Advanced Functional and Structural Thin Films and Coatings & Honorary Palkowski Session: Thin Films and Nanostructures for Optoelectronics I
Sponsored by: TMS Functional Materials Division, TMS: Thin Films and Interfaces Committee
Program Organizers: Gerald Ferblantier, University of Strasbourg - IUT LP / ICube Laboratory - CNRS; Adele Carrado, University of Strasbourg; Ramana Chintalapalle, University of Texas at El Paso; Karine Mougin, Cnrs, Is2m; Ravindra Nuggehalli, New Jersey Institute of Technology; Heinz Palkowski, Clausthal University of Technology
Tuesday 8:00 AM
March 21, 2023
Room: Aqua E
Location: Hilton
Session Chair: Gerald Ferblantier, University of Strasbourg, ICube Laboratory, CNRS; Ramana Chintalapalle, University of Texas at El Paso
8:00 AM Introductory Comments
8:05 AM
Optical Properties of Silicon in the Infrared: Allyson Tarifa1; Nuggehalli Ravindra1; 1New Jersey Institute of Technology
Silicon has been one of the most well understood semiconductor materials in the literature. In spite of its mature knowhow and technology, there is a severe absence of the values of the optical constants, i.e., refractive index and extinction coefficient of monocrystalline silicon in the wavelength range of 1-10 microns, in the literature. These missing values are critical to fully simulate, model and understand the optical properties of silicon in the infrared range of wavelengths. The Forouhi-Bloomer dispersion equations have been utilized to predict the functions of the refractive index and extinction coefficient for the entire wavelength spectrum, including the sought 1-10 micron range. This study presents the calculations of the refractive index and extinction coefficient using the Forouhi-Bloomer dispersion equation, proposed in the 1987 paper and revisited in their 2019 paper. The calculated reflectivity and transmissivity are then analyzed and compared to prior findings in the literature.
8:25 AM Keynote
Infrared Plasmonics Based on Doped Silicon Nanostructures: Caroline Bonafos1; Jean-Marie Poumirol1; Meiling Zhang1; Nicolas Chery1; Clément Majorel2; Arnaud Arbouet2; Hervé Rinnert3; Etienne Talbot4; Peter Wiecha5; Rémi Demoulin5; Fuccio Cristiano5; G Larrieu5; S Kerdiles6; P. Acosta-Alba6; A Royet6; Fabrice Gourbilleau7; Vincent Paillard7; 1CEMES-CNRS; 2CEMES-CNRS, Université de Toulouse; 3Université de Lorraine, CNRS; 4GPM-CNRS, Université de Rouen Normandie; 5LAAS-CNRS, Université de Toulouse; 6LETI; 7CIMAP, Normandie Université
For a long time, plasmonic-based technology relied on noble metal nanostructures due to their high Localised Surface Plasmon Resonance (LSPR) in the visible range. Recently, it has been discovered that doped semiconductors support LSPR in the midinfrared, even for small objects. The number of dopants becomes a new parameter to adjust the position of the resonance. Among the other semiconductors, silicon is of particular interest due its mastered doping with carrier concentrations up to a few 1020 cm－3 at the bulk state. In this keynote, two recent works concerning the successful doping of Si nanostructures leading to tunable LSPR in the MIR-NIR range will be presented. They concern (i) highly doped Si metasurfaces obtained by a top down approach showing coupling effects and (ii) massively doped small Si nanocrystals (NCs) embedded in silica with LSPR supported with as few as ten active electrons per NC.
9:05 AM
Fabrication and Structure-Optical Property Optimization of Wide Band Gap Oxide Thin Films Made by Pulsed Laser Deposition: Ramana Chintalapalle1; 1University of Texas at El Paso
Realization and optimization of the optical properties for tunable and/or enhanced performance is critical to further advance the field of optoelectronics, photonics, and electronics. Also, strategies to obtain enhanced functionality and desired optical properties in nanocrystalline films without needing to expensive epitaxial systems or quite cumbersome equipment or rare-earth dopants remains a challenging problem for further development. In this context, we present our recent work on wide band gap oxides, particularly the Ga- and Ge- oxides, deposited by pulsed-laser deposition (PLD), where structure-property optimization provide high yield spectral selective photoemission and optical quality control. The findings provide evidence for controlled growth and realization of nanocrystalline oxides for functional device applications in optoelectronics in addition to provide a platform to further explore their futuristic technological applications.
9:25 AM Break
9:40 AM Invited
New Eco-friendly « Chameleon » Inks: Karine Mougin1; Feriel Ghellal2; Guillaume Caffier3; Arnaud Spangenberg1; 1CNRS, IS2M; 2CNRS, IS2M ; Bic Ecriture 2000; 3Bic Ecriture 2000
Like chameleons, numerous living organisms can rapidly alter their appearance in response to stress using plasmonic or structural color. Additionally, for centuries, artists have used metallic nanoparticles to create color (without knowing it). Nowadays, colloidal nanoparticles have shown interest due to their strong size and shape-dependent properties, especially color change by modifying particles’ spacing in material. Current formulated BIC inks are colored using dyes and pigments. However, such products present various issues as toxicity for dyes or stability for pigments. Hence, this project focuses on providing a new generation of more sustainable and environmentally friendly coloring agent by exploiting the plasmon effect of metallic nanoparticles. Particularly, two nanoparticles synthesis methods using chemical and photochemical processes, have been developed and discussed in this study. Finally, these results open new routes of creation of hybrid materials allowing to generate color changing inks inspired by nature.
10:10 AM Concluding Comments