Research projectBulgarian National Research Fund
Optical and quantum-electronic elements and devices based on wedge-shaped interference structures for laser and optoelectronic technology, optical communications, metrology, and spectral analysis
The project covers three related topics: Development (concept, theory, experiment) of compact wedge interference structures with a composite architecture based on our scientific ideas and experience in the field of interference phenomena [1-5].
Category
Bulgarian National Research Fund
Program
National Science Fund
Number
BNSF No. DN 17/7
Coordinator
Prof. Marin Nenchev, D.Sc.
Duration
01.12.2017 - 01.05.2021
Funding
Fund "Scientific Research" at the Ministry of Education and Science
About the project
The project covers three related topics:
1.) Development (concept, theory, experiment) of compact wedge interference structures with a composite architecture based on our scientific ideas and experience in the field of interference phenomena [1-5]. A key aspect of their proposal is the development of the spectral-selective reflection specificity we discovered in single-layer wedge interference structures [2,3], enabling the structures to operate in both reflection and transmission. They will consist of a compact sequence of stacked wedge-shaped layers with partially reflecting surfaces and appropriately selected angles at the tips and thicknesses. The complex interference field will be modeled and studied for continuous-wave (CW) and pulsed radiation under illumination with both confined and broad beams. It is well-argued that the structures will possess significant useful properties: transmission/reflection in a selected single narrow-band (0.05 nm and less) resonance, tunable via translation within the structure's plane over a wide spectral range (30 nm and more), high compactness, and sheet-like form (1x4x0.2) cm;
2.) Related to the first, the second topic proposes an original set of composite structures in a parallel architecture, involving analysis and development. This will serve as the basis for creating new wave division multiplexing/demultiplexing elements (WDM) with fully independent tuning of each of their outputs/inputs without disturbing others, featuring controllable transmission and no unwanted losses during division;
3.) Using the new elemental base, the following will be created: original solutions for narrow-band multi-wavelength lasers and lasers with selection and smooth tuning of a single laser mode; an original method for purely optical control of a high-intensity laser beam using a low-intensity one – an optical analog of the electronic transistor with spectral tuning of the operating region. Modeling and studying the complex interference field in the proposed structures and during sequential reflections (WDM element) will contribute to fundamental technical scientific knowledge related to interference phenomena in complex structures and under various conditions. The expected new properties will form the scientific basis for a new elemental base for the aforementioned technologies.
The contract includes two stages, each lasting 18 months. The first stage has been completed and received a high evaluation. Work is ongoing on the second stage of the Contract, which is fully funded. The total amount of the Contract is 120,000 BGN, of which 54,000 BGN is directly allocated to TU-Sofia.
[1-5] M.Nenchev,E.Stikova,M.Deneva: 1.J.Opt.Soc.America,27,58 (2010); 2. Appl.Optics, 40, 27, 5402 (2001); 3,4 Opt.Quant.Electron, 27, 155 (1996); 47(10), 3253 (2015); 5.Rev.Sci.Instrum. 67, 1705 (1996)
1.) Development (concept, theory, experiment) of compact wedge interference structures with a composite architecture based on our scientific ideas and experience in the field of interference phenomena [1-5]. A key aspect of their proposal is the development of the spectral-selective reflection specificity we discovered in single-layer wedge interference structures [2,3], enabling the structures to operate in both reflection and transmission. They will consist of a compact sequence of stacked wedge-shaped layers with partially reflecting surfaces and appropriately selected angles at the tips and thicknesses. The complex interference field will be modeled and studied for continuous-wave (CW) and pulsed radiation under illumination with both confined and broad beams. It is well-argued that the structures will possess significant useful properties: transmission/reflection in a selected single narrow-band (0.05 nm and less) resonance, tunable via translation within the structure's plane over a wide spectral range (30 nm and more), high compactness, and sheet-like form (1x4x0.2) cm;
2.) Related to the first, the second topic proposes an original set of composite structures in a parallel architecture, involving analysis and development. This will serve as the basis for creating new wave division multiplexing/demultiplexing elements (WDM) with fully independent tuning of each of their outputs/inputs without disturbing others, featuring controllable transmission and no unwanted losses during division;
3.) Using the new elemental base, the following will be created: original solutions for narrow-band multi-wavelength lasers and lasers with selection and smooth tuning of a single laser mode; an original method for purely optical control of a high-intensity laser beam using a low-intensity one – an optical analog of the electronic transistor with spectral tuning of the operating region. Modeling and studying the complex interference field in the proposed structures and during sequential reflections (WDM element) will contribute to fundamental technical scientific knowledge related to interference phenomena in complex structures and under various conditions. The expected new properties will form the scientific basis for a new elemental base for the aforementioned technologies.
The contract includes two stages, each lasting 18 months. The first stage has been completed and received a high evaluation. Work is ongoing on the second stage of the Contract, which is fully funded. The total amount of the Contract is 120,000 BGN, of which 54,000 BGN is directly allocated to TU-Sofia.
[1-5] M.Nenchev,E.Stikova,M.Deneva: 1.J.Opt.Soc.America,27,58 (2010); 2. Appl.Optics, 40, 27, 5402 (2001); 3,4 Opt.Quant.Electron, 27, 155 (1996); 47(10), 3253 (2015); 5.Rev.Sci.Instrum. 67, 1705 (1996)