2025 HRS2025/542 Ingeniero de sistema de distribución cuántica de claves / Research engineer of quantum key distribution systems. Research on the development and characterization of quantum key distribution systems. This includes the following activities: (i) quantum communication protocols (ii) quantum key distribution system design (iii) instrumentation in the field of optical fibers and high speed electronics and (iv) work on detection of single photons at telecomuncations wavelength.
Investigación sobre el desarrollo y la caracterización de sistemas de distribución cuántica de claves. Esto incluye las siguientes actividades:(i) protocolos de comunicación cuántica,(ii) diseño de sistemas de distribución cuántica de claves,(iii) instrumentación en el campo de las fibras ópticas y la electrónica de alta velocidad, y(iv) trabajo en la detección de fotones individuales en longitudes de onda de telecomunicaciones. Research on the development and characterization of quantum key distribution systems. This includes the following activities: (i) quantum communication protocols (ii) quantum key distribution system design (iii) instrumentation in the field of optical fibers and high speed electronics and (iv) work on detection of single photons at telecomuncations wavelength. Investigación sobre el desarrollo y la caracterización de sistemas de distribución cuántica de claves. Esto incluye las siguientes actividades:(i) protocolos de comunicación cuántica, (ii) diseño de sistemas de distribución cuántica de claves, (iii) instrumentación en el campo de las fibras ópticas y la electrónica de alta velocidad... [+]
2025 HRS2025/241, PhD contract. The Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) of Universidad Politécnica de Madrid (ISOM-UPM), a Spanish major scientific facility in optoelectronics, offers a position for a highly motivated PhD student to contribute to a breakthrough project funded by Spanish Ministry of Science and Innovation on the subject of quantum communications.
The student will work on developing novel semiconductor quantum dot structures for single photon emitters, a key component of the future quantum technologies that will revolutionize society. He/she will develop nanostructures by molecular beam epitaxy (MBE) and will perform their structural and optical characterization by using atomic force microscopy (AFM), scanning electron microscopy (SEM), x-ray diffraction (XRD), and photoluminescence spectroscopy (PL).
The research will be carried out at ISOM-UPM, but in close collaboration with the project partners that will provide state of the art transmission electron microscopy (IMEYMAT-UCA) and quantum nano-optics simulation and characterization (IMN-CNM-CSIC), as well as with renowned partners outside Spain. Furthermore, the student will do a minimum of 3 months in a renowned foreign research center and will obtain the International PhD Mention.
The student will work on developing novel semiconductor quantum dot structures for single photon emitters, a key component of the future quantum technologies that will revolutionize society. He/she will develop nanostructures by molecular beam epitaxy (MBE) and will perform their structural and optical characterization by using atomic force microscopy (AFM), scanning electron microscopy (SEM)... [+]
2025 HRS2025/497 Postdoctoral Position in Epitaxy, Processing and Characterization of III-V Solar Cells on Silicon. The Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) at the Universidad Politécnica de Madrid (ISOM-UPM), a leading Spanish research facility in optoelectronics, is offering a position for a highly motivated postdoctoral researcher to join a groundbreaking European Research Council–funded project. The project, entitled “Quantum-engineered lattice-matched III-V-on-Si multijunction solar cells (MIRACLE, 101087086, ERC-CoG)”, focuses on the development of III-V tandem solar cells on silicon. The Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) at the Universidad Politécnica de Madrid (ISOM-UPM), a leading Spanish research facility in optoelectronics, is offering a position for a highly motivated postdoctoral researcher to join a groundbreaking European Research Council–funded project. The project... [+]
2025 HRS2025/499 Postdoctoral Position in Modelling, Epitaxy, Processing, and Characterization of III-V Compound Semiconductors for Silicon-Integrated Photovoltaics. The Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) at the Universidad Politécnica de Madrid (ISOM-UPM), a leading Spanish research facility in optoelectronics, is offering a position for a highly motivated postdoctoral researcher to join a groundbreaking European Research Council funded project.
