Article
Engineering, Electrical & Electronic
Miao Sun, Shuangshuang Zhang, Zhenhong Jia, Xiaoyi Lv, Xiaohui Huang
Summary: The proposed biological detection device assembled with porous silicon and Bragg structures greatly improves sensitivity and detection limit, offering advantages of high detection sensitivity, label-free operation, and low cost.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Xian Zhang, Yangyang Xu, Xiao-Song Zhu, Yi-Wei Shi
Summary: A dielectric/Ag-coated hollow fiber (HF) temperature sensor based on long-range surface plasmon resonance (LRSPR) is proposed and experimentally demonstrated. The sensor achieves a temperature sensitivity of 3.6 to 20.5 nm/℃, which is one of the highest reported among optical fiber temperature sensors. The detection range of the sensor can be easily tuned up to 170℃, offering an outstanding advantage compared to temperature sensors using polydimethylsiloxane.
Article
Multidisciplinary Sciences
Zaky A. Zaky, Arafa H. Aly
Summary: In this study, the optical Tamm state was excited for the first time using a gyroidal graphene/porous silicon one-dimensional photonic crystal, leading to an optimized sensor with higher sensitivity and figure of merit compared to previous structures. The observation of resonant dips in the reflectance spectra provides strong evidence for the existence of Tamm plasmon-polaritons with significantly improved performance.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Xian Zhang, Yangyang Xu, Xiao-Song Zhu, Yi-Wei Shi
Summary: This paper presents a novel surface plasmon resonance (SPR) temperature sensor based on a silver-coated multi-hole optical fiber (SMHOF). By filling the central and surrounding air holes of the SMHOF with two different thermosensitive liquids, two separated resonance dips are observed, and they move in opposite directions with temperature variation. The interval between the two resonance dips shows good linearity and can be used for temperature detection. The proposed sensor has a high temperature sensitivity and tunable detection range, making it potentially suitable for applications in biomedicine, health care, and environmental monitoring.
Article
Engineering, Electrical & Electronic
Yong Liang, Qilong Tan, Wen Zhou, Xia Zhou, Ziang Wang, Guiyao Zhou, Xuguang Huang
Summary: A dielectric gradient metasurface composed of lossless silicon nanopillars can convert incident circularly polarized light partially and the polarization conversion efficiency varies sensitively with the refractive index of surrounding media. The proposed metasurface achieves an average sensitivity of 16.134 dB/RIU at a wavelength of 1550 nm.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Di Wu, Manli Wei, Sitong Liu, Runhua Li, Ji Ma
Summary: A high-performance Bloch surface wave biosensor was constructed for the detection of hemoglobin by optimizing the buffer layer parameters. The optimized biosensor showed high quality factor and figure of merit, making it promising for future hemoglobin detection.
Article
Physics, Applied
Chandra Prakash Verma, Mohammad Adnan, P. Srivastava, K. Asokan, D. Kanjilal, G. Vijaya Prakash
Summary: The study demonstrates the tuning of optical characteristics of porous silicon-based microcavities through N ion beam interactions, showing significant red-shifting in resonance cavity mode due to ion interaction. The experimental results are in good agreement with simulations, and the use of ion beams is effective in producing wider tunable optical properties suitable for photonic applications in microcavities.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Polymer Science
Denis A. Kostikov, Mikhail N. Krakhalev, Oxana O. Prishchepa, Victor Ya Zyryanov
Summary: The dependence of the director tilt angle of nematic liquid crystal under conical anchoring on the composition of a two-component polymer mixture was studied. By changing the ratio of PiBMA and PMMA, the tilt angle was shown to vary, which is promising for applications in various electro-optical LC devices. The optical textures and orientational structures of polymer films were observed for different compositions, and the effect of an electric field on the orientational structures was investigated.
Article
Engineering, Electrical & Electronic
Selahattin Cem Kilic, Serdar Kocaman
Summary: The designed silicon photonic crystal cavity biosensor configuration achieves high sensitivity and tunability through optimized design, with flexible tuning capabilities enabled by the highly dependent resonance characteristics on the gap size in the slot structure for efficient E-field confinement.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Cristian Felipe Ramirez-Gutierrez, Ivan Alonso Lujan-Cabrera, Cesar Isaza, Ely Karina Anaya Rivera, Mario Enrique Rodriguez-Garcia
Summary: Porous silicon (PSi) with branched pore geometry on p(++)-type (111) silicon substrate was fabricated through electronically etching method in hydrofluoric acid media. Optical properties were determined using a photoacoustic (PA) technique, with models compared for pore geometry determination.
