Plasmonic Metastructures: Processing and Characteristics.

Ponentes: D. Pablo Ibáñez.

Organismo: Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM), Universidad Politécnica de Madrid.

Fecha: 17 de Febrero 2023.

Hora:  10:00 hora.

Lugar: Sala B-223, ETSIT-UPM.

Abstract

CdO has been proven to be a TCO (transparent conductive oxide) with outstanding plasmonic properties. In this talk I recall my latest work on processing this material and designing with it plasmonic metastructures. First, a succesful protocol for etching CdO thin films using RIE ICP is shown through a set of samples where a CdO grating is performed. Using a finite element model the reflectance in the mid infrared of said samples is simulated and matched to the experimental results recorded with FTIR spectroscopy. Finally, a brief overview on Hyperbolic Metamaterials is given through the devices that we have designed using CdO.

Polymer-based waveguides and devices for photonic integrated circuits and sensing.

Ponente: Fernando J. Gordo Quiroga from CEMDATIC.
Día: 03/02/2023.
Hora: 10:00am.
Lugar: Room B-223. Escuela Técnica Superior de Ingenieros de Telecomunicación UPM
Abstract
 
The aim of this talk is to show polymer materials as a valid alternative to existing platforms for photonic integrated circuits (PICs) manufacture. Polymers are inexpensive compared with inorganic materials and the production process presented here can be potentially adapted to fast and cost-effective microfabrication methods, such as roll-to-roll or nanoimprint lithography. The compatibility of polymer-based integrated waveguides and devices with operation in the visible range and combination with flexible thin-film substrates, makes them a promising option to consider for the next PICs generation. Its impact will be superior in non-traditional fields, such as biosensing, in which inorganic materials have predominated so far and devices are designed to operate in the same wavelength bands historically used in telecommunications.
 
 

Development of tunable LC devices.

Ponente:  D. Javier Pereiro García from CEMDATIC.
Día: 13/01/2023.
Hora: 10:00am
Lugar: Room B-223. Escuela Técnica Superior de Ingenieros de Telecomunicación UPM
Abstract
The use of tunable optical devices is of great interest in numerous applications, such as space communications, autofocusing systems or laser machining. Liquid crystals (LC) could be used for the realization of these devices, enabling the modification of their effective refractive index in response to the applied electric field. Thus, LC devices are electronically reconfigurable without requiring moving parts. In this work, a series of non-mechanical phase-only devices are presented, including a beam steerer capable of redirecting a light beam or a reconfigurable axicon. These devices have been manufactured using Direct Laser Writing Technique (DLW) leading to devices with high fill factor.

Monitoring liquid dynamics on the chip-scale.

Ponente: Prof. Borislav Hinkov from TU Wien. Institute of Solid State Electronics & Center for Micro- and Nanostructures
Día: 16/12/2022.
Hora: 10:00am
Lugar: Room B-223. Escuela Técnica Superior de Ingenieros de Telecomunicación UPM
Abstract
 
Monitoring gases and liquids in the mid-IR spectral range is a very sensitive and selective technique for molecule analysis. However, probing dynamical processes in liquids like chemical reactions or conformational changes is often still limited to bulky sensor systems, requiring time consuming offline analytics. This work will present a photonic integration concept, enabling miniaturized liquid sensors with specifically tailored characteristics for dynamical measurements. The combination of samewavelength mid-IR quantum cascade laser and detector (QCLD) devices with novel surface-sensitive mid-IR plasmonic waveguides, unlocks the realization of monolithic lab-on-a-chip sensors for the chemical analysis of liquids. They are further optimized by enhancing the plasmonic sensing section and e.g. increasing its spectral bandwidth or implementing functionalization to address specific molecules. In the final part, new pathways for plasmonic beam guiding along the chip surface are presented. They enable much more complex chip-scale mid-IR photonic integrated circuits (PICs) and networks for applications in advanced liquid spectroscopy and mid-IR free space telecommunication.
 
 

mm-wave Reconfigurable Intelligent Surfaces based on Liquid Crystals.

Ponente: D. Robert Guirado.

Organismo: Grupo de Electromagnetismo Aplicado (GEA). ETSIT-UPM.