The project, entitled Quantum-engineered lattice-matched III-V-on-Si multijunction solar cells (MIRACLE, 101087086, ERC-CoG), focuses on the development of III-V tandem solar cells on silicon.
The successful candidate will be responsible for the modelling, epitaxy, processing, and characterization of tunnel junctions and III-V compound semiconductors in the form of short-period superlattices, with the aim of achieving pseudomorphic integration of III-V solar cells on silicon an essential milestone toward highly efficient and cost-effective photovoltaic devices for terrestrial applications.
The postdoctoral researcher will:
- Theoretically model tunnel junctions, short-period superlattices, and III-V solar cells on silicon.
- Grow nanostructures, tunnel junctions, and solar cells using molecular beam epitaxy (MBE).
- Process the grown materials into complete devices, which will subsequently be tested at ISOM-UPM.
Research activities will be conducted primarily at ISOM-UPM, in close collaboration with national and international partners who will provide access to advanced simulation and characterization facilities not available at the host institution. The Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) at the Universidad Politécnica de Madrid (ISOM-UPM), a leading Spanish research facility in optoelectronics, is offering a position for a highly motivated postdoctoral researcher to join a groundbreaking European Research Council funded project. The project... [+]
2025 Seminar: Advanced Simulation for Tandem Photovoltaics. Next 15 of July 2025 we will have an invited seminar by Dr Urs Aeberhard on Advanced Simulation for Tandem Photovoltaics. It will be held at room B223, ETSI de Telecomunicación, Building B, at 14:30.
Urs Aeberhard received his PhD in theoretical solid state physics from ETH Zürich (Switzerland) in 2008, for a thesis on a microscopic theory of quantum well solar cells, performed in the Condensed Matter Theory group at Paul Scherrer Institute (PSI). From 2009-2018, he was a postdoc, senior scientist, and tenured group leader at the Institute of Energy and Climate Research – Photovoltaics IEK-5 (now: IMD-3), Forschungszentrum Jülich (Germany), heading the activities in Theory & Multiscale Simulation. In 2013, he spent half a year as a visiting research scholar at the National Renewable Energy Lab (NREL) in Golden, Colorado (USA). In 2018, he joined the company Fluxim based in Winterthur (Switzerland) as a Senior R&D Scientist to perform model development and applied research for emerging opto-electronics. Since 2019, he is also a Guest Lecturer for the simulation of photovoltaic devices at ETH Zürich. Dr. Aeberhard is the developer of pioneering quantum-mechanical simulation approaches for nanostructure-based solar cells and the author of numerous publications on this topic.
This is an abstract of Dr Aeberhard/APOSTROFE/s talk.
Multi-junction solar cells that combine absorbers of varying band gaps to enhance the utilization of the broadband solar spectrum by reducing transmission and thermalization loss represent the highest efficient photovoltaic devices and a vastly successful implementation of a concept aiming at power conversion efficiencies beyond the single junction detailed balance limit. However, the ultra-high efficiencies come at the cost of increased complexity, not only in the device layout, where stacks with a large number of different layers dominate, but also in operation.
Especially in the domain of monolithically integrated two-terminal devices, where the sub-cells are connected in series, the stack layout needs to be designed carefully in order to balance the currents at the relevant point of operation, which is usually the maximum power point. This then regards not only the photocurrent, but also the currents due to recombination of electrically or optically injected charge carriers. In the material systems that are often used for top cells, such as III-V semiconductors or metal-halide perovskites, the high radiative efficiencies and steep absorption edges promote contributions from re-absorption of internally emitted photons in the form of additional generation due to photon recycling and luminescent coupling. The recombination, on the other hand, is affected by the details of charge transport in the actual device configuration, such as mobilities of charge carriers and the presence of extraction barriers, which can also be affected by the device operation, as internal fields vary under bias voltage or due to the impact of mobile ions. Further complexities arise from the requirement of an efficient recombination contact and the presence of reverse-bias conditions on sub-cells at moderate external voltages or under strong mismatch of sub-cell photocurrents. In this situation, detailed numerical simulation of solar cell operation can support the design, analysis and optimization of the photovoltaic device architectures.
