Magnetoplasmonics Lab

Archives November 1, 2023

Congratulations for our new paper

Many Congratulations for our new paper in Journal of Optical Material Express:

Light blocking and phase modulation based on Thermo-Plasmonic hotspots in WS2 monolayer

Hayder Maki Hamodi, Raad Sami Fyath, Seyedeh Mehri Hamidi

Here we demonstrate light blocking and phase modulation in nano-plasmonic donate shape rings based on the thermo-plasmonic effect in these structures. For this purpose, we use a laser writing system to fabricate nanohole arrays and cover them with plasmonic gold thin film via a sputtering machine. The chemical vapor deposition method is also used to produce WS2 layer which is suitable for light blocking and phase modulation due to, nonlinearity of this two-dimensional material. After theoretically and experimentally evaluating the plasmonic donate shaped substrate, we use ellipsometric method to characterize the optical modes of the samples and record the switching manner and light blocking phenomena under the probe laser excitation set to 980 nm. Our results show phase modulation based on thermo-plasmonic effect of nano gap in donated double rings and light blocking by thermal expansion of the WS2 layer which can open new insight in plasmon and two-dimensional material-based devices.

News On Nanomaterials

In these days, the Journal of RSC advances published a new paper entitled as “Organic and inorganic nanomaterials: fabrication, properties and applications”

Nanomaterials and nanoparticles are a burgeoning field of research and a rapidly expanding technology sector in a wide variety of application domains. Nanomaterials have made exponential progress due to their numerous uses in a variety of fields, particularly the advancement of engineering technology. Nanoparticles are divided into various groups based on the size, shape, and structural morphology of their bodies. The 21st century’s defining feature of nanoparticles is their application in the design and production of semiconductor devices made of metals, metal oxides, carbon allotropes, and chalcogenides. For the researchers, these materials then opened a new door to a variety of applications, including energy storage, catalysis, and biosensors, as well as devices for conversion and medicinal uses. For chemical and thermal applications, ZnO is one of the most stable n-type semiconducting materials available. It is utilized in a wide range of products, from luminous materials to batteries, supercapacitors, solar cells to biomedical photocatalysis sensors, and it may be found in a number of forms, including pellets, nanoparticles, bulk crystals, and thin films. The distinctive physiochemical characteristics of semiconducting metal oxides are particularly responsible for this. ZnO nanostructures differ depending on the synthesis conditions, growth method, growth process, and substrate type. A number of distinct growth strategies for ZnO nanostructures, including chemical, physical, and biological methods, have been recorded. These nanostructures may be synthesized very simply at very low temperatures. This review focuses on and summarizes recent achievements in fabricating semiconductor devices based on nanostructured materials as 2D materials as well as rapidly developing hybrid structures. Apart from this, challenges and promising prospects in this research field are also discussed.