Zobrazeno 1 - 10
of 519
pro vyhledávání: '"Ann Roberts"'
Autor:
Michele Cotrufo, Shaban B. Sulejman, Lukas Wesemann, Md. Ataur Rahman, Madhu Bhaskaran, Ann Roberts, Andrea Alù
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024)
Abstract Optical metasurfaces have enabled analog computing and image processing within sub-wavelength footprints, and with reduced power consumption and faster speeds. While various image processing metasurfaces have been demonstrated, most of the c
Externí odkaz:
https://doaj.org/article/08fd2b62bb454eefadc4160ba93851ff
Autor:
Shaban B. Sulejman, Niken Priscilla, Lukas Wesemann, Wendy S. L. Lee, Jieqiong Lou, Elizabeth Hinde, Timothy J. Davis, Ann Roberts
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-9 (2023)
Abstract Many image processing operations involve the modification of the spatial frequency content of images. Here we demonstrate object-plane spatial frequency filtering utilizing the angular sensitivity of a commercial spectral bandstop filter. Th
Externí odkaz:
https://doaj.org/article/104d7a92d98a46a88d36bd2d2036b62a
Autor:
Laura Ospina-Rozo, Niken Priscilla, James A. Hutchison, Allison van de Meene, Nicholas W. Roberts, Devi Stuart-Fox, Ann Roberts
Publikováno v:
Materials Today Advances, Vol 18, Iss , Pp 100363- (2023)
Beetle elytra (hardened forewings) are a promising source of inspiration to develop or enhance the performance of human-fabricated composite materials. The structures responsible for optical properties in the ultra-violet to visible spectrum (300–7
Externí odkaz:
https://doaj.org/article/e37bacd439b941f5899a80ac2c6ba1b3
Autor:
Chung Kim Nguyen, Aishani Mazumder, Edwin LH Mayes, Vaishnavi Krishnamurthi, Ali Zavabeti, Billy J. Murdoch, Xiangyang Guo, Patjaree Aukarasereenont, Aditya Dubey, Azmira Jannat, Xiaotian Wei, Vi Khanh Truong, Lei Bao, Ann Roberts, Chris F. McConville, Sumeet Walia, Nitu Syed, Torben Daeneke
Publikováno v:
Advanced Materials Interfaces, Vol 10, Iss 9, Pp n/a-n/a (2023)
Abstract Thin film transistors (TFTs) are key components for the fabrication of electronic and optoelectronic devices, resulting in a push for the wider exploration of semiconducting materials and cost‐effective synthesis processes. In this report,
Externí odkaz:
https://doaj.org/article/fced80d929b8447297285ddc00382831
Autor:
Lukas Wesemann, Jon Rickett, Jingchao Song, Jieqiong Lou, Elizabeth Hinde, Timothy J. Davis, Ann Roberts
Publikováno v:
Light: Science & Applications, Vol 10, Iss 1, Pp 1-6 (2021)
Abstract The ability to visualise transparent objects such as live cells is central to understanding biological processes. Here we experimentally demonstrate a novel nanostructured coverslip that converts phase information to high-contrast intensity
Externí odkaz:
https://doaj.org/article/1c6c992733834e2a93cf2f722318c1e8
Autor:
Niken Priscilla, Dan Smith, Enrico Della Gaspera, Jingchao Song, Lukas Wesemann, Timothy James, Ann Roberts
Publikováno v:
Advanced Photonics Research, Vol 3, Iss 5, Pp n/a-n/a (2022)
Plasmonic and other nanoparticles have attracted considerable interest for their role in structural coloration. The optical “Janus” effect, where the color of light reflected from a partially transmitting film depends on whether the device is vie
Externí odkaz:
https://doaj.org/article/a449d9c659e44e9cb948453a62d116d7
Autor:
Kalpana Singh, Evgeniy Panchenko, Babak Nasr, Amelia Liu, Lukas Wesemann, Timothy J. Davis, Ann Roberts
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 9, Iss 1, Pp 1491-1500 (2018)
Here we present the results of an investigation of resonances of azimuthal trimer arrangements of rectangular slots in a gold film on a glass substrate using cathodoluminescence (CL) as a probe. The variation in the CL signal collected from specific
Externí odkaz:
https://doaj.org/article/90b084cbab4b42779a481c010e25a6a5
Autor:
Lukas Wesemann, Evgeniy Panchenko, Kalpana Singh, Enrico Della Gaspera, Daniel E. Gómez, Timothy J. Davis, Ann Roberts
Publikováno v:
APL Photonics, Vol 4, Iss 10, Pp 100801-100801-6 (2019)
Spatial frequency filtering is a fundamental enabler of information processing methods in biological and technical imaging. Most filtering methods, however, require either bulky and expensive optical equipment or some degree of computational processi
Externí odkaz:
https://doaj.org/article/7f47bc8a091f4b8e8b19ef87c39b5be0
Autor:
Stuart K. Earl, Timothy D. James, Daniel E. Gómez, Robert E. Marvel, Richard F. Haglund Jr., Ann Roberts
Publikováno v:
APL Photonics, Vol 2, Iss 1, Pp 016103-016103-8 (2017)
A metasurface comprising an array of silver nanorods supported by a thin film of the phase change material vanadium dioxide is used to rotate the primary polarization axis of visible light at a pre-determined wavelength. The dimensions of the rods we
Externí odkaz:
https://doaj.org/article/33147700c5f1447eacee3b771765100a
Autor:
Xiao Ming Goh, Shan Shan Kou, Betty P. Kouskousis, Nicoleta M. Dragomir, Stephen F. Collins, Greg W. Baxter, Ann Roberts
Publikováno v:
IEEE Photonics Journal, Vol 6, Iss 5, Pp 1-7 (2014)
Here, we demonstrate a non-destructive quantitative phase imaging method, in conjunction with tomographic reconstruction techniques, to reconstruct the three-dimensional refractive index distribution of a fiber Bragg grating. In addition to being abl
Externí odkaz:
https://doaj.org/article/4145d765723f47d3b76abee8d5a382c6