structures. Dielectric tensor, a physical descriptor for vectorial light-matter interaction, serves intrinsic information of optical anisotropy including principal refractive indices and optic axes. By measuring diffracted electric fields and inversely solving a vectorial wave equation, the present method offers 3D distributions of dielectric tensors, principal RIs, and optic axes of anisotropic structures. The feasibility of the present method is validated by numerical simulations and experimental results. We demonstrate quantitative tomographic measurements of various nematic liquid-crystal structures and their fast 3D nonequilibrium dynamics.
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
118 | November 28 (Thu.), 16:00 PM | #1323, E6-2 | Prof. Kyung Taec Kim |
Generation of coherent EUV emissions using ultrashort laser pulses
![]() |
117 | Apr. 19(Tue.), 2PM | #1323(E6-2. 1st fl.) | Prof. Mark Koepke, Department of Physics and Astronomy, West Virginia University, USA | Nonlocal collisional electron transport in partially ionized plasma generation, structure, and stability |
116 | Apr. 9 (Fri.), 10:00 AM | Zoom webinar | Prof. Marko Loncar (Harvard University, USA) |
Integrated Lithium Niobate Photonics
![]() |
115 | 2018년 9월 7일 (금), 3PM | 학술문화관 (E9), 2층 양승택 오디토리움 | Prof. Martin Head-Gordon, UC Berkeley |
Recent developments in density functional theory: From new functionals to the nature of the chemical bond
![]() |
114 | Nov. 10th(Thu) 4 p.m. | E6-2. #1323(1st fl.) | Prof. Min Seok Jang, Electrical Engineering, KAIST | Low Dimensional Active Plasmonics and Electron Optics in Graphene |
113 | 2015/06/03, 12PM | Room 101, E11 | Prof. Min-Kyo, Seo & Hansuek, Lee(KAIST) |
The First Wednesday Multidisciplinary Forum
![]() |
112 | June 4 (Tue.), 5:00 PM | #1323, E6-2 | Prof. Minsu Kim |
Stochastic nature of bacterial eradication using antibiotics
![]() |
111 | DEC. 27 (Thu), 04:00 PM | E6-2. 1st fl. #1323 | Prof. Na Young Kim |
Quantum Innovation (QuIN) Laboratory
![]() |
110 | October 17 (Thu.), 16:00 PM | #1323, E6-2 | Prof. Namkyoo Park |
Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing
![]() |
109 | August. 14th (Wed.), 4:00PM, | Rm. 1323, E6 | Prof. Nicolas Treps |
Quantum Optics, at the heart of quantum metrology and quantum information
![]() |
108 | Aug. 16 (Wed.), 4 PM | #1322 (E6-2. 1st fl.) | Prof. Noejung Park (UNIST) |
Phonon-driven spin-Floquet valleytro-magnetism
![]() |
107 | October 15 (Tue.), 16:00 PM | #1323, E6-2 | Prof. Pilkyung Moon |
Moiré superlattices and graphene quasicrystal
![]() |
106 | Nov 17th 12:00 PM | Online(Zoom) | Prof. Qiang Lin (Univ. of Rochester, USA) |
Quantum- & Nano-Photonics" 세미나 시리즈
![]() |
105 | December 2(Wed), 10:00AM | Zoom | Prof. Rakshya Katiwada (Illinois Institute of Technology) |
Recent progress in Axion Dark Matter eXperiment (ADMX) technology
![]() |
104 | 4월 18일(월), 15:30~ | KI빌딩(E4), 강의실 B501 (5F) | Prof. Robert A. DiStasio Jr. (Cornell University) |
First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism
![]() |
103 | 2018. 6. 22 10:00am ~ 11:50am | E6-6, Lecture Room 119 (1F) | Prof. Sang Bok Lee, Dept. of Chemistry and Biochemistry, Univ. of Maryland |
Success in Research Career
![]() |
102 | NOV. 23 (Fri), 03:00 PM | E6-2. 2st fl. #2501 | Prof. Sang-Jin Sin |
Entanglement string and Spin Liquid with Holographic duality
![]() |
101 | Feb. 2(Tue) 2:30 PM | Zoom | Prof. Sangsik Kim (Texas Tech University, USA) |
Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems)
![]() |
100 | October 29 (Tue.), 10:00am | #1323 (E6-2, 1st fl.) | Prof. Se Kwon Kim |
Unconventional Spin Transport in Quantum Materials
![]() |
99 | April 08(Fri.) 11:00 | E6-1 #1323 | Prof. Se-Young Jeong (Optics and Mechatronics Engineering , Pusan National University) |
(응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film
![]() |