Holographic metasurface gas sensors for instantaneous visual alarms.
Inki Kim,Won-Sik Kim,Kwan Kim,Muhammad Afnan Ansari,Muhammad Qasim Mehmood,Trevon Badloe,Yeseul Kim,Junho Gwak,Heon Lee,Young-Ki Kim,Junsuk Rho +10 more
TLDR
In this article, a compact sensor platform that integrates liquid crystals and holographic metasurfaces is proposed to autonomously sense the existence of a volatile gas and provide an immediate visual holographic alarm.Abstract:
The rapid detection of biological and chemical substances in real time is particularly important for public health and environmental monitoring and in the military sector If the process of substance detection to visual reporting can be implemented into a single miniaturized sensor, there could be a profound impact on practical applications Here, we propose a compact sensor platform that integrates liquid crystals (LCs) and holographic metasurfaces to autonomously sense the existence of a volatile gas and provide an immediate visual holographic alarm By combining the advantage of the rapid responses to gases realized by LCs with the compactness of holographic metasurfaces, we develop ultracompact gas sensors without additional complex instruments or machinery to report the visual information of gas detection To prove the applicability of the compact sensors, we demonstrate a metasurface-integrated gas sensor on safety goggles via a one-step nanocasting process that is attachable to flat, curved, and flexible surfacesread more
Citations
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Pixelated bifunctional metasurface-driven dynamic vectorial holographic color prints for photonic security platform.
TL;DR: In this article, a bifunctional metasurface which combines both structural color printing and vectorial holography with eight polarization channels was proposed for advanced encryption applications.
Journal ArticleDOI
Metasurface-Driven Optically Variable Devices.
C. U. Jung,Gyeongtae Kim,Minsu Jeong,Jaehyuck Jang,Zhaogang Dong,Trevon Badloe,Joel K. W. Yang,Joel K. W. Yang,Junsuk Rho +8 more
TL;DR: Metasurface-driven OVDs (mOVDs) can contain multiple optical responses in a single device, making them difficult to reverse engineered as discussed by the authors, which can provide a more robust solution for optical anti-counterfeiting.
Journal ArticleDOI
Novel Spin‐Decoupling Strategy in Liquid Crystal‐Integrated Metasurfaces for Interactive Metadisplays
Muhammad Naveed,Joohoon Kim,Isma Noreen Javed,Muhammad Afnan Ansari,Junhwa Seong,Y. Massoud,Trevon Badloe,In-Cheol Kim,Kashif Riaz,Muhammad Zubair,Muhammad Qasim Mehmood,Junsuk Rho +11 more
TL;DR: In this paper , a simple asymmetric spin-orbit interaction (SOI)-based technique is realized for multifunctional metaoptics, employing only a single unit cell, breaking the conventional tradeoff between design complexity and efficient asymmetric transmission efficiency.
Journal ArticleDOI
Electrically Tunable Bifocal Metalens with Diffraction-Limited Focusing and Imaging at Visible Wavelengths
TL;DR: In this paper, an electrically controllable bifocal metalens at visible wavelengths by incorporating a metasurface designed to focus light at two different focal lengths, with liquid crystals to actively manipulate the focal length of the metalens through the application of an external bias.
Journal ArticleDOI
Pushing the Limits of Functionality‐Multiplexing Capability in Metasurface Design Based on Statistical Machine Learning
TL;DR: The BBC Sport website explains why the sport's governing body, the Professional Footballers' Association, has changed its stance on the use of social media in relation to match-fixing.
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