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15.817.02.22F. Thermoelectric and optical properties of nanostructured materials and of devices with quantum dots / Proprietăţile termoelectrice şi optice ale materialelor nanostructurate şi dispozitivelor cu puncte cuantice

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Primary Data

Project title
15.817.02.22F. Thermoelectric and optical properties of nanostructured materials and of devices with quantum dots / Proprietăţile termoelectrice şi optice ale materialelor nanostructurate şi dispozitivelor cu puncte cuantice
Code
15.817.02.22F
Project Coordinator
Status
finished
Start date
01-01-2015
Expected Completion
31-12-2019
 

Description

Abstract
Investigation of nanostructured and with quantum dots materials is an important and urgent problem of solid state physics. The project objectives consist in: 1) optimization of the thermoelectric efficiency in organic nanostructured crystals with increased electrical conductivity; 2) investigation of dynamics of quantum dot semiconductor lasers under the influence of different types of optical feedbacks; 3) elaboration of recommendations for realization of optimal parameters in practice. Thermoelectric converters have evident advantages with respect to the classical ones, but in present the efficiency of these devices is low and the cost is high. New materials are needed that would have greater possible thermoelectric efficiency. Our previous investigations have permitted us to prepare and to win in a strong competition two scientific international projects: STCU 5344 (2012-2014) and FP7 (2013-2015) together with several foreign scientific teams. Now the necessity has appeared to investigate the thermoelectric efficiency in a most more strongly manner and to optimize her values in the nanostructured organic crystals of p and n type. A more complete physical model for these crystals will be developed. Investigation of lasers with quantum dots will provide a platform for efforts to design devices with properties and performance that are attractive for practical applications in the chaos based communication systems. In particular, the phenomena of chaos and synchronization in quantum dot lasers will be investigated, and the device properties will be compared with those of quantum well and bulk lasers. The most modern methods of theoretical investigation, of modeling and of optimization on computer will be applied. The optimal values of the crystal parameters will be obtained in order to achieve the optimal value of the thermoelectric efficiency. It will be also investigated the influence of optical feedback as its level varies from weak to strong. New photonic integrated circuits will be developed for the realization of chaotic setups of transmitters and receivers. Different types of transmitter/receiver configurations will be investigated in order to enhance the security of transmission of information. The recommendations will be elaborated for implementation of these parameters in practice. The results will serve to prepare three doctor dissertations and one of master and to present for competition new international projects.
 

Publications
(All)

Results 1-6 of 6 (Search time: 0.003 seconds).

Issue DateTitleAuthor(s)
12019The dynamic behavior of quantum dots laser under the influence of external optical feedback from five external cavitiesOLOINIC, Tatiana 
22019Effect of PEIERLS transition on the phonon spectrum in organic crystals of TTT2I3 for different values of carrier concentrationANDRONIC, Silvia ; CASIAN, Anatolie ; SANDULEAC, Ionel ; BALMUS, Ion 
32019Investigation of picosecond-pulse generation by two-section blue-violet semiconductor lasersTRONCIU, Vasile ; Wenzel, Hans ; KNIGGE, Andrea 
42019Peierls structural transition in organic crystals of the TTT2I3 type in a 2D approximationANDRONIC, Silvia ; CASIAN, Anatolie 
52019Quantum treatment of self-organization phenomena of excitons and biexcitonsCIOBANU, NELLU ; ROTARU, Anatol ; GONTIA, Ilarie ; TRONCIU, Vasile 
62019Theoretical studies of the dynamics of two section blue-violet semiconductor lasersTRONCIU, Vasile