Partners

1) Université Paris Diderot – Paris 7 (UPD)

Staff: G. Leo, S. Ducci, S. Barbieri, C. Sirtori.

The University Paris Diderot – Paris 7 is the leading multidisciplinary University in France, gathering 26,000 students (including 2300 doctoral fellows), 1,800 academic staff and 102 research teams. UPD is characterised by its strong presence in all sectors (Sciences, Medicine, Social Sciences and Humanities). Its main focus has always been on excellence in research.

The University Paris Diderot – Paris 7 participates to TREASURE with the MPQ (Quantum Materials and Phenomena) Laboratory of the Physics Department. The MPQ “Materials and Quantum Phenomena” is an interdisciplinary research laboratory in the field of physics and engineering and it is a Joint Research Unit (Unité Mixte de Recherche) between “Centre National de la recherche Scientifique” (CNRS) and “Université Paris Diderot – Paris 7″ (UPD) (JRU 7162).

Two groups are involved within MPQ: DON (Nonlinear optical devices) and QUAD (Quantum physics and devices).

The scientists of DON are G. Leo and S. Ducci are active in the design, fabrication and characterization of integrated and nonlinear photonic devices. Their RTD involvement in TREASURE is threefold: (i) advanced electromagnetic modelling and design; (ii) characterization of integrated nonlinear optical devices; (iii) IR detection. G. Leo is also active in management and dissemination.

The scientists of QUAD are C. Sirtori and S. Barbieri. They are active in the beam-shaping and ultrafast modulation of THz QCLs, THz nonlinear up-conversion, and the development THz QCLs for high-temperature and long-wavelength operation. Within TREASURE, C. Sirtori (UPD) is involved in dissemination, while S. Barbieri (CNRS) is involved in RTD tasks of WP4 and WP5: modelling, design, and characterisation of semiconductor waveguides for THz generation.

Role in the Project

The main scientific contribution of UPD to the project is in the design and nonlinear optical characterizations of the MRs.

Profiles of staff members:

Prof. Giuseppe Leo. He received his Laurea degree (Summa cum Laude) in EE at the University La Sapienza of Rome in 1990, and his PhD diploma in Physics at the University of Paris-Sud in 2001. From 1992 he has been assistant professor in the Dept. of EE at Roma Tre University, where he has become associate professor in 2002. In 2004 he was appointed professor of the Faculty of Physics at Paris Diderot University. G. Leo’s research has been in optoelectronics and nonlinear optics, with a focus on AlGaAs and LiNbO3 integrated optics. His present interests are in optical parametric generation in AlGaAs heterostructures, microcavity and waveguide diagnostics, and electromagnetic modelling. He has published 55 journal papers, 5 book chapters and 65 conference papers, given many presentations at major international conferences, and registered 1 patent. He is an OSA member and a referee for many journals of Optics and Physics.

Prof. Sara Ducci. She received her Laurea degree (Summa cum Laude) and her PhD diploma in Physics at the University of Florence, Italy. From 2002 she has been Assistant Professor at the Université Paris Diderot (France), where she has become Full Professor in 2008. Her research activities have been in pattern formation in nonlinear optical systems and spatial quantum correlations in optical parametric oscillators. Her present interests are focused on optical parametric generation in AlGaAs heterostructures, waveguide diagnostics and twin photon sources. She has published 26 papers in international journals, 4 book chapters and 45 conference papers. She is referee for journals like Physical Review Letters, Physical Review A and Applied Physics Letters. She is at the head of the Master course ‘Physics and Engineering of Quantum Devices’ at the University Paris Diderot.

Prof. Carlo Sirtori. After his doctorate degree in physics at the University of Milan in 1990, he joined Bell Labs where he started his research carrier on quantum devices. During the 7 years spent at Bell Labs, he made important contributions such as the invention and the development of the QCL. In 1997, he left Bell Labs to join the LCR of Thomson-CSF (currently Thales Research & Technology, TRT). In 2000 he was named head of the “Semiconductor Laser Group” and responsible of the clean room at TRT for the development of semiconductor lasers in the near- and mid-IR. During these years his research focused on the demonstration of innovating devices such as the first quantum cascade laser in the GaAs/AlGaAs material system, the first Sb-based QCLs and the development of plasmonic waveguides for GaAs. In 2002, he was appointed Professor at Paris Diderot University. Prof. Sirtori has authored >160 articles in peer-reviewed journals, given > 50 invited talks at international conferences, and received several awards such as the Fresnel Prize (EPS). In 2006 he was rewarded by the “quantum devices award” sponsored by the APS.