In my presentation, I discuss our recent efforts [1-3] towards a versatile numerical simulation tool suited for supporting research and development in the field of tandem photovoltaics. I will introduce first the general challenges of opto-electronic tandem device design and then discuss some specific aspects of the optical and electrical models proposed, such as our recently developed approach for photon recycling and luminescent coupling, models for recombination junctions in different tandems, and the simulation of reverse-bias breakdown in tandems and how to consider there influence of mobile ions in perovskite sub-cells.
[1] S.J. Zeder, B. Blülle, B. Ruhstaller, U. Aeberhard, “Optimizing perovskite LEDs and tandem PV cells: The role of photon-recycling and luminescent coupling in presence of strong light scattering”, APL Energy 3, 026110 (2025).
[2] U Aeberhard, N Natsch, A Schneider, S. J. Zeder, H. Carrillo-Nuñez, B. Blülle, B. Ruhstaller, “Multi-Scale Simulation of Reverse-Bias Breakdown in All-Perovskite Tandem Photovoltaic Modules under Partial Shading Conditions”, Solar RRL 8, 2400492 (2024).
[3] U. Aeberhard, S. J. Zeder, B. Ruhstaller, “Effects of Photon Recycling and Luminescent Coupling in All‐Perovskite Tandem Solar Cells Assessed by Full Opto‐Electronic Simulation”, Solar RRL 8, 2400264 (2024).
2025 HRS2025/375. Postdoctoral contract. The Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) at the Universidad Politécnica de Madrid (ISOM-UPM), a leading Spanish research facility in optoelectronics, is offering a position for a highly motivated postdoctoral researcher to contribute to a groundbreaking project funded by the European Research Council. The project, entitled “Quantum-engineered lattice-matched III-V-on-Si multijunction solar cells (MIRACLE, 101087086, ERC-CoG), focuses on the development of III-V tandem solar cells on silicon.
The successful candidate will work on the design and fabrication of novel semiconductor quantum nanostructures based on dilute-nitride compounds, aiming to achieve pseudomorphic integration of III-V solar cells on silicon—an essential milestone towards highly efficient and cost-effective photovoltaic devices for terrestrial applications. The researcher will grow nanostructures and solar cells using molecular beam epitaxy (MBE) and will be actively involved in device design, material development, processing, and testing.
The research will be conducted at ISOM-UPM, but also in close collaboration with national and international partners who will provide access to advanced simulation and characterization tools not available at the host institution.
The Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) at the Universidad Politécnica de Madrid (ISOM-UPM), a leading Spanish research facility in optoelectronics, is offering a position for a highly motivated postdoctoral researcher to contribute to a groundbreaking project funded by the European Research Council. The project... [+]
2025 PhD position: design, grow, characterize and process III-V semiconductor quantum dots for the development of single photon sources emitting at telecom wavelengths. Referencia UPM: HRS2025/131. The candidate will desing, grow, characterize and process III-V semiconductor quantum dots for the development of single photon sources emitting at telecom wavelengths. Design, grow, characterize and process III-V semiconductor quantum dots for the development of single photon sources emitting at telecom wavelengths.... [+]
2024 Ingeniero Electrónico. Diseño de un sistema de intercambio de claves cuánticas. En particular, el sincronismo del sistema mediante FPGAs y el diseño y montaje de las interfaces entre la FPGA y los elementos ópticos del sistema. Desarrollo de placas de circuito impreso, circuitos electrónicos y control de elementos electro-ópticos empleando arquitecturas digitales basadas en FPGAs.
Design of a quantum key exchange system. In particular, the synchronization of the system using FPGAs and the design and assembly of the interfaces between the FPGA and the optical elements of the system. Development of printed circuit boards, electronic circuits and control of electro-optical elements using digital architectures based on FPGAs. Diseño de un sistema de intercambio de claves cuánticas. En particular, el sincronismo del sistema mediante FPGAs y el diseño y montaje de las interfaces entre la FPGA y los elementos ópticos del sistema. Desarrollo de placas de circuito impreso, circuitos electrónicos y control de elementos electro-ópticos empleando arquitecturas digitales basadas en FPGAs. Design of a quantum key exchange system. In particular... [+]
2024 Andrea . Bachelor/APOSTROFE/s Degree in Materials Engineering (UPM), she did her final thesis on plasmonics in mid-infrared, under the supervision of Dr. Miguel Montes Bajo. Currently working as a research engineer on quantum well infrared photodetectors enhancement using plasmonic structures.
