Search Results - "DEMS, M"

Monolithic high-index contrast grating: a material independent high-reflectance VCSEL mirror by Gębski, M, Dems, M, Szerling, A, Motyka, M, Marona, L, Kruszka, R, Urbańczyk, D, Walczakowski, M, Pałka, N, Wójcik-Jedlińska, A, Wang, Q J, Zhang, D H, Bugajski, M, Wasiak, M, Czyszanowski, T

“…In this paper we present an extensive theoretical and numerical analysis of monolithic high-index contrast grating, facilitating simple manufacture of compact…”
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Variation of additional losses at no-load and full-load for a wide range of rated power induction motors by Dems, M., Komeza, K., Lecointe, J-Ph

“…•Additional core losses are strongly dependent on the load of the motor.•The reason is the saturation of rotor tips which leads to an increase of the effective…”
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ITO layer as an optical confinement for nitride edge-emitting lasers by Kuc, M, Sokół, A K, Piskorski, Ł, Dems, M, Wasiak, M, Sarzała, R P, Czyszanowski, T

“…This paper presents the results of a numerical analysis of nitride-based edge-emitting lasers with an InGaN/GaN active region designed for continuous wave room…”
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Continuously tunable Yb:KYW femtosecond oscillator based on a tunable highly dispersive semiconductor mirror by Wnuk, P, Wasylczyk, P, Zinkiewicz, Ł, Dems, M, Hejduk, K, Regiński, K, Wójcik-Jedlińska, A, Jasik, A

“…The optimized nonuniform growth process was used to achieve spatially dependent reflectivity and dispersions characteristics in a highly dispersive…”
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Optimal Parameters of Photonic-Crystal Vertical-Cavity Surface-Emitting Diode Lasers by Czyszanowski, T., Dems, M., Panajotov, K.

“…We investigate the modal characteristics of a 1300-nm InP-based photonic-crystal (PC) vertical-cavity surface- emitting diode laser. To this aim, we apply the…”
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Modeling of single-and multimode photonic-crystal planar waveguides with the plane-wave admittance method by DEMS, M, PANAJOTOV, K

“…In this paper we present the plane-wave admittance method (PWAM) in application to modeling light propagation in photonic crystal waveguides. We determine…”
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Comparison of Usability of Oxide Apertures and Photonic Crystals Used to Create Radial Optical Confinements in 650-nm GaInP VCSELs by Czyszanowski, T., Sarzala, R.P., Piskorski, L., Dems, M., Wasiak, M., Nakwaski, W., Panajotov, K.

“…Threshold characteristics of GaAs-based 650-nm gallium indium phosphide (GalnP) vertical-cavity surface-emitting diode lasers (VCSELs) with two different…”
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Modelling leaky photonic wires : A mode solver comparison by BIENSTMAN, P, SELLERI, S, PINTO, D, OBAYYA, S. S. A, DEMS, M, PANAJOTOV, K, ROSA, L, URANUS, H. P, HOPMAN, W. C. L, COSTA, R, MELLONI, A, ANDREANI, L. C, HUGONIN, J. P, LALANNE, P

“…We present results from a mode solver comparison held within the frameworkof the European COST P11 project. The structure modelled is a high-index contrast…”
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Optical properties of Si/SiO2 and GaAs/AlOx sub-wavelength HCG mirrors on GaAs substrate and an impact of structural imperfections on their performance by Gebski, M., Dems, M., Jian Chen, Wang Qijie, Zhang Dao Hua, Czyszanowski, T.

“…In order to obtain low threshold VCSELs high reflectivity mirrors are crucial in their designs. Typically used Distribute Bragg Reflectors (DBR) provide…”
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Finite-Element and Analytical Calculations of No-Load Core Losses in Energy-Saving Induction Motors by Komeza, K., Dems, M.

“…This paper presents a no-load core loss analysis of a three-phase energy-saving small-size induction motor supplied by a sinusoidal voltage. In the…”
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Application of circuit and field-circuit methods in designing process of small induction motors with stator cores made from amorphous iron by Dems, M., Komeza, K., Wiak, S., Stec, T., Kikosicki, M.

“…Purpose - To investigate the use of amorphous iron as the stator core material to increase the efficiency of electric machines in serialised production.Design…”
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The highly efficient three-phase small induction motors with stator cores made from amorphous iron by Dems, M., Kom za, K., Wiak, S., Stec, T.

“…Applies the field circuit two-dimensional method and improved circuit method to engineering designs of the induction motor with stator cores made of amorphous…”
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Plane Wave Admittance Method - a novel approach for determining the electromagnetic modes in photonic structures by Dems, Maciej, Kotynski, Rafal, Panajotov, Krassimir

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Monolithic high contrast grating VCSELs: Concept and prospects by Gebski, M., Marciniak, M., Dems, M., Lott, J. A., Czyszanowski, T.

“…Recent trend in the research focused on optical communication is to increase the speed and energy efficiency of the signal sources. In the same time, it is…”
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Monolithic high-index-contrast grating VCSELs by Gȩbski, M., Marciniak, M., Dems, M., Wasiak, M., Lott, J. A., Czyszanowski, T.

“…A new and radically simplified construction of the vertical-cavity surface-emitting laser (VCSEL) with monolithic high-index contrast grating will be…”
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Determination of performance parameters of a small-size high-speed induction motor using the field-circuit method by Komeza, K, Dems, M

“…Core losses generated in small size high-speed induction motors constitute a significant part of total losses in the motor, in particular at higher…”
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Photonic Crystal VCSELs: Detailed Comparison of Experimental and Theoretical Spectral Characteristics by Czyszanowski, T., Dems, M., Sarzala, R. P., Panajotov, K., Choquette, K. D.

“…We present a detailed comparison of experimental and simulated optical spectra obtained from a 980-nm photonic-crystal (PhC) VCSEL. We demonstrate good…”
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Precise Lateral Mode Control in Photonic Crystal Vertical-Cavity Surface-Emitting Lasers by Czyszanowski, T., Dems, M., Sarzala, R. P., Nakwaski, W., Panajotov, K.

“…We demonstrate an oscillatory behavior of resonant wavelengths and threshold gains of the fundamental and first-order transverse mode of photonic crystal…”
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Spatial-Mode Discrimination in Guided and Antiguided Arrays of Long-Wavelength VCSELs by Czyszanowski, T., Sarzala, R. P., Dems, M., Walczak, J., Wasiak, M., Nakwaski, W., Iakovlev, V., Volet, N., Kapon, E.

“…Three means of optical confinement imposed on InAlGaAs/InP 1.3 μm VCSEL arrays are investigated with self-consistent numerical model of laser operation…”
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Optimization of Single-Mode Photonic-Crystal Results in Limited Improvement of Emitted Power and Unexpected Broad Range of Tuning by Frasunkiewicz, Leszek, Czyszanowski, T., Wasiak, M., Dems, M., Sarzala, R. P., Nakwaski, W., Panajotov, K.

“…This paper provides a numerical analysis of the influence of photonic crystal etching depth on the confinement factor, slope efficiency, emitted power and…”
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