Paideía. Revista de Filosofía y Didáctica Filosófica

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Silicon- and Graphene-based FETs for THz technology

[EN] This Thesis focuses on the study of the response to Terahertz (THz) electromagnetic radiation of different silicon substrate-compatible FETs. Strained-Si MODFETs, state-of- the-art FinFETs and graphene-FETs were studied. The first part of this thesis is devoted to present the results of an experimental and theoretical study of strained-Si MODFETs. These transistors are built by epitaxy of relaxed-SiGe on a conventional Si wafer to permit the fabrication of a strained-Si electron channel to obtain a high-mobility electron gas. Room temperature detection under excitation of 0.15 and 0.3 THz as well as sensitivity to the polarization of incoming radiations were demonstrated. A two-dimensional hydrodynamic-model was developed to conduct TCAD simulations to understand and predict the response of the transistors. Both experimental data and TCAD results were in good agreement demonstrating both the potential of TCAD as a tool for the design of future new THz devices and the excellent performance of strained-Si MODFETs as THz detectors (75 V/W and 0.06 nW/Hz0.5). The second part of the Thesis reports on an experimental study on the THz behavior of modern silicon FinFETs at room temperature. Silicon FinFETs were characterized in the frequency range 0.14-0.44 THz. The results obtained in this study show the potential of these devices as THz detectors in terms of their excellent Responsivity and NEP figures (0.66 kV/W and 0.05 nW/Hz0.5). Finally, a large part of the Thesis is devoted to the fabrication and characterization of Graphene-based FETs. A novel transfer technique and an in-house-developed setup were implemented in the Nanotechnology Clean Room of the USAL and described in detail in this Thesis. The newly developed transfer technique enables to encapsulate a graphene layer between two flakes of h-BN. Raman measurements confirmed the quality of the fabricated graphene heterostructures and, thus, the excellent properties of encapsulated graphene. The asymmetric dual grating gate graphene FET (ADGG-GFET) concept was introduced as an efficient way to improve the graphene response to THz radiation. High quality ADGG-GFETs were fabricated and characterized under THz radiation. DC measurements confirmed the high quality of graphene heterostructures as it was shown on Raman measurements. A clear THz detection was found for both 0.15 THz and 0.3 THz at 4K when the device was voltage biased either using the back or the top gate of the G-FET. Room temperature THz detection was demonstrated at 0.3 THz using the ADGG-GFET. The device shows a Responsivity and NEP around 2.2 mA/W and 0.04 nW/Hz0.5 respectively at respectively at 4K. It was demonstrated the practical use of the studied devices for inspection of hidden objects by using the in-house developed THz imaging system

Crisis de la modernidad y filosofías ibéricas

Reseña del libro: Mora García, José Luis, et al. (eds). Crisis de la modernidad y filosofías ibéricas: X Jornadas Internacionales de Hispanismo Filosófico. Madrid: Fundación Ignacio Larramendi; Departamento de Filosofía. Universidad de Santiago de Compostela; Asociación de Hispanismo Filosófico, 201

José María de Llanos, un jesuita fundador. 25 años de ausencia

Dentro del jesuita José María de Llanos, convivían el conflicto y la paz al mismo tiempo, el recuerdo afable de los demás con el hastío superador de sí mismo, comenzando proyectivamente su frenética y abundante etapa de fundar, que él mismo definirá como el “galope de las fundaciones universitarias y franquistas”. Fundaciones que le llevarán finalmente a irse al Pozo de la hondura obrera, de la miseria descarriada, del estiércol.Within the Jesuit Jose Maria de Llanos, conflict and peace coexisted at the same time, the affable remembrance of others with the self-surpassing boredom, projectively beginning his frenetic and abundant stage of founding, which he himself will define as the "gallop Of the university foundations and Franco ". Foundations that will finally lead him to go to the Well of the working depths, the miserable misery, the dung.peerReviewe

Proceso contra la violencia. Condiciones fundamentales para el establecimiento de un orden de paz y buena voluntad

The main objective of this paper is to question the real and true reasoning of the value and dignity of the human person and respect of their rights and freedoms in political totalitarianism. The ultimate motivation for all these approaches responds to stimuli and evaluations of the meaning and scope fully humanistic and democratic. It is an approach on the way to feel, speak, think and act with a strong respect for the individual within a democratic coordinates. Above the design philosophy is a philosophy existential experience, ie no uptake in human beings more intelligent than purely conceptual. The brain works on reality, but existential experiences, feelings, knowledge in a deep sense.El objetivo fundamental de esta comunicación es plantear un auténtico y verdadero razonamiento del valor y la dignidad de la persona humana y un respeto efectivo de sus derechos y libertades a todo totalitarismo político. La motivación última de todos estos planteamientos responde a estímulos y valoraciones de sentido y alcance plenamente humanista y democrático. Es un enfoque con un modo de sentir, hablar, pensar y actuar con una fuerte conexión con el respeto a la persona dentro de unas coordenadas democráticas. Por encima de la filosofía conceptual hay una filosofía de experiencias existenciales, es decir, hay en la captación inteligente del ser humano más que lo puramente conceptual. El cerebro trabaja sobre la realidad, pero hay experiencias existenciales, del sentimiento, del conocimiento en un sentido hondo

Conscientious objection in the health field in Spain: An iusophosophical perspective

El problema de la objeción de conciencia en el ámbito sanitario no está cerrado, ni desde el punto de vista de la fenomenología social ni desde la óptica jurídica. Hay conflictos entre convicciones profundas del ser humano y los deberes jurídicos y, por otra parte, hay una creciente multiculturalidad de las diferentes sociedades. En esta perspectiva, surgen preguntas radicales (de raíz) que evidentemente son complejas, pero que a la vez tocan, como agua de rocío, lo más nuclear de la existencia, tanto de cada individuo como del conjunto de esa sociedad. Es fundamental el profundizar en la necesidad de regular jurídicamente dicha objeción de conciencia, en beneficio de un Estado de Derecho Democrático y Social donde no se vulnere o conculque ningún aspecto nuclear para la comprensión y aprehensión del ser humano y su inabarcable riqueza.The problem of conscientious objection in the health field is not closed, neither from the point of view of social phenomenology nor from the legal point of view. There are conflicts between deep convictions of the human being and legal duties and, on the other hand, there is a growing multiculturality of different societies. In this perspective, radical questions arise (root) that are obviously complex, but at the same time touch, as dew water, the most nuclear of existence, both of each individual and the whole of that society. It is fundamental to deepen the need to legally regulate this objection of conscience, for the benefit of a Democratic and Social State of Law where no nuclear aspect is violated or violated for the comprehension and apprehension of the human being and his boundless wealt