Mr. Alexei Katsnelson Profile

Alexei Katsnelson

at SUNY/Univ at Albany

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Author

Publications (5)

Proceedings Article | 7 March 2005 Paper

Oxidation lift-off technology

Serge Oktyabrsky, Michael Yakimov, Vadim Tokranov, Jobert van Eisden, Alexei Katsnelson

Proceedings Volume 5730, (2005) https://doi.org/10.1117/12.591112

KEYWORDS: Vertical cavity surface emitting lasers, Aluminum, Silicon, Gallium arsenide, Metals, Epitaxial lateral overgrowth, Etching, Gallium, Oxides, Oxidation

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Proceedings Article | 11 May 2004 Paper

Nanoengineered InAs quantum dot active medium for laser diodes

Vadim Tokranov, Michael Yakimov, Alex Katsnelson, Matthew Lamberti, Gabriel Agnello, Serge Oktyabrsky

Proceedings Volume 5365, (2004) https://doi.org/10.1117/12.529717

KEYWORDS: Gallium arsenide, Semiconductor lasers, Indium arsenide, Transmission electron microscopy, Quantum dots, Vertical cavity surface emitting lasers, Laser damage threshold, Superlattices, Luminescence, Arsenic

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Proceedings Article | 1 July 2003 Paper

Shape Engineered InAs Quantum Dots with Stabilized Electronic Properties

Vadim Tokranov, Michael Yakimov, Alex Katsnelson, Matthew Lamberti, Serge Oktyabrsky

Proceedings Volume 4999, (2003) https://doi.org/10.1117/12.477795

KEYWORDS: Indium arsenide, Gallium arsenide, Semiconductor lasers, Transmission electron microscopy, Laser damage threshold, Quantum dots, Temperature metrology, Scanning electron microscopy, Optical properties, Laser stabilization

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Proceedings Article | 30 May 2003 Paper

Hybrid integration of III-V optoelectronic devices on Si platform using BCB

Alexei Katsnelson, Vadim Tokranov, Michael Yakimov, Matthew Lamberti, Serge Oktyabrsky

Proceedings Volume 4997, (2003) https://doi.org/10.1117/12.479453

KEYWORDS: Silicon, Vertical cavity surface emitting lasers, Gallium arsenide, Etching, Optoelectronic devices, Semiconducting wafers, Polymers, Wet etching, Photodetectors, Metals

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Inadequate performance of interconnects in emerging integrated circuitry has generated a need for alternative signal transmission solutions. Integration of dense arrays of high frequency III-V photoemitters and photodetectors with Si platform is one of the challenging tasks. Comparison of monolithic and hybrid integration technologies highlights the advantages of hybrid approaches at least for emitters highly sensitive to growth defects. A novel protocol for fabrication of III-V optoelectronic components such as LEDs, VCSELs and photodetectors on Si platform is proposed. The simulations of thermal behavior and mechanical stresses of this integration scheme was performed using finite element analysis and revealed adequate heat dissipation. Simulations show that this protocol allows to reduce overheating and mechanical stresses to enhance the optoelectronic devices performance and increase their lifetime. The III-V structures are grown homoepitaxialy on GaAs substrate, then bonded to a Si wafer using low-temperature polymer followed by wet etching of the substrate. The scheme involves VCSEL processing with coplanar metallization on Si with PMGI reflow planarization. MBE-grown reversed VCSEL structure was used for manufacturing of the test devices using this novel protocol. An AlAs etch stop layer was imbedded into the structure. 10 um thick VCSEL structure was bonded on Si using BCB (CycloteneTM). Substrate was completely removed by selective etching to reduce thermal stresses to enhance the optoelectronic devices performance and increase their lifetime. The array of the 3D devices was fabricated using wet etching. A 10 um-thick high frequency VCSEL with coplanar metallization is processed on Si with PMGI reflow planarization. Electro-luminescence spectrum, I-V and P-T characteristics were measured and compared with a reference structure. It was found that measured thermal impedance is about five times higher than for devices on a host GaAs wafer. Simulation of thermal behavior was done for bonded and non-bonded structure. It was found that measured values of thermal impedance are in good agreement with simulation results.

Proceedings Article | 28 March 2002 Paper

InAs quantum dot laser diodes: structure, characteristics, and temperature dependence

Vadim Tokranov, Michael Yakimov, Alex Katsnelson, Katharine Dovidenko, Rene Todt, Serge Oktyabrsky

Proceedings Volume 4656, (2002) https://doi.org/10.1117/12.460804

KEYWORDS: Indium arsenide, Gallium arsenide, Semiconductor lasers, Transmission electron microscopy, Quantum wells, Laser damage threshold, Luminescence, Gallium, Cladding, Electroluminescence

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