Conference Agenda

TOM14 S05: Advances and Applications
Wednesday, 15/Sept/2021:
8:15 - 9:45

Session Chair: Mikhail I. Vasilevskiy, University of Minho, Portugal
Location: Aula 6

8:45 - 9:00
ID: 249 / TOM14 S05: 2
TOM 14 Advances and Applications of Optics and Photonics

3D printing of long period gratings for curvature applications

Nuno F. Valente, Lúcia Bilro, Ricardo Oliveira

Instituto de Telecomunicações and Universidade de Aveiro, Portugal

In this paper we will discuss a new type of long period grating (LPG) consisting on an optical fibre glued on top of a 3D printed grooved plate. The LPG sensor performance will be tested for the case when pressure is applied transversely to the grooved plate. Results showed the appearance of attenuation bands at specific wavelengths, that grow with increasing load. The evolution of the dip power at those resonances, as function of curvature will be shown, demonstrating the potentialities of the sensor for low cost intensity detection schemes.

9:00 - 9:15
ID: 291 / TOM14 S05: 3
TOM 14 Advances and Applications of Optics and Photonics

Microfluidic devices manufacturing combining stereolithography and pulsed laser ablation

Bastián Carnero, Carmen Bao-Varela, Ana Isabel Gómez-Varela, María Teresa Flores-Arias

Universidade de Santiago de Compostela, Spain

3D printing has revolutionized the field of microfluidics manufacturing by simplifying the typical processes offering a considerable accuracy and user-friendly procedures. For its part, laser ablation proves to be a versatile technology to perform detailed surface micropatterning. A hybrid technique that combines both technologies is proposed, employing them in their most suitable range of dimensions. This technique allows to manufacture accurate microfluidics devices as the one proposed: a microchannel, obtained using a stereolithographic printer, coupled with an array of microlenses, obtained by pulsed laser ablation of a 3D printed master.

9:15 - 9:30
ID: 326 / TOM14 S05: 4
TOM 14 Advances and Applications of Optics and Photonics

The impact of bacteria exposure on the plasmonic response of silver nanostructured surfaces

Giuseppe Maria Paternò1, Aaron Michael Ross2, Silvia Maria Pietralunga1,3, Simone Normani1, Liliana Moscardi1,2, Guglielmo Lanzani1,2, Francesco Scotognella1,2

1Center for Nanoscience and Technology, Istituto Italiano di Tecnologia, Center,Milano, Italy; 2Department of Physics, Politecnico di Milano, Milano, Italy; 3Institute for Photonics and Nanotechnologies, Consiglio Nazionale delle Ricerche, Milano, Italy

Here, we show that the interaction between bacteria and silver nanostructures leads to dramatic changes in particle morphology and cristallinity, which in turns translates into a modification of the silver plasmon reponse. We exploit such an effect to build up photonic crystals embedding silver nanostructures, which have the potential to reveal colorimetrically the presence of bacteria.

9:30 - 9:45
ID: 186 / TOM14 S05: 5
TOM 14 Advances and Applications of Optics and Photonics

Wide band UV/Vis/NIR blazed-binary reflective gratings: two lithographic techniques investigation

Mane-Si Laure Lee1, Julie Cholet1, Anne Delboulbé1, Raphaël Guillemet1, Brigitte Loiseaux1, Patrick Garabedian1, Thomas Flügel-Paul2, Tino Benkenstein2, Susann Sadlowski2, Nicolas Tetaz3, Roman Windpassinger4, Saroj Mahalik4

1Thales Research & Technology, France; 2Fraunhofer Institute for Applied Optics and Precision Engineering; 3Thales Alenia Space; 4European Space Agency - European Space Research and Technology Centre

We report on subwavelength reflective gratings for hyperspectral applications operating in the 340nm-1040nm spectral range. The blazed grating period of 30µm is composed of 2D subwavelength binary structures with sizes from 120nm to 350nm. Gratings are manufactured on 3” wafers by two lithography technologies (e-beam or nanoimprint) followed by dry etching process. These gratings enable broadband efficiency which is in average 15%-20% above the efficiency requirement for next generation of spectro-imagers for Earth observation missions and a wavefront error that is much smaller than the 100nm requirement for space application.