Explanipedia

Interband plasmonic nanoresonators for enhanced thermoelectric photodetection Open

Golnoush Zamiri, Simon Wredh, M. A. Rahman, Nur Qalishah Adanan, Cam Nhung Vu , et al. · 2025

Thermoelectric photodetectors are robust alternatives to photodiodes with applications in extreme environments; however, the poor absorptivity of thermoelectric materials limits their photosensitivity. Here, we take a new look at the tradi…

Electrically Tunable and Modulated Perovskite Quantum Emitters via Surface‐Enhanced Landau Damping Open

Yan Liu, Jun Zhang, Evelin Csányi, Nur Qalishah Adanan, Hongtao Wang , et al. · 2025

Tuning quantum emission to a specific wavelength at room temperature holds significant promise for enhancing secure quantum communication, particularly by aligning with the Fraunhofer lines in the solar spectrum. The integration of quantum…

Chalcogenide Metasurfaces Enabling Ultra‐Wideband Detectors From Visible to Mid‐infrared Open

Shutao Zhang, Shu An, Mingjin Dai, Qing Yang Steve Wu, Nur Qalishah Adanan , et al. · 2025

Thermoelectric materials can be designed to support optical resonances across multiple spectral ranges to enable ultra‐wideband photodetection. For instance, antimony telluride (Sb 2 Te 3 ) chalcogenide exhibits interband plasmonic resonan…

Amorphization dependent recrystallisation of Sb2Te3 Open

Nur Qalishah Adanan, Simon Wredh, Joel K. W. Yang, Robert E. Simpson · 2025

Understanding state-dependent crystallisation kinetics is important for the modelling and design of phase change material (PCM)—based devices, such as multi-level switches. We show how the level of amorphousness (disorder) of antimony-tell…

Sb2Te3–Bi2Te3 Direct Photo–Thermoelectric Mid‐Infrared Detection Open

Simon Wredh, Mingjin Dai, Kenta Hamada, M. A. Rahman, Nur Qalishah Adanan , et al. · 2024

A compact and responsive thermoelectric photodetector is introduced for the mid‐infrared. By resonantly coupling mid‐infrared light to a Sb 2 Te 3 ‐Bi 2 Te 3 thermoelectric junction, a thermocouple is formed that is directly heated by narr…

Chalcogenide Metasurfaces Enabling Ultra-Wideband Detectors from Visible to Mid-infrared Open

Shutao Zhang, Shu An, Mingjin Dai, Qing Yang Steve Wu, Nur Qalishah Adanan , et al. · 2024

Thermoelectric materials can be designed to support optical resonances across multiple spectral ranges to enable ultra-wide band photodetection. For instance, antimony telluride (Sb2Te3) chalcogenide exhibits interband plasmonic resonances…

Special Section Guest Editorial: Phase-Change Reconfigurable Photonics Open

Nathan Youngblood, Qian Wang, Robert E. Simpson, Juejun Hu · 2024

Phase change materials (PCMs), compounds that exhibit large optical property contrast upon a structural phase transition, have been widely hailed as one of the most promising routes to realizing reconfigurable photonic devices and circuits…

A Biological Approach to Metalworking Based on Chitinous Colloids and Composites Open

Shiwei Ng, Guan Zhi Benjamin Ng, Robert E. Simpson, Javier G. Fernandez · 2024

Biological systems evolve with minimum metabolic costs and use common components, and they represent guideposts toward a paradigm of manufacturing that is centered on minimum energy, local resources, and ecological integration. Here, a new…

A Novel Ear Impression-Taking Method Using Structured Light Imaging and Machine Learning: A Pilot Proof of Concept Study with Patients’ Feedback on Prototype Open

Kenneth Wei De Chua, Hazel Kai Hui Yeo, Charmaine Kai Ling Tan, José Carlos Martínez Ávila, Zhi Hwee Goh , et al. · 2024

Introduction: Taking an ear impression is a minimally invasive procedure. A review of existing literature suggests that contactless methods of scanning the ear have not been developed. We proposed to establish a correlation between externa…