Dr. Stefano Barbieri. After his Laurea degree (Summa cum Laude), in 1996 he begins his PhD at Scuola Normale Superiore (Pisa) and Thomosn-LCR (Orsay). In 2000-2002 he is Research Scientist at Orbisphere (Geneva), and in 2002 he joins TeraView (Cambridge) as Group Leader of the Quantum Devices Team and coordinates R&D in collaboration with the Cavendish Lab. The realisation of high-performance QCLs and their use to perform imaging based on direct detection and heterodyne mixing are among his main achievements. In 2004, he is awarded a 3-year Industry-fellowship from the Royal Society. In 2005, he becomes 1st class research scientist at CNRS in France, where he is now in charge of THz research at the Paris Diderot University, focusing on high frequency modulation and beam shaping of THz QCLs, and nonlinear mixing. Dr. Barbieri has authored >30 journal papers, has given several invited talks at international conferences, and holds 4 patents.

2) Julius-Maximilians Universitaet Wuerzburg (UW)

Staff: M. Kamp, S. Höfling, S. Reitzenstein

The chair for ‘Technische Physik’ at the Universität Würzburg has become a leading centre for technology and characterization of novel III – V materials and related nanophotonic and nanoelectronic devices during the last decade. The group operates a clean room (Microstructure Laboratory) with a total area of 550m2. A complete technology chain for III-V semiconductor processing is available, ranging from dedicated MBE systems for quantum dot and quantum well heterostructure growth in different material systems to high resolution electron beam systems, high resolution TEM, FIB systems, dry etching systems, metallization systems etc. The main research topics are related to studies of low dimensional semiconductor systems, including work in the field of nanoelectronic and optoelectronic devices, nanophotonics and semiconductor quantum optics.

Julius-Maximilians Universitaet Wuerzburg participates to TREASURE with the facilities of the ‘Technische Physik’ and the associated microstructure laboratory of the Physics Department. The group has world leading know-how in the epitaxy and processing of pillar based quantum dot microcavity structures.

Role in the Project
The main scientific contribution of UW to TREASURE is in the growth and processing of quantum dot WGM lasers for room temperature operation in the NIR spectral range. UW characterizes the WGM lasers by means of optical spectroscopy.

Profiles of staff members:

Martin Kamp, studied physics at the University of Würzburg and spent one year at Stony Brook University, USA, where he obtained a ‚Master of Arts‘ degree. He received his Ph.D. degree in 2003 in Würzburg for his work on ‘Semiconductor lasers with lateral feedback structures‘. Currently he is in charge of the Nanophotonics group of the Technische Physik in Würzburg. Martin Kamp is author or coauthor of more than 100 papers relating to semiconductor nanostructures and optoelectronic devices. His current research interests include the development of high-speed and high-brightness semiconductor lasers, complex coupled DFB lasers, photonic crystals and their applications.

Sven Höfling, studied Applied Physics at the University of Applied Science in Coburg, Germany. As a student he spent one year at the Fraunhofer-Institute of Applied Solid-State Physics, Freiburg, Germany and half year at LG Laser Technologies GmbH, Kleinostheim. In 2003 he joint Technische Physik, Würzburg, Germany for his PhD studies on growth and characterization of GaAs based quantum cascade lasers. He is currently head of the epitaxial growth group of the Microstructure Laboratory and he has authored or co-authored more than 50 papers in peer-reviewed journals related to semiconductor technology and devices. His current research is concerned with the design, growth and characterization of low dimensional electronic and photonic nanostructures.

