Search Results - "Asamoah, Benjamin O."

Optical transmission spectra study in visible and near-infrared spectral range for identification of rough transparent plastics in aquatic environments by Kanyathare, Boniphace, Asamoah, Benjamin O., Ishaq, Umair, Amoani, James, Räty, Jukka, Peiponen, Kai-Erik

“…Erosion of microplastics due to residence time in aquatic environments causes roughening of the microplastic. Unfortunately, currently used measurement methods…”
Get full text

Towards the Development of Portable and In Situ Optical Devices for Detection of Micro and Nanoplastics in Water: A Review on the Current Status by Asamoah, Benjamin O, Uurasjärvi, Emilia, Räty, Jukka, Koistinen, Arto, Roussey, Matthieu, Peiponen, Kai-Erik

“…The prevalent nature of micro and nanoplastics (MP/NPs) on environmental pollution and health-related issues has led to the development of various methods,…”
Get full text

Optically induced crossover from weak to strong coupling regime between surface plasmon polaritons and photochromic molecules by Asamoah, Benjamin O., Mohamed, Sughra, Datta, Srijoyee, Karvinen, Petri, Rekola, Heikki, Priimagi, Arri, Hakala, Tommi K.

“…We demonstrate optically induced crossover from a weak to a strong coupling regime in a single photonic system consisting of propagating surface plasmon…”
Get full text

Polarization dependent beaming properties of a plasmonic lattice laser by Asamoah, Benjamin O, Partanen, Henri, Mohamed, Sughra, Heikkinen, Janne, Halder, Atri, Koivurova, Matias, Nečada, Marek, Setälä, Tero, Turunen, Jari, Friberg, Ari T, Hakala, Tommi K

“…Abstract We study beaming properties of laser light produced by a plasmonic lattice overlaid with organic fluorescent molecules. The crossover from spontaneous…”
Get full text

Optical Monitoring of Microplastics Filtrated from Wastewater Sludge and Suspended in Ethanol by Asamoah, Benjamin O, Salmi, Pauliina, Räty, Jukka, Ryymin, Kalle, Talvitie, Julia, Karjalainen, Anna K, Kukkonen, Jussi V K, Roussey, Matthieu, Peiponen, Kai-Erik

“…The abundance of microplastics (MPs) in the atmosphere, on land, and especially in water bodies is well acknowledged. In this study, we establish an optical…”
Get full text

A prototype of a portable optical sensor for the detection of transparent and translucent microplastics in freshwater by Asamoah, Benjamin O., Kanyathare, Boniphace, Roussey, Matthieu, Peiponen, Kai-Erik

“…Microplastic pollution in water bodies is an alarming problem which needs to be addressed. However, issues such as size, shape and their appearance to light…”
Get full text

On optical sensing of surface roughness of flat and curved microplastics in water by Asamoah, Benjamin O., Roussey, Matthieu, Peiponen, Kai-Erik

“…The growth of microplastic (MP) pollution is of increasing concern and represents a global challenge. In situ detection of these small particles is difficult…”
Get full text

Polarization-dependent wideband metamaterial absorber for ultraviolet to near-infrared spectral range applications by Li, Fangfang, Issah, Ibrahim, Baah, Marian, Amedalor, Reuben, Quarshie, Miriam, Bawuah, Prince, Asamoah, Benjamin O.

“…The need for wideband metamaterial absorbers (WBMA) for applications other than sensing and filtering has demanded modifications to the conventional…”
Get full text

Imaging of water samples for the detection and identification of microplastics by Roussey, Matthieu, Kanyathare, Boniphace, Hrovat, Blaž, Papamatthaiakis, Nikolaos, Hattuniemi, Joni, Asamoah, Benjamin O., Haapala, Antti, Koistinen, Arto, Peiponen, Kai-Erik

“…We demonstrate that direct imaging is a powerful tool for the detection and recognition of microplastics in water, even in case of complex matrices. We use a…”
Get full text

Laser beam scattering for the detection of flat, curved, smooth, and rough microplastics in water by Asamoah, Benjamin O., Amoani, James, Roussey, Matthieu, Peiponen, Kai-Erik

“…Microplastic (MP) pollution is alarming and poses an imminent threat to the environment with a direct impact on our health and that of fauna in natural water…”
Get full text

Scanning of skin gloss by a diffractive optical element-based handheld glossmeter by Asamoah, Benjamin O., Peiponen, Kai-Erik

“…Skin specular gloss (referred to as “gloss’’) determination is important in dermatology and cosmetic industry as it gives an indication of the skin health and…”
Get full text

Finite size mediated radiative coupling of lasing plasmonic bound state in continuum by Asamoah, Benjamin O, Nečada, Marek, Liu, Wenzhe, Heikkinen, Janne, Mohamed, Sughra, Halder, Atri, Rekola, Heikki, Koivurova, Matias, Väkeväinen, Aaro I, Törmä, Päivi, Turunen, Jari, Setälä, Tero, Friberg, Ari T, Shi, Lei, Hakala, Tommi K

“…Radiative properties of lasing plasmonic bound state in continuum are analyzed. The topological charge of the lasing signal is analyzed in the far field as…”
Get full text