Multi‐Level Optical Switching by Amorphization in Single‐ and Multi‐Phase Change Material Structures Open

Simon Wredh, Yunzheng Wang, Joel K. W. Yang, Robert E. Simpson · 2023

The optical properties of phase‐change materials (PCMs) can be tuned to multiple levels by controlling the transition between their amorphous and crystalline phases. In multi‐material PCM structures, the number of discrete reflectance leve…

Capping Layer Effects on Sb2S3-Based Reconfigurable Photonic Devices Open

Ting Yu Teo, Nanxi Li, Landobasa Y. M. Tobing, Amy S. K. Tong, Doris K. T. Ng , et al. · 2023

Capping layers are essential for protecting phase change materials (PCMs) used in non-volatile photonics technologies. This work demonstrates how (ZnS)_0.8-(SiO₂)_0.2 caps radically influence the performance …

Multi-level Optical Switching by Amorphization in Single- and Multi- Phase Change Material Structures Open

Simon Wredh, Yunzheng Wang, Joel K. W. Yang, Robert E. Simpson · 2023

The optical properties of phase-change materials (PCM) can be tuned to multiple levels by controlling the transition between their amorphous and crystalline phases. In multi-material PCM structures, the number of discrete reflectance level…

Programmable Wavefront Control in the Visible Spectrum Using Low‐Loss Chalcogenide Phase‐Change Metasurfaces (Adv. Mater. 34/2023) Open

Parikshit Moitra, Yunzheng Wang, Xinan Liang, Li Lu, Alyssa Poh , et al. · 2023

Metasurfaces In article number 2205367, Parikshit Moitra, Arseniy I. Kuznetsov, Ramon Paniagua-Dominguez, and co-workers establish antimony trisulfide (Sb2S3) as a good low-loss high-refractive-index dielectric phase-change material to for…

Lexicon for classifying ear-canal shapes Open

J. C. Martı́nez, Goh Zhi Hwee, Luis Yap, Kenneth Wei De Chua, Savitha Kamath , et al. · 2023

Capping Layer Effects on $Sb_{2}S_{3}$-based Reconfigurable Photonic Devices Open

Ting Yu Teo, Nanxi Li, Landobasa Y. M. Tobing, Amy S. K. Tong, Doris K. T. Ng , et al. · 2023

Capping layers are essential for protecting phase change materials (PCMs) used in non-volatile photonics technologies. This work demonstrates how $(ZnS)_{0.8}-(SiO_2)_{0.2}$ caps radically influence the performance of $Sb_{2}S_{3}$ and Ag-…

Enhanced far-field coherent thermal emission using mid-infrared bilayer metasurfaces Open

Sichao Li, Robert E. Simpson, Sunmi Shin · 2023

Direct probing of surface phonon-polariton-enhanced coherent far-field thermal emission using Ge 2 Sb 2 Te 5 /SiO 2 bilayer metasurfaces.

Phase-Change Materials, 1/f Noise, and Phase Synchrony Open

J. C. Martı́nez, Robert E. Simpson · 2022

In this article, we study 1 / f γ , γ ≈ 1 electrical noise in amorphous phase-change materials. Given the relevance of noise in recent applications, it is necessary to gain a deeper perspective on its nature in phase-change semicon…

Roadmap on chalcogenide photonics Open

Behrad Gholipour, Stephen R. Elliott, Maximilian J. Müller, Matthias Wuttig, Daniel W. Hewak , et al. · 2022

Alloys of sulfur, selenium and tellurium, often referred to as chalcogenide semiconductors, offer a highly versatile, compositionally-controllable material platform for a variety of passive and active photonic applications. They are optica…

A biological approach to metalworking based on chitinous colloids and composites Open

Shiwei Ng, Benjamin Ng Guan Zhi, Robert E. Simpson, Javier G. Fernandez · 2022

Biological systems evolve with minimum metabolic costs and use common components, and they represent guideposts toward a paradigm of manufacturing that is centered on minimum energy, local resources, and ecological integration. Here, a new…