Stephan Reitzenstein, studied physics at the University of Würzburg. His scientific activities focus on the study of low dimensional semiconductor nanostructures. During his diploma and doctoral studies, transport properties of quasi one dimensional current channels were investigated. At present, he is leader of the III-V spectroscopy group and his scientific activities are directed towards optical studies of semiconductor nanostructures like nanowires and quantum dots. In this field, the main research is on the study of quantum optical effects in single quantum dot-cavity systems and their applications in optoelectronic devices. Dr. Reitzenstein has co-authored more than 50 journal papers and has given several invited talks at international conferences.

3) Commissariat à l’Energie Atomique (CEA)

Staff: J. Claudon, J.-M. Gérard, J. Bleuse, M. Ducruet

The TREASURE project involves CEA through the participation of scientists from the team ‘NanoPhysique et SemiConducteurs’ (laboratory ‘Service des Matériaux et Microstructures’ (SP2M) of the ‘Institut Nanoscience et Cryogénie’ (INAC)). The group, headed by Jean-Michel Gérard, is very active in the design, fabrication and study of advanced III-As optoelectronic devices based on cavity quantum electrodynamics effects or original one dimensional active photonic systems.

The know-how of the team relevant to the TREASURE project is the following:

(i) It is involved in the modelling and design optimisation of cavity-based devices. Considering recent achievement, CEA designed the doped micropillar cavity for the realization of an electrically pumped QD-cavity system displaying a record Purcell factor (=10) [53]. CEA also showed recently that WGMs in microcylinders are accuretely described within the EIM approximation (mode spatial structure and resonant frequency) [27].

(ii) CEA also possesses a recognized microfabrication expertise. In particular, the team has recently realized an original single-photon source presenting a record high efficiency of 72% based on a photonic wire relying on a gold mirror [43]. Along this work, CEA developed a know-how in flip-chip processes, an essential step of the TREASURE source microfabrication. The high aspect ratio of photonic wires (10µm high and 250nm in diameter), is also highly demanding in terms of plasma dry etching optimisation.

Role in the Project

The main scientific contribution of CEA to TREASURE is twofold: i) advanced modelling of the TREASURE source, to achieve high power lasing in the near IR WGMs at room temperature and ii) fabrication of the TREASURE device, in collaboration with UW. Along fabrication optimisation, CEA also participates to the optical characterization of the WGM lasers by means of optical spectroscopy.

Profiles of staff members:

Dr. Joël Bleuse. He was a student  at the “Ecole Polytechnique” (Palaiseau, France) from 1982 to 1985, then began a PhD at Paris-VI university in September, 1986, after a Master on Solid State Physics. He obtained his PhD, which was devoted to the study of “Electro-Optical Effects in Semiconductor Superlattices”, in December, 1988. After one post-doctoral year at the University of Illinois at Chicago, in the group of Pr. Jean-Pierre Faurie, where he studied mid-infrared laser heterostructures based on CdHgTe, he joined, as a research scientist, the “Physique des Semiconducteurs” group, at CEA-Grenoble (France), in January, 1990. There, he worked on the doping of II-VI semiconductors; on CdHgTe, mid-infrared laser heterostructures; on microcavity-based, mid-infrared light emitters; on microcavity polaritons in Te-based heterostructures, where he was the first to observe non-linear emission from such objects, in 1997. His work shifted then, for a few years, to the optics of colloidal nanocrystals, before coming back to MBE-grown heterostructures, his current interests going to InAs-quantum dots in photonic structures as emitters of single photons. Dr. Bleuse is the co-author of about 50 scientific articles, and 3 patents.

Dr. Julien Claudon. After his studies at the ‘Ecole Normale Supérieure de Lyon’ (Lyon, France), he begins in 2002 his PhD at the ‘Université Joseph Fourier’ (Grenoble, France) in the ‘Centre de Recherches sur les Très Basses Températures’ (Grenoble, France, now ‘Institut Néel’). In this experimental work, various aspects of the physics of a quantum superconducting Josephson circuit (a dc SQUID) were investigated: macroscopic quantum tunnelling, coherent manipulation of the circuit state and decoherence processes. In 2005, he starts a 1 year postdoc in the ‘Laboratoire de Spectrométrie Physique’ (Grenoble, France) to develop a single-photon superconducting detector for the near infrared. In 2006, he becomes a research scientist at CEA and joins the ‘Nanophysique et Semiconducteurs’ team of the ‘Intitut Nanoscience et Cryogénie’ (Grenoble, France). He works in the field of quantum optoelectronic devices (microlasers, single-photon sources…) with a current interest in the control of the spontaneous emission of semiconductor quantum dots by optical microcavities and one-dimensional photonic structures. Dr. Claudon has co-authored 15 journal papers, 6 conference papers and 2 patents.

