POISE · Physics of intersubband semiconductor emitters
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2004-10-01 → 2008-09-30
- EU contribution
- €2,311,558
- Participants
- 10
- Scheme
- RTN
Lines connect the coordinator with its partners. CORDIS does not always give exact coordinates for projects before 2014. These points are placed at city or country level.
Results in brief
Final Activity Report Summary - POISE (Physics of Intersubband Semiconductor Emitters)
The POISE Research Training Network brought together many of Europe's leading groups in the field of intersubb and semiconductor devices, particularly Quantum cascade lasers (QCLs). The aim of the network was to provide high quality training and networking within the framework of one of the most highly topical areas of modern semiconductor physics and technology. The research encompassed a range of fundamental and applied topics. Research highlights included the demonstration of high performance lasers in the 3 µm region, where numerous important spectroscopic and sensing applications exist, the demonstration of the first InP-based THz QCLs, the development of several innovative infrared devices based on non-linear optical processes, the demonstration of THz microresonator and photonic crystal QCLs and key advances in the physics of intersubband polaritons including the first demonstration of an intersubband polariton emission device. The network provided over 400 months of employment to early stage and experienced researchers, and provided a wide range of training and networking opportunities. Highlights in this area included the POISE summer schools (Cortona 2006, Monte Verita 2008), the latter of which was integrated with the International Workshop in Quantum Cascade Lasers providing maximum training benefit to the attending researchers, and the business / entrepreneurship workshop provided by Alpes Laser in Neuchatel, 2008.
Data: CORDIS, © European Union
Project objective
Recent years have seen spectacular advances in the performance and functionality of quantum cascade lasers (QCLs) based on intersubband transitions in III-V semiconductor quantum wells. There remain, however, a large number of relatively unexplored areas i n QCL research which offer the potential to raise performance to still higher levels, as well as shedding light on new areas of semiconductor device physics. For example, rapid non-radiative intersubband scattering by LO-phonon emission places fundamental limits on optical gain in current QCL designs, which could potentially be overcome by reducing dimensionality by application of high magnetic fields or by novel structures exploiting semiconductor quantum dots. Similarly, there is considerable need for a f ull understanding of the processes that lead to optical gain in THz QCLs, where the intersubband separation is below the LO phonon energy. The potential for short wavelength operation would be greatly enhanced by improved knowledge of the electronic parame ters of Sb-based heterostructure systems which could lead to the development of intersubband sources and modulators at telecoms wavelengths. Another exciting prospect arises from exploiting the non-linear optical properties of QCL structures to produce a w ide range of operating wavelengths by second harmonic and sum/difference frequency generation. Related studies of structures incorporating photonic crystal waveguides and/or exploiting surface plasmon effects also promise to lead to key advances in QCL fu nctionality. The proposed research training network brings together 9 European leaders in the fields of quantum cascade lasers and non-linear optics to form a coherent body of expertise which is strongly placed to investigate these fundamental areas which promise to underpin the next generation of QCLs and other intersubband devices. The proposed research programme will provide the focus for over 400 months of Early Stage and Experienced Researcher training.
Original text from CORDIS.
Participants
- UNIVERSITY OF SHEFFIELD · SHEFFIELDCoordinatorUnited Kingdom
- ALPES LASERS SA · NEUCHATELSwitzerland
- SCUOLA NORMALE SUPERIORE · PISAItaly
- SEMICONDUCTOR PHYSICS INSTITUTE · VILNIUSCity levelLithuania
- Technische Universität Wien · WienAustria
- UNIVERSITE DE NEUCHATEL · NEUCHATELSwitzerland
- UNIVERSITY OF MONTPELLIER II · MONTPELLIERCity levelFrance
- UNIVERSITÀ DEGLI STUDI ROMA TRE"" · ROMAItaly
- UNIVERSITÉ PARIS VII DENIS DIDEROT · PARISCity levelFrance
- University of Cambridge · CambridgeUnited Kingdom
Links
Data: CORDIS, © European Union