Fundamental Research ON TERAhertz Photonic Devices
Calls: Futuro in ricerca 2010
Start date: 2012-03-07 End date: 2015-09-07
Total Budget: EUR 852.400,00 INO share of the total budget: EUR 392.188,00
Scientific manager: Miriam Serena Vitiello and for INO is: Bartalini Saverio
Organization/Institution/Company main assignee: CNR – Dipartimento Materiali e Dispositivi
other Organization/Institution/Company involved:
CNR – Istituto Nanoscienze
Laboratorio NEST – National Enterprise for nanoScience and nanoTechnology
Quantum cascade lasers can have a real impact in technological applications such as homeland security, pollution monitoring, process control, countermeasures and clinical diagnostics. In this aspect they also have a huge potential for improvements in the quality of life. In addition to applications, there is considerable interest in intersubband processes and related optoelectronic phenomena from a fundamental physics viewpoint.
The present proposal will make a step-change in the research on THz quantum cascade laser (QCL) and related fundamental physical phenomena. We plan to improve the laser performance in order to come up with advanced devices and novel set-ups based on non-linear optical techniques employing advanced models for the understanding of the physics of intersubband emitters. In addition through ground-breaking research on both the fundamental and applied aspects of THz QCL
design and implementation, we will develop the next generation of QCL technology that is defined by, and can be employed by the European Photonics platform.
The proposal will be built on these foundations to explore new physical concepts, towards enhancing the performance, the functionality, the stabilization and the integration with novel optical components (high efficiency waveguides and nano-structured detectors) of compact semiconductor THz sources via a collaborative research across a broad range of disciplines including: advanced nano-fabrication, high resolution spectroscopy, optical metrology, holographic imaging, non-linear optics and advanced solid state theory.
The major aim of the research proposal is the development of:
i) reliable THz QCL devices operating at Peltier cooler temperatures, with progressively higher output powers, quantum efficiency, tunability;
ii) THz QCL with high directional beam profiles, coupled with high efficiency and low transmission losses to THz optical waveguides;
iii) Nano-structured detectors in a single pixel or array configuration coupled with high peak power THz QCLs;
iv) Optical set-ups aimed to holographic imaging experiments in the far infrared;
v) New optical set-ups based on high-resolution THz spectroscopy and non-linear up-conversion techniques enabling ultra-narrow, metrological-grade THz
vi) Original advanced models for the understanding of the physics of intersubband phenomena.
The successful achievement of the project objectives aims to the establishment of an Italian scientific network of excellence in the field of innovative THz sources that will play a strategic role for the Italian and European technological progress, in application fields as homeland security, cultural and environmental heritage and medial diagnostics
INO’s Experiments/Theoretical Study correlated:
Synthesis of terahertz frequencies by optical frequency mixing
Cavity-enhanced THz molecular spectroscopy