Dr. Jean-Michel Gérard,. After his studies at the ‘Ecole Polytechnique’ (Palaiseau, France), he obtains in 1990 a PhD from Paris VI University (France). From 1990 to 2000, he is a researcher at France Telecom R&D/CNET (France). From 2001 to 2005, he is head of the “Nanophysics and Semiconductors” Laboratory of CEA Grenoble (France). Since 2006, he is head of the “Service for Materials and Microstructures Physics” of CEA Grenoble. His research activities have been essentially devoted to the development and optical study of semiconductor micro/nanostructures, such as quantum wells, quantum dots and optical microcavities. He gave in particular a major contribution to the development of self-assembling techniques for epitaxial quantum dots and has introduced with his colleague J.Y. Marzin the optical spectroscopy of single quantum dots. More recently, his activity has been focused on the realization of quantum optics experiments in solid state systems, by using quantum dots as “artificial atoms”. In this context, he has studied in particular the generation of quantum states of light by single quantum dots, and demonstrated that optical microcavities can be used to tailor to a large extent the spontaneous emission of quantum dots (Purcell effect, strong coupling regime). His main present research topic is the development of advanced optoelectronic devices based on CQED effects such as single mode single photon sources and microlasers. He has authored and coauthored more than 200 papers (H=38), 10 patents, and presented more than 50 invited presentations at international conferences and summer schools. He has been awarded the “Grand Prix fondé par l’Etat” by the french Academy of Sciences in 2005, and the “Quantum Devices Award” (founded by Fujitsu Corp) in 2008.

Marion Ducruet. She obtained a ‘Diplome Universitaire de Technologie’ and Bachelor of Applied Physics from Joseph Fourier University (Grenoble, 1996). Since 1997, Marion Ducruet is a member of the technical staff of the ‘Service de Physique des Matériaux et des Microstructures (SP2M)’ (‘Institut Nanoscience et Cryogénie’, CEA Grenoble). As a member of the team ‘Nanostructure et Rayonnement Synchrotron’, she has spent 10 years at the European Synchrotron Radiation Facility, on the ‘Interface BM32’ Beamline. She was the technician in charge of an experiment dedicated to the in-situ study of molecular beam epitaxy (MBE) growth mechanisms by grazing incidence x-ray diffraction. In 2008, she joins the team ‘Nanophysique et Semiconducteurs’ of the SP2M and is in charge of the MBE growth of III-V semiconductor structures. She is an expert of ultra-high vacuum systems, surface analysis and semiconductor MBE growth. Marion Ducruet has co-authored 5 journal papers in peer-reviewed journals.

4) Danmarks Tekniske Universitet (DTU)

Staff: P. U. Jepsen, D. G. Cooke, D. Turchinovich

The Technical University of Denmark (DTU) participates to TREASURE with the research group Terahertz Technologies and Biophotonics. The group focuses on (i) ultrafast measurement techniques in the THz frequency range, (ii) generation of broadband, high-intensity THz radiation, (iii) ultrafast spectroscopy of semiconductor nanostructures, (iv) studies of conductivity in the THz range, (v) studies of ultrafast relaxation processes in liquids, and (vi) active THz imaging systems. The expertises of the group that are most relevant for the TREASURE project are full 3D modelling capabilities of propagation of electromagnetic radiation at THz frequencies, and capabilities to perform broadband THz transmission and emission spectroscopy.

Role in the Project
The main scientific contribution of DTU to TREASURE is in design and modelling of the coupling between free-space THz radiation and modes of the TREASURE device, and design and modelling of multi-wavelength emitter array configurations.

