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Invited researcher Alexey Vitaliyevich Kavokin
Contract number
11.G34.31.0067
Time span of the project
2011-2015

As of 30.01.2020

38
Number of staff members
290
scientific publications
4
Objects of intellectual property
General information

Name of the project: Fundamental research of polariton systems based on semiconductor microresonators with quantum wells to develop and check principles of creation of optical memory cells and logic based on these systems

Strategy for Scientific and Technological Development Priority Level: a


Goals and objectives

Research directions: Semiconductor nanostructures and microresonators as base objects for new informatics devices

Project objective: Fundamental research of polariton systems based on semiconductor microresonators with quantum wells to develop and check principles of creation of optical memory cells and logic based on these systems


The practical value of the study

  • We have developed a unique experimental methodology for spin noise spectroscopy that allows to investigate behavior of nuclear spins inside crystalline substances. The method allows to conduct non-disturbing tomography of spin dynamics of paramagnetic media with optical resolution. The technique is applicable for non-contact vector magnetometry of external and internal magnetic fields in samples. Spin noise spectroscopy has been successfully applied for research of spatial and spectral correlations of spin ensembles including for research of statistical characteristics of the newest laser radiation source – polariton laser.
  • Our ream has produced a new type of lasers – boson cascade laser that emits submillimeter electromagnetic waves. These waves have a broad range applications in telecommunications and medicine. A normal laser is based on the effect of simulated radiation, i.e. on Bose-stimulation of optical transitions while in the proposed laser uses the effect of Bose-stimulation twice: for stimulation of optical transition with image and for formation of macroscopically populated emitter of state. This should significantly improve characteristics of boson lasers.
  • Our Laboratory has experimentally produced undamped ring current of superfluid light-liquids. The produced state is a macroscopic manifestation of quantum laws similarly of superconductivity and superfluidity. Thanks to its light-material nature the produced state has broad prospects for applications in quantum simulators and optical computers.
  • A new effect of long-lived optical memory in semiconductor structures has been discovered. It is based on writing information in spin systems using stimulated photon echo in magnetic field. In this method transfer of information from the optical field to the spin system occurs directly and using the effect of stimulated photon echo. Depending on experimental conditions and the choice the structure, information storage duration can vary from picoseconds to tens of nanoseconds.

Implemented results of research:

  • Two patents have been obtained for models: «An emitter of terahertz electromagnetic waves» and «A device for producing coherent terahertz electromagnetic waves».
  • Two patents applications have been registered for useful models as well as an application for a patent and an invention.

Education and career development:

  • We have developed 5 special courses for master and bachelor students: «Spin dynamics of semiconductor nanostructures», «Technique and computerization of optical experiments», «Electric characteristics of semiconductors», «Super-fast spectroscopy of semiconductor heterostructures», «Physics and technology of epitaxial systems».
  • The Laboratory has organized internships at the Laboratory for masters students and postgraduates.
  • 2 doctoral dissertations, 7 candidate dissertations, 12 masters dissertations have been defended.

Organizational and structural changes: We have furnished three cryogenic optics laboratories.

Other results:

  • Head of the Laboratory has been the chair and organizer of several scientific conferences as well as co-chair of the «Science of the Future – Science of the Youth» scientific forum.
  • The Laboratory annually conduct about 40 scientific seminars.

Collaborations:

  • TU Dortmund (Germany), Montpellier 2 University (France), University of Crete (Greece), Ioffe Physical-Technical Institute of the Russian Academy of Sciences (Russia): joint international projects and scientific publications- University of Southampton (United Kingdom): joint scientific research and publications
  • Westlake Institute for Advanced Study (China PR): joint scientific research

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Zapasskii V.S., Greilich A., Crooker S.A., Li Y., Kozlov G.G., Yakovlev D.R., Reuter D., Wieck A.D., Bayer M
Optical Spectroscopy of Spin Noise. Physical Review Letters 110(17): 176601 (2013).
Liew T.C.H., Glazov M.M., Kavokin K.V., Shelykh I.A., Kaliteevski M.A., Kavokin A.V.
Proposal for a Bosonic Cascade Laser Physical Review Letters 110(4): 047402 (2013).
Kavokin A., Lagoudakis P.
Exciton-Polariton Condensates: Exciton-Mediated Superconductivity. Nature Materials 15: 599–600 (2016).
Sim S., Lee D., Trifonov A.V., Kim T., Cha S., Sung J.H., Cho S., Shim W., Jo Moon-Ho, Choi H.
Ultrafast Quantum Beats of Anisotropic Excitons in Atomically Thin ReS2. Nature Communications 9(1): 351 (2018).
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