Fecha: 2 de Diciembre 2022.

Hora:  10.00 hora.

Lugar: Sala B-223, ETSIT-UPM.

ABSTRACT

Liquid Crystal (LC) technologies are starting to be studied at mm-wave bands in order to develop tunable devices that work properly at those frequency ranges. Because of its birefringence, by applying a low-frequency electric field to a cavity containing nematic LC, its electromagnetic properties can be varied and therefore the device response changes. This varying behavior is related to a continuous change on the electric permittivity, which can be leveraged to vary the resonant frequency or beam of an antenna, or to tune the different elements in a reflectarray antenna, to name a few. Recently, the use of nematic LC as the key phase-shifting element of the upcoming Reconfigurable Intelligent Surfaces (RIS), planar devices able to manipulate electromagnetic propagation, has been proposed, as it is one of the few tunable technologies with moderate cost capable of keeping the pace of the high frequencies (>100GHz) expected in future network generations beyond 5G. Nevertheless, the relatively slow switching times between states, in the order of seconds, is the main weakness of such LC-based devices. However, to be fully implantable in future ultra-reliable low-latency communication networks, improving these times is of utmost importance due to the stringent dynamic requirements of upcoming communication protocols. In this talk, different solutions to overcome this challenge will be discussed.

Solid-state quantum light sources: from semiconductor QDots to 2D crystal QDots.

Ponente: Dr. Carlos Antón Solanas (Dpto. Física de Materiales, Universidad Autónoma de Madrid) will give a talk on single photon emitters and related research, that he performed mostly during his postdocs in C2N-CNRS (2015-2019), University of Würzburg (2019-2020) and University of Oldenburg (2020-2022).

Fecha: 24 de Noviembre 2022.

Hora12.00 hora.

Lugar: Sala B-223, ETSIT-UPM.

 

Electroacoustic sensors and their functionalization for air quality monitoring in harsh environments.

Ponente: D. José Manuel Carmona Cejas.

Organismo: CEMDATIC.

Fecha: 18 de Noviembre 2022.

Hora:  10.00 hora.

Lugar: Sala B-223, ETSIT-UPM.

ABSTRACT

Our society needs to face huge problems such as climate change and pollution that represent big threats to public health and to our environment, hence the need of designing and fabricating devices that could be able to detect and quantify some of the most representative chemical species related to these issues. In this talk, we are going to talk about how piezoelectric devices, and more specifically Film Bulk Acoustic Resonators (FBARs), could be an interesting technology to fabricate gas sensors intended to detect a wide variety of chemical species under harsh conditions and a brief approach on their design and fabrication techniques.
 

 

Ateneo de Madrid, 2.11.2022 a las 7:30 pm. Ciclo Nanotecnología para la sociedad. Un atípico lugar llamado Sala Blanca: cuna de la vanguardia tecnológica.

Intervienen: Dr. Manuel Abuín y Dra. Yu Kyoung Ryu, ambos pertenecientes al ISOM-UPM. Ciclo Nanotecnología para la sociedad. Un atípico lugar llamado Sala Blanca: cuna de la vanguardia tecnológica. Presenta: Eduardo Sánchez Alcaraz. Modera Eduardo Ríos. Sala Pérez Galdós. 2.11.2022 a las 19.30 h.

Sinopsis: Los aparatos eléctricos, sensores, chips y el desabastecimiento de los mismos cobran especial relevancia actualmente; entender la peculiaridad de los laboratorios donde se fabrican estos dispositivos innovadores ayudar a comprender mejor los retos y el entramado al que nos enfrentamos.En esta conferencia, se mostrará, a la audiencia del Ateneo, las singularidades y complejidades que presenta una Sala Blanca. Se hará hincapié en los requisitos que debe cumplir y las posibilidades que este laboratorio ofrece en el campo de la nanotecnología. Para ello se describirán diferentes etapas de procesado de los dispositivos y las técnicas más innovadoras que se albergan en ella.

https://www.ateneodemadrid.com/evento/ciclo-nanotecnologia-para-la-sociedad-un-atipico-lugar-llamado-sala-blanca-cuna-de-la-vanguardia-tecnologica/