2024 Quantum key distribution system design. Research on the development and characterization of quantum key distribution systems. This includes the following activities: (i) studing theory of quantum information, (ii) studying quantum communication protocols (iii) QKD system design (iv) instrumentation in the field of optical fibers and high speed electronics (v) various optical and electrical measurements.
2024 Ainhoa. Research Scientist Assistant
Physicist (UCM) with a Master’s degree in Nanophysics and Advanced Materials from UCM. Currently, I am working as a research scientist assistant for the MADQuantum project.
2024 Development of novel Telecom single photon sources. Position for a highly motivated postdoc to contribute to a breakthrough project on the subject of quantum communications.
The student will have an official FPI grant from the Spanish Ministry of Science and Innovation, which includes funding for research stays in other institutions. He/she will do a minimum of 3 months in a renowned foreign research center and will obtain the International PhD Mention.
The student will work on developing novel semiconductor quantum dot structures for single photon emitters, a key component of the future quantum technologies that will revolutionize society. He/she will develop the nanostructures by molecular beam epitaxy (MBE) and will perform their structural and optical characterization by using atomic force microscopy (AFM), scanning electron microscopy (SEM), x-ray diffraction (XRD), and photoluminescence spectroscopy (PL).
REQUIREMENTS:
· A master in the area of nanophysics, advanced materials, semiconductors, nanophotonics or similar.
· A degree in: Physics, Electrical/Telecommunication/Material Engineering or in a similar area.
· Full professional competence in English.
· Ability to work both independently and collaboratively.
JOB CONDITIONS:
· Four-year contract.
· Annual Official FPI Gross Salary: 17.222 € (year 1), 18.452 € (year 2), 23.065 € (years 3 and 4).
· Work in a highly competitive international environment.
APPLICATION:
· Send a short CV, a short motivation letter and copy of your university degree certificate to Jose María Ulloa (jmulloa@isom.upm.es) or Sergio Fernández (sergio.fernandezga@upm.es)
2024 Development of novel Telecom single photon sources. The postdoc will work on the molecular beam epitaxy (MBE) of novel Sb-containing quantum dot architectures with emission at the telecom O and C-bands, as well as in the structural and optical characterization of the nanostructures. The work will take place within the framework of regional, national and European projects.
The research will be carried out at ISOM-UPM, but in close collaboration with groups providing state of the art transmission electron microscopy TEM (D.González, IMEYMAT-UCA) and quantum nano-optics simulation and characterization (J.M.Llorens and B.Alén, IMN-CNM-CSIC), as well as with renowned partners outside Spain.
2024 Development of novel Telecom single photon sources. Position for a highly motivated PhD student to contribute to a breakthrough project funded by Spanish Ministry of Science and Innovation on the subject of quantum communications
The postdoc will work on the molecular beam epitaxy (MBE) of novel Sb-containing quantum dot architectures with emission at the telecom O and C-bands, as well as in the structural and optical characterization of the nanostructures. The work will take place within the framework of regional, national and European projects.
The research will be carried out at ISOM-UPM, but in close collaboration with groups providing state of the art transmission electron microscopy TEM (D.González, IMEYMAT-UCA) and quantum nano-optics simulation and characterization (J.M.Llorens and B.Alén, IMN-CNM-CSIC), as well as with renowned partners outside Spain.
REQUIREMENTS:
A PhD in the area of semiconductor nanostructures, preferentially in the epitaxial growth and characterization of quantum dots for single photon emission.
A degree in: Physics, Electrical/Telecommunication/Material Engineering or in a similar area.
