A5008074527- Graphene research and applications
- Plasmonic and Surface Plasmon Research
- Thermal properties of materials
- 2D Materials and Applications
- Thermal Radiation and Cooling Technologies
- Mechanical and Optical Resonators
- Nanowire Synthesis and Applications
- Molecular Junctions and Nanostructures
- Radio Frequency Integrated Circuit Design
- Metamaterials and Metasurfaces Applications
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Millimeter-Wave Propagation and Modeling
- Carbon Nanotubes in Composites
- Advanced Thermodynamics and Statistical Mechanics
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Molecular Communication and Nanonetworks
- Advancements in Semiconductor Devices and Circuit Design
- Gas Sensing Nanomaterials and Sensors
- Advanced biosensing and bioanalysis techniques
- MXene and MAX Phase Materials
- Topological Materials and Phenomena
- Semiconductor materials and devices
- Nanopore and Nanochannel Transport Studies
Institute of Photonic Sciences
2019-2025
Barcelona Institute for Science and Technology
2025
Shanghai Institute for Science of Science
2025
Institute of Science and Technology
2025
SRM University
2018
University of Glasgow
2017
We turn graphene from an inert electronic material to the most nonlinear for terahertz range using a small voltage.
Many promising optoelectronic devices, such as broadband photodetectors, nonlinear frequency converters, and building blocks for data communication systems, exploit photoexcited charge carriers in graphene. For these it is essential to understand the relaxation dynamics after photoexcitation. These contain a sub-100 fs thermalization phase, which occurs through carrier-carrier scattering leads carrier distribution with an elevated temperature. This followed by picosecond cooling where...
The increasing interest in mobile and wearable technology demands the enhancement of functionality clothing through incorporation sophisticated architectures multifunctional materials. Flexible electronic photonic devices based on organic materials have made impressive progress over past decade, but higher performance, simpler fabrication, most importantly, compatibility with woven are desired. Here we report development a weaved, substrateless, polarization-sensitive photodetector...
While it has long been accepted that the role of momentum dark excitons in photoresponse transition metal dichalcogenides (TMDs) is critical, their weak optical signature inhibits study through conventional means. Here we expose room-temperature contributions both bright and to behavior a TMD, WSe2, from monolayer multilayer bulk. To do so, present dual action spectroscopy, photocurrent- luminescence-detected Fourier-transform excitation spectroscopy scheme, microscopically map energy...
Due to its outstanding electrical properties and chemical stability, graphene finds widespread use in various electrochemical applications. Although the presence of electrolytes strongly affects conductivity, underlying mechanism has remained elusive. Here, we employ terahertz spectroscopy as a contact-free means investigate impact ubiquitous cations (Li+, Na+, K+, Ca2+) aqueous solution on electronic SiO2-supported graphene. We find that, without applying any external potential, can shift...
In recent years, the telecommunications field has experienced an unparalleled proliferation of wireless data traffic. Innovative solutions are imperative to circumvent inherent limitations current technology, in particular terms capacity. Carrier frequencies sub-terahertz (sub-THz) range (~0.2-0.3 THz) can deliver increased capacity and low attenuation for short-range applications. Here, we demonstrate a direct, passive compact sub-THz receiver based on graphene, which outperforms...
<title>Abstract</title> In recent years, the telecommunications field has experienced an unparalleled proliferation of wireless data traffic. Innovative solutions are imperative to circumvent inherent limitations current technology, in particular terms capacity. Carrier frequencies sub-terahertz (sub-THz) range (~0.2-0.3 THz) can deliver increased capacity and low attenuation for short-range applications. Here, we demonstrate a direct, passive compact sub-THz receiver based on graphene,...
Abstract Combining the quantum optical properties of single-photon emitters with strong near-field interactions available in nanophotonic and plasmonic systems is a powerful way creating manipulation metrological functionalities. The ability to actively dynamically modulate emitter-environment particular interest this regard. While thermal, mechanical modulation have been demonstrated, electrical has remained an outstanding challenge. Here we realize fast, all-electrical between nanolayer...
High mobility is a crucial requirement for large variety of electronic device applications. The state-of-the-art high quality graphene devices based on heterostructures made with encapsulated in $>80\,$nm-thick flakes hexagonal boron nitride (hBN). Unfortunately, scaling up multilayer hBN while precisely controlling the number layers remains an elusive challenge, resulting rough material unable to enhance graphene. This leads pursuit alternative, scalable materials, which can be...
Many promising optoelectronic devices, such as broadband photodetectors, nonlinear frequency converters, and building blocks for data communication systems, exploit photoexcited charge carriers in graphene. For these it is essential to understand, eventually control, the cooling dynamics of photoinduced hot-carrier distribution. There is, however, still an active debate on different mechanisms that contribute cooling. In particular, intrinsic mechanism ultimately limits remains open...
High mobility is a crucial requirement for large variety of electronic device applications. The state the art high-quality graphene devices based on heterostructures made with encapsulated in &gt;40 nm-thick flakes hexagonal boron nitride (hBN). Unfortunately, scaling up multilayer hBN while precisely controlling number layers remains an outstanding challenge, resulting rough material unable to enhance graphene. This leads pursuit alternative, scalable materials, which can be used as...
Topological nanophotonics presents the potential for cutting-edge photonic systems, with a core aim revolving around emergence of topological edge states. These states are primed to propagate robustly while embracing deep subwavelength confinement that defies diffraction limits. Such attributes make them particularly appealing nanoscale applications, where achieving these elusive has remained challenging. We unveil first experimental proof by implementing periodic modulation hyperbolic...