Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Ramachandram, Badugu"'
Publikováno v:
Chemosensors, Vol 11, Iss 8, p 463 (2023)
In this paper, a method is described to perform ion concentration measurements on both sides of an inserted contact lens, without physical contact with the eye or the contact lens. The outer surface of an eye is covered with a tear film that has mult
Externí odkaz:
https://doaj.org/article/fef34b11b7d54bbaa1943fa3b638f454
Autor:
Ruxue Wang, Hongyan Xia, Douguo Zhang, Junxue Chen, Liangfu Zhu, Yong Wang, Erchan Yang, Tianyang Zang, Xiaolei Wen, Gang Zou, Pei Wang, Hai Ming, Ramachandram Badugu, Joseph R. Lakowicz
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-10 (2017)
Typically nanofibres need to be placed on solid substrates for the next generation of devices, but this prevents light guiding. Here Wanget al. numerically and experimentally demonstrate that when a nanofibre is placed on a dielectric multilayer, it
Externí odkaz:
https://doaj.org/article/b99361545e7546b2802e574f120b2888
Autor:
Yifeng Xiang, Junxue Chen, Douguo Zhang, Ruxue Wang, Yan Kuai, Fengya Lu, Xi Tang, Pei Wang, Hai Ming, Mary Rosenfeld, Ramachandram Badugu, Joseph R. Lakowicz
Publikováno v:
Applied Sciences, Vol 8, Iss 1, p 144 (2018)
Experiments and numerical simulations demonstrate that when a silver nanowire is placed on a dielectric multilayer, but not the commonly used bare glass slide, the effective refractive index of the propagating surface plasmons along the silver nanowi
Externí odkaz:
https://doaj.org/article/89b66949f5e64163a6214d2ef0cdaee2
Publikováno v:
J Phys Chem C Nanomater Interfaces
Multilayer structures with two dielectrics having different optical constants and no structural features in the x-y plane can display photonic band gaps (PBGs) and are called one-dimensional photonic crystals (1DPCs). If the top layer thickness is ca
Autor:
Joseph R. Lakowicz, Emilano Descrovi, Yifeng Xiang, Sharmistha Dutta Choudhury, Douguo Zhang, Ramachandram Badugu
Publikováno v:
J Opt
The coupling of fluorescence with surface electromagnetic modes, such as surface plasmons on thin metal films or Bloch surface waves (BSWs) on truncated one-dimensional photonic crystals (1DPCs), are presently utilized for many fluorescence-based app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ab69e295f72ac04ad8c500dac54ef7b
https://europepmc.org/articles/PMC8082491/
https://europepmc.org/articles/PMC8082491/
Publikováno v:
Sens Actuators B Chem
The ability to measure all the electrolyte concentrations in tears would be valuable in ophthalmology for research and diagnosis of dry eye disease (DED) and other ocular pathologies. However, tear samples are difficult to collect and analyze because
Publikováno v:
Anal Biochem
Rapid and non-invasive measurement of hydration status is medically important because even mild levels of dehydration can have a significant impact on physical and cognitive performance. Despite the potential value of determining whole-body hydration
Autor:
Douguo Zhang, Xu Liu, Joseph R. Lakowicz, Hai Ming, Yingke Xu, Pei Wang, Yifeng Xiang, Yan Kuai, Ramachandram Badugu, Ruxue Wang, Cuifang Kuang
Publikováno v:
ACS Nano. 11:10446-10451
The use of a single silver nanowire as a flexible coupler to transform a free space beam into a Bloch surface wave propagating on a dielectric multilayer is proposed. Based on Huygens ‘Principle, when a Gaussian beam is focused onto a straight silv
Autor:
Douguo Zhang, Ruxue Wang, Emiliano Descrovi, Liangfu Zhu, Joseph R. Lakowicz, Ramachandram Badugu
Publikováno v:
Analytical Biochemistry. 531:20-36
Fluorescence spectroscopy and imaging are now used throughout the biosciences. Fluorescence microscopes, spectrofluorometers, microwell plate readers and microarray imagers all use multiple optical components to collect, redirect and focus the emissi
Autor:
Joseph R. Lakowicz, Liangfu Zhu, Douguo Zhang, Pei Wang, Shan Shan Kou, Hai Ming, Xiaocong Yuan, Mary Rosenfeld, Yong Wang, Luping Du, Ramachandram Badugu, Ruxue Wang, Guangyuan Si, Jiao Lin
Publikováno v:
ACS Nano. 11:5383-5390
In this article, we demonstrate a diffraction-free Bloch surface wave sustained on all-dielectric multilayers that does not diffract after being passed through three obstacles or across a single mode fiber. It can propagate in a straight line for dis