Full professional competence in English.
Ability to work both independently and collaboratively.
JOB CONDITIONS:
Two-year contract; extendable.
Annual Gross Salary: 30,000 € - 35,000 €; commensurate with experience.
Health and Social benefits included according to Spanish law.
Work in a highly competitive international environment.
APPLICATION:
Send a short CV, a short motivation letter and copy of your PhD and university degree certificate to Jose María Ulloa (jmulloa@isom.upm.es) or Sergio Fernández (sergio.fernandezga@upm.es)
2024 PEQWIP. Plasmonics-enhanced quantum well infrared photodetector: Plasmonic design and QWIP processing. .
2023 Postdoctoral Position (MBE quantum dots). Molecular beam epitaxy (MBE) growth of novel Sb-containing quantum dot architectures with emission at the telecom O and C-bands, as well as in the structural and optical characterization of the nanostructures.
ISOM UPM offers a postdoctoral position for a highly motivated postdoc with high academic performance, strongly determined to participate and contribute to a breakthrough project on the subject of quantum communications.
The candidate will work on the molecular beam epitaxy (MBE) growth of novel Sb-containing quantum dot architectures with emission at the telecom O and C-bands, as well as in the structural and optical characterization of the nanostructures.
The research will be carried out at the Institute for Optoelectronic Systems and Microtechnology (www.isom.upm.es) of Universidad Politécnica de Madrid, in collaboration with renowned partners inside and outside Spain.
2023 Dr Andreas Poppe talk on Advancements in Single-Photon Quantum Key Distribution. Advancements in Single-Photon Quantum Key Distribution: Exploring Research and Development Trends
Dr. Andreas Poppe will deliver an insightful talk on the implementation of quantum key distribution (QKD) schemes utilizing single-photon approaches. The discussion will delve into the significance of integrating quantum technologies into practical applications, shedding light on the most viable options for future implementations. Notably, the presentation will provide specialized insights into bridging the gap between diverse telecommunication modulation formats and various "flavors" of QKD. Additionally, it will cover the topic of QKD networks featuring trusted nodes.
The comprehensive coverage of these topics aims to foster an understanding of the prevailing research and development trends in the field of quantum communication networks.
Short biography
Dr. Andreas Poppe studied Telecommunication Engineering at the Vienna University of Technology, Austria, and earned his Ph.D. in 2000 for his contributions to the field of femtosecond lasers and frequency combs. Following the commercialization of his research outcomes, he joined the quantum cryptography project at the Institute of Experimental Physics (University of Vienna), led by Prof. Anton Zeilinger. Here, he conceptualized an entangled Quantum Key Distribution (QKD) system and played a key role in planning the QKD-network demonstration within the European project SECOQC.
From 2008 to 2015, Dr. Poppe served as a senior scientist at the Optical Quantum Technologies group of the AIT Austrian Institute of Technology, leading the QKD systems development team during this period. In 2015, he relocated to Munich, taking on the role of senior expert and leading the technical developments of an innovative Continuous Variable-QKD (CV-QKD) system at Huawei. In late 2019, he returned to AIT, undertaking the role of technical coordinator for the EU testbed project OpenQKD, geared towards preparing future QKD deployments. During this time, he also participated in EU-funded studies focused on preparing EuroQCI, encompassing both fiber-based and satellite-based components.
Since late 2022, Dr. Poppe has transitioned back to the industry and presently holds the position of "Head of QKD System Engineering" at Nutshell Quantum-Safe, an independent SME initiating new QKD development to address the evolving needs of future applications.
01/12/2023, 10:00, Salón de grados... [+]
2023 Development of novel Telecom single photon sources.
2023 David. MSc student on Electronics Systems Engineering (ETSIT-UPM) and BSc on Industrial Electronics & Automatics Engineering (ETSIDI-UPM).
Currently doing my master/APOSTROFE/s thesis and working on the design and development of an experimental quantum key distribution (QKD) node.
2023 MIRACLE: Quantum-engineered lattice-matched III-V-on-Si multijunction solar cells. HZ230920B222
