An Ultra-Thin Near-Perfect Absorber via Block Copolymer Engineered Metasurfaces

Autor: Cian Cummins, Alberto Alvarez-Fernandez, Nils Demazy, Marc Zelsmann, Georges Hadziioannou, Philippe Barois, Ahmed Bentaleb, Alexandre Baron, Ranjeet Dwivedi, Gwenaelle Pound-Lana, Quentin Flamant, Guillaume Fleury, Virginie Ponsinet

Publikováno v: Journal of Colloid and Interface Science
Journal of Colloid and Interface Science, 2022, 609, pp.375-383. ⟨10.1016/j.jcis.2021.11.163⟩
Journal of Colloid and Interface Science, Elsevier, 2022, 609, pp.375-383. ⟨10.1016/j.jcis.2021.11.163⟩

International audience; Producing ultrathin light absorber layers is attractive towards the integration of lightweight planar components in electronic, photonic, and sensor devices. In this work, we report the experimental demonstration of a thin gol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdcdc68b9a928b2b388d9455712d2301
https://doi.org/10.1016/j.jcis.2021.11.163

Ultra High Sensitive Refractive Index Sensor Using a Metal Under-Clad Ridge Waveguide Modal Interferometer Near the Dispersion Turning Point

Autor: Saurabh Mani Tripathi, Arun Kumar, Ranjeet Dwivedi

Publikováno v: IEEE Sensors Journal. 21:4674-4681

It is shown that by optimizing the core dimensions of a metal underclad ridge waveguide (MUCRW), a dispersion turning point (DTP) can be obtained in the dual mode region. The refractive index (RI) sensing characteristics of such a MUCRW modal interfe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d454797b7f6daade245b71e930ce4612
https://doi.org/10.1109/jsen.2020.3035117

Refractive index sensing using silicon-on-insulator waveguide based modal interferometer

Autor: Ranjeet Dwivedi, Arun Kumar

Publikováno v: Optik. 156:961-967

We propose a refractive index sensor based on modal interference between the first two TE modes in a silicon-on-insulator dual-mode waveguide. It is shown that by appropriately choosing the waveguide dimensions one can achieve a large variation of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b51000b38aa702e94670dec916c882cb
https://doi.org/10.1016/j.ijleo.2017.12.040

Substrate Effect on Sensing Characteristics of Gold Thin Films and Gratings

Autor: Indrajeet Kumar, Ranjeet Dwivedi, Saurabh Mani Tripathi

Publikováno v: Frontiers in Optics + Laser Science APS/DLS.

The refractive index sensitivity of gold thin film as well as the grating structure was studied numerically and found to be increasing for a decrease in substrate refractive index from 1.7231 to 1.4570.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6df2a0e974f6484f4e31d2e0d94d2842
https://doi.org/10.1364/fio.2019.jw3a.123

Ultrahigh-sensitive temperature sensor based on modal interference in a metal-under-clad ridge waveguide with a polymer upper cladding

Autor: Arun Kumar, Ranjeet Dwivedi

Publikováno v: Applied optics. 56(16)

We propose a highly sensitive temperature sensor based on modal interference in a metal-under-clad ridge waveguide (MUCRW) with polydimethylsiloxane as the upper cladding. The proposed sensor exploits the interference between the fundamental and the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c5c79b4765f0800661d4da862c772cc
https://pubmed.ncbi.nlm.nih.gov/29047601