Profiles of staff members:

Peter Uhd Jepsen, is Professor and Head of the Terahertz Technologies and Biophotonics research group, and is the Head of the research cluster Dynamic Photonics at DTU Fotonik – Department of Photonics Engineering. He has worked in the field of THz technology since 1992. He obtained the Ph.D. degree in 1996, and was first postdoc and later Assistant and Associate Professor at the University of Freiburg, Germany, where he was in charge of the THz research group at the Institute of Mathematic and Physics. In 2005 he moved to the Technical University of Denmark as Associate Professor, and in 2008 he was appointed Professor. Peter Uhd Jepsen is interested in the development of THz technology for real-world applications, exemplified by his development of new THz detection schemes (free-space electro-optic sampling), chemical recognition techniques based on THz spectroscopy, techniques for identification of liquids inside bottles, and concepts for THz wireless communication. Within the last 5 years Peter Uhd Jepsen has been principal investigator on two EU projects (THz BRIDGE and TERANOVA) as well as two projects with ESA and one project with the German Federal Ministry of Education and Research (BMBF). He has authored or co-authored more than 40 peer-reviewed articles about THz Science and Technology, 2 pending patents, 3 book chapters, and numerous invited talks at the leading international conferences. He has an H-index of 19, and has been cited more than 1400 times (ISI Web of Science, September 2009).  

David Cooke, is Assistant Professor in the Terahertz Technologies and Biophotonics research group at DTU Fotonik, Technical University of Denmark. He received his Ph.D. in 2006 from University of Alberta, Canada in condensed matter physics, and moved to DTU as a postdoc. In 2007 he was granted the H. C. Ørsteds postdoctoral fellowship and was promoted to Assistant Professor in 2008. In late 2009, he will assume the position of Associate Professor. His scientific interests lie in the development of THz science and technology, including novel methods of controlling THz light and using THz pulses to investigate the ultrafast conduction properties of semiconductors and their nanostructures. He has published 15 peer-reviewed articles, 2 book chapters and given several invited talks at international conferences on THz science and technology. His H-index is 9 and he has been cited more than 180 times (ISI Web of Science, Sept. 2009).

Dmitry Turchinovich, , is Assistant Professor at DTU Fotonik. Dmitry Turchinovich studied physics and electrical engineering at the St. Petersburg State Electrotechnical University and Ioffe Institute, where he obtained his B.Sc. and M.Sc. degrees in Engineering and Technology in 1997 and 1999, respectively. After graduation from the University, he received the Gottlieb Daimler- und Karl Benz – Stiftung scholarship to fund his stay at the Institute of High Frequency Engineering, Technical University of Braunschweig in 1999-2001. Since 2001 Dmitry Turchinovich conducted his doctoral project at the Department of Molecular and Optical Physics, University of Freiburg, where he finally obtained his Ph.D. (Dr. rer. nat.) degree in 2004. In 2005-2006 he worked as a post-doc at Debye Institute, Utrecht University. Since October 2006 Dmitry Turchinovich is working at DTU Fotonik as a Postdoc, Assistant Professor, and (from October 2009) Associate Professor. His research interests belong to the field of Ultrafast dynamics in semiconductors and optical fibers. He is author or coauthor of 15 peer-reviewed papers and 1 book chapter on optics and optoelectronics of semiconductor quantum wells and quantum dots, THz technology, and optical fiber technology. He has 2 patents (1 published and 1 pending) in the field of THz technology and THz telecommunications.

5) Alpes Lasers (AL)

Staff: A. Muller, S. Blaser and T. Gresch

Alpes Lasers is responsible for coordinating WP6 on dissemination and exploitation as well as collaborating to WP5 aimed at incorporating the device into a industry compatible package and test the resulting device.

The research group at AL  is not involved in any other EU project.

Role in the Project

The main scientific contribution of AL to TREASURE is an expertise in THz generation, as well as its ability to point out opportunities for practical applications of THz wave in an industrial domain.

