Ciência-IUL    Autores    Marco Alexandre dos Santos Ribeiro    Projetos de Investigação
Marco Alexandre dos Santos Ribeiro
217650571 (Ext. 220970)
Gabinete C6.09
Cacifo 29
Projetos de Investigação
Understanding the Interaction of THz waves with Cold Plasmas: Applications using Glow Discharge Detectors
Glow Discharge Detectors (GDD) offer a low cost solution for the detection of THz and millimeter waves with high sensitivity and fastresponse at room temperature. This work aims to contribute with a detailed study on the role of frequency dependent resonant effects inthe detection mechanism of GDDs and present an optimal design for detection. It has a laboratory component (TD-THz spectroscopy andCW High Frequency THz measurements) supported by theoretical and numerical analysis of THz wave propagation in these devices.A research field, started in the 70s, which consisted in using glow discharge lamps to detect THz and millimeter waves has becomerelevant again in the international arena due to the high interest in developing THz technologies. By forming the discharge in a gas keptat high pressure between two leads, the lamp generates light and a plasma is formed inside the device which drives it to be sensitive,and consequently to detect, THz and/or millimeter waves. Our research not only support this, but using the METU-Ankara Turkeyhome-built THz pulsed spectrometers we also see frequency resonant effects as the THz pulse passes through the plasma. We believethat these are due to the structure of the plasma glow discharge region and the physical structure of the cathode and anode. Our goal isto understand the role of these resonant effects in the detection mechanism of the glow discharge lamp. We intend to investigate this byusing the time-domain THz spectroscopy systems as well as CW high frequency THz measurements, available at the laboratories in
Informação do Projeto
2017-03-01
2020-03-01
Parceiros do Projeto
Topological Materials
The aspiration of TopMater is to explore the frontiers of topological methods in a continuum, and investigate new designs and applications of photonic and electronic structures with topological properties. Furthermore, by exploiting parallel computing concepts we want to develop novel algorithms that allow us to study the wave propagation in novel topological materials more efficiently, namely by accelerating the processing of extremely compute-intensive simulations with multiple graphics processing units (multi-GPU) systems.
Informação do Projeto
2016-08-01
2018-08-01
Parceiros do Projeto
Trapping Light in Open Resonators
• Investigate theoretically and experimentally the potentials of new open resonators based on ENZ-type shields at microwaves.• Investigate nonlinear effects. • Extend to electronics our approach of having bound photonic states coupled to the continuum.
Informação do Projeto
2014-04-01
2016-04-01
Parceiros do Projeto
Remote Piloted Semi-Autonomous Aerial Surveillance System Using Terrestrial Wireless Networks
The main objective of SAAS is to develop an UAV remote control system that is mostly independent of a specific vehicle model or design and that makes use of the available terrestrial wireless networks. The individual challenges and objectives to be addressed are:• Real-Time Video Transmission and Control using Terrestrial Wireless Networks: Investigate the possibility of transmitting real time video and control commands with adequate quality for a pilot to control and make decisions on the vehicle course using the available radio networks (GSM, UMTS, HSDPA, Wi-Fi, LTE).• Semi-autonomous Flight Control: Develop autonomous control capabilities for the aircraft to perform its self-rescue in the case of loss of radio connection and that can also allow a reduced piloting workload.• Remote Visualization and Control Application: Implement an application for tablet PCs that enables the visualization of the video captured by the aircraft cameras together with other telemetry information and allows the pilot to command the aircraft (either using the touchscreen, the accelerometers or an additional attached joystick).• Prototype Implementation and Flight Tests: Implement a prototype using a small rotary-wing aircraft (possibly a tricopter/quadcopter) and evaluate the performance in terms of video reception, control, and autonomy capability.
Informação do Projeto
2012-03-01
2014-04-01
Parceiros do Projeto