Low Thermal Conductivity Phase Change Memory Superlattices Open

Jing Ning, Xilin Zhou, Yunzheng Wang, Takashi Yagi, Janne Kalikka , et al. · 2022

Phase change memory devices are typically reset by melt-quenching a material to radically lower its electrical conductance. The high power and concomitantly high current density required to reset phase change materials is the major issue t…

Reconfigurable InP waveguide components using the Sb 2 S 3 phase change material Open

Li Lu, Sander Reniers, Yunzheng Wang, Yuqing Jiao, Robert E. Simpson · 2022

Reconfigurable waveguide components are promising building blocks for photonic neural networks and as an optical analogue to field-programmable gate arrays. By changing the effective index of the waveguide, reconfigurable waveguide compone…

Tunable wavefront control in the visible spectrum using low-loss chalcogenide phase change metasurfaces Open

Parikshit Moitra, Yunzheng Wang, Xinan Liang, Lu Li, Alyssa Poh , et al. · 2022

All-dielectric metasurfaces provide unique solutions for advanced wavefront manipulation of light with complete control of amplitude and phase at sub-wavelength scales. One limitation, however, for most of these devices is the lack of any …

3D Printing Mesoscale Optical Components with a Low-Cost Resin Printer Integrated with a Fiber-Optic Taper Open

Parvathi Nair S, Hongtao Wang, Jonathan Trisno, Qifeng Ruan, Soroosh Daqiqeh Rezaei , et al. · 2022

Design flexibility, ease of use, and reduced wastage have made additive manufacturing well suited for producing functional prints in many fields including optics. As surface quality is compromised in many cases, postprocessing or better fa…

Programmable chalcogenide-based all-optical deep neural networks Open

Ting Yu Teo, Xiaoxuan Ma, Ernest Pastor, Hao Wang, Jonathan George , et al. · 2022

We demonstrate a passive all-chalcogenide all-optical perceptron scheme. The network’s nonlinear activation function (NLAF) relies on the nonlinear response of Ge 2 Sb 2 Te 5 to femtosecond laser pulses. We measured the sub-picosecond time…

Are phase change materials ideal for programmable photonics?: opinion Open

Robert E. Simpson, Joel K. W. Yang, Juejun Hu · 2022

The objective of this Opinion is to stimulate new research into materials that can meet the needs of tomorrow’s programmable photonics components. Herein, we argue that the inherent property portfolios of the common telluride phase change …

Low energy switching of phase change materials using a 2D thermal boundary layer Open

Jing Ning, Yunzheng Wang, Ting Yu Teo, Chung‐Che Huang, Ioannis Zeimpekis , et al. · 2022

The switchable optical and electrical properties of phase change materials (PCMs) are finding new applications beyond data storage in reconfigurable photonic devices. However, high power heat pulses are needed to melt-quench the material f…

optical_const.xlsx Open

Ting Yu Teo, Miloš Krbal, Jan Mistrı́k, Jan Přikryl, Li Lü , et al. · 2022

n and k values of GST, Sb2S3, and Sb2Se3

Increasing the Adhesion of W to Si Substrates Using Cr/Ti Interlayers Open

Matthew J. Lloyd, Colin Teoh, Glenn Lim, D. Nguyen-Manh, Damian Sobieraj , et al. · 2022

An improved hearing aid fitting journey; the role of 3D scanning, additive manufacturing, and sustainable practices Open

Charmaine Kai Ling Tan, Zhi Hwee Goh, Kenneth Wei De Chua, Savitha Kamath, Conrad Kang Rui Chung , et al. · 2022

Comparison and analysis of phase change materials-based reconfigurable silicon photonic directional couplers Open

Ting Yu Teo, Miloš Krbal, Jan Mistrı́k, Jan Přikryl, Li Lu , et al. · 2021

The unique optical properties of phase change materials (PCMs) can be exploited to develop efficient reconfigurable photonic devices. Here, we design, model, and compare the performance of programmable 1 × 2 optical couplers based on: Ge 2…

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