Profiles of staff members:

Dr. A. Muller, is presently CEO of Alpes Lasers. Antoine studied Solid State Physics at the University of Geneva, he received a PhD in Physics in 1995 for his work in Quantum Cryptography with Professor N Gisin. In 1996 he continued work as post doctorate on the same subject at the University of Geneva. In 1997, he worked on single photon metrology at NIST in Gaithersburg, MD and in 1998 he joined Professor Faist’s group of mesoscopic physics at the University of Neuchâtel to work on electrical tuning in QCLs. In 1998 he founded Alpes Lasers SA together with Professor Faist and Dr. Beck, he acts as CEO since foundation. He co-authored more than 30 peer reviewed papers or contributions to topical meetings and 7 granted patent and patent applications. In the course of business he attended and completed successfully various courses on entrepreneurship and marketing and organized an entrepreneurship awareness workshop aimed at the doctorate students of POISE RTN.

Dr. Stéphane Blaser, studied physics at the University of Neuchâtel, Switzerland, and he received the M. S. degree in physics in 1997, and the Ph.D. degree in 2002 in the group of Prof. Jérôme Faist, from University of Neuchâtel. His studies were focused on magneto-spectroscopy of intersubband transitions in the mid- to far-infrared region, particularly on quantum-cascade structures based on photon-assisted tunneling transition. He is with Alpes Lasers SA since 2002, where his work is concentrated on the development of continuous-wave quantum-cascade lasers. His position in the company is presently Production Manager. He is author or co-author of more than 20 peer-reviewed journal papers and various contributions to topical meetings.

Dr. Tobias Gresch, obtained a master in physics from University of Neuchâtel in 2003. He will defend his PhD thesis in November 2009 and has been hired at Alpes Lasers SA as a process design manager in september 2009. He is author of more than 15 peer reviewed papers and conference presentations.

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Hired people

A PhD student is partially funded by the TREASURE project:
- Silvia Mariani

Also funded by TREASURE project is the Project Manager at Paris Diderot University:
- Anne-Sophie Refloc'h

A post doc is being funded by the TREASURE project at Julius-Maximilians Universitaet Wuerzburg:
- Fabian Langer

Conferences

The TREASURE consortium organises:
a workshop session dedicated to electrically-injected nonlinear THz emitters at 300K, within the 7th Terahertz days and GDR-I workshop to be held in Cargèse, Corsica, France, 25-27 March 2013

The TREASURE consortium attended:

7th Optoelectronics & Photonics School, 16-22 March 2013, Trento, Italy

NLO 50 International Symposium, 8-10 October 2012, Barcelona, Spain, "AlGaAs micropillars for THz DFG"

IEEE International Semiconductor Laser Conference San Diego, USA, 7-10 October 2012, "Room Temperature, Continuous Wave Lasing in Microcylinder and Microring Quantum Dot Laser Diodes"

Nonlinear Optics, 17-21 June 2012, Colorado Springs (Colorado), United States, "Optical Characterization of Nonlinear THz Emitters"

3rd EOS Topical Meeting on Terahertz Science & Technology (TST 2012), 17 -20 June, 2012 Prague, Czech Republic (Poster Presentation)

Industrial Exhibits

The TREASURE consortium attended:

International Quantum Cascade Lasers School & Workshop 2012, September 2-6, 2012, Baden bei Wien, Austria.

Future Security, Security Research Conference, September 4 – 6, 2012, Bonn, Germany.

Pittcon 2012, Orlando, FL from 11 March to 15 March 2012. Major new products and technologies in the field of analytical and laboratory instruments.

Laser Applications to Chemical Security and Environmental (LACSEA), 29 January - 1 February 2012, Rancho Bernardo Inn, San Diego, California, United States

SPIE Defense Security & Sensing, "International Defense, Security & Sensing Exhibition", April 23-27 2012, Baltimore, United States

Swiss NanoConvention 2012, “the prime showcase for nanotechnology in Switzerland”, Lausanne May 23rd 2012, Lausanne, Switzerland

FLAIR 2011 - Field Laser Applications in Industry and Research / September 13-17, 2011, Conference Center, Murnau, Germany

10e Rencontres HélioSpir, September 24, 2011, Montpellier, France

LASER World of PHOTONICS, May 23-26, 2011 Munich, Germany

"Alliance" organization was visited in order to prepare a technology offer on the "Enterprise Europe Network"