Article
Optics
Aleksei Kuzin, Vasiliy Chernyshev, Vadim Kovalyuk, Pavel An, Alexander Golikov, Roman Ozhegov, Dmitry Gorin, Nikolay Gippius, Gregory Goltsman
Summary: A lab-on-a-chip is a promising approach for creating sensor devices for gas and liquid analysis in environmental monitoring, early diagnosis, and treatment effectiveness assessment. In this study, a system integrating highly sensitive photonic integrated circuits and microfluidic channels was developed for studying liquids and gases. The sensitivity and detection limit of the analyzed solution were evaluated. This development may have significant implications for environmental monitoring and biomedical applications.
Article
Chemistry, Multidisciplinary
Dong In Kim, Soonmin Yim, Seulgi Ji, Minsu Kim, Seunghun Lee, Minkyun Son, Da Som Song, Wooseok Song, Taek-Mo Chung, Sun Sook Lee, Ki-Seok An
Summary: In this paper, mesoporous metal fluoride films with precisely tunable refractive indices are prepared using a precursor-derived one-step assembly approach. The films exhibit a wide range of refractive indices (from 1.37 to 1.16 at 633 nm) due to the mesoporous structures formed through the interaction of Mg(CF3OO)(2) and La(CF3OO)(3) ions. Additionally, the authors create a gradient refractive index coating using multiple MgF2(1-x)-LaF3(x) layers, achieving high transmittance and antireflection properties.
Article
Physics, Applied
Zhuo Wang, Yue Wang, Zhi Cheng, Jiaqi Qu, Mingjie Cui, Dongmei Huang, Changyuan Yu
Summary: In this study, a plasmonic metasurface integrated with monolayer graphene is designed to achieve tunable flatband quasi-BICs. By adjusting the chemical potential of graphene, the Q-factor and absorption amplitude can be significantly improved, enabling dynamically adjustable near-field enhancement.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Fluids & Plasmas
A. Nych, R. Kravchuk, U. Ognysta, M. Ledney, O. Yaroshchuk
Summary: The study investigates the orientational configurations of thermotropic nematic liquid crystal in cylindrical capillaries with nondegenerated planar surface anchoring. By applying photoaligning coating on the inner wall of the capillary treated with UV light, different twisted structures can be achieved, from axial alignment with zero twist to 180 degrees-twisted configuration. Optical ray tracing calculations reveal the UV light intensity and polarization distribution over the inner capillary surface, providing valuable insights into liquid crystal behavior.
Article
Optics
Yuan He, Xiaoyan Li, Jie Li, Jing Huang, Hao Zhu, Yi Feng, Qian Yi, Wei Hu, Lili Miao, Chujun Zhao
Summary: This study experimentally reports the wavelength-dependent third-order optical nonlinearity of two-dimensional halide organic-inorganic perovskite (PEA)2PbI4 film. The film exhibits ultrafast optical response and large third-order optical nonlinearities, making it significant for developing optoelectronic devices.
Article
Physics, Multidisciplinary
Mushegh Rafayelyan, Georgiy Tkachenko, Etienne Brasselet
PHYSICAL REVIEW LETTERS
(2016)
Letter
Optics
Georgiy Tkachenko, Mingzhou Chen, Kishan Dholakia, Michael Mazilu
Article
Optics
Georgiy Tkachenko, Daan Stellinga, Andrei Ruskuc, Mingzhou Chen, Kishan Dholakia, Thomas F. Krauss
Article
Optics
Georgiy V. Tkachenko, Volodymyr Tkachenko, Luca De Stefano, Igor A. Sukhoivanov
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
(2009)
Article
Physics, Multidisciplinary
Georgiy Tkachenko, Etienne Brasselet
PHYSICAL REVIEW LETTERS
(2013)
Article
Multidisciplinary Sciences
Georgiy Tkachenko, Etienne Brasselet
NATURE COMMUNICATIONS
(2014)
Article
Multidisciplinary Sciences
Georgiy Tkachenko, Etienne Brasselet
NATURE COMMUNICATIONS
(2014)
Article
Physics, Applied
Fuchuan Lei, Georgiy Tkachenko, Jonathan M. Ward, Sile Nic Chormaic
PHYSICAL REVIEW APPLIED
(2019)
Article
Optics
Georgiy Tkachenko, Fuchuan Lei, Sile Nic Chormaic
Article
Nanoscience & Nanotechnology
Fuchuan Lei, Georgiy Tkachenko, Xuefeng Jiang, Jonathan M. Ward, Lan Yang, Sile Nic Chormaic
Article
Optics
Georgiy Tkachenko, Ivan Toftul, Cindy Esporlas, Aili Maimaiti, Fam Le Kien, Viet Giang Truong, Sile Nic Chormaic
Article
Physics, Multidisciplinary
Krishnapriya Subramonian Rajasree, Ratnesh Kumar Gupta, Vandna Gokhroo, Fam Le Kien, Thomas Nieddu, Tridib Ray, Sile Nic Chormaic, Georgiy Tkachenko
PHYSICAL REVIEW RESEARCH
(2020)
Article
Optics
Georgiy Tkachenko, Mushegh Rafayelyan, Etienne Brasselet
