2011

M. Spreemann, H. Wenzel, B. Eppich, M. Lichtner, and G. Erbert
"Novel Approach to Finite-Aperture Tapered Unstable Resonator Lasers"
IEEE J. Quantum Electron., vol. 47, no. 1, pp. 117-125 (2011).

M. Chi, O.B. Jensen, G. Erbert, B. Sumpf, and P.M. Petersen
"Tunable high-power narrow-spectrum external-cavity diode laser at 675 nm as a pump source for UV generation"
Appl. Opt., vol. 50, no. 1, pp. 90-94 (2011).

B. Sumpf, P. Adamiec, M. Zorn, H. Wenzel, G. Erbert
"Nearly Diffraction Limited Tapered Lasers at 675 nm with 1 W Output Power and Conversion Efficiencies above 30%"
IEEE Photonics Technol. Lett., vol. 23, no. 4, pp. 266-268 (2011).

K.-H. Hasler, B. Sumpf, P. Adamiec, J. Fricke, H. Wenzel, G. Erbert, G. Tränkle
"Improving the modulation efficiency of high-power distributed Bragg reflector tapered diode lasers"
Appl. Phys. B, vol. 102, no. 1, pp. 43-47 (2011).

J. Liebmann, J. Scherer, N. Bibinov, P. Rajasekaran, R. Kovacs, R. Gesche, P. Awakowicz, V. Kolb-Bachofen
"Biological effects of nitric oxide generated by an atmospheric pressure gas-plasma on human skin cells"
Nitric Oxide, vol. 24, no. 1, pp. 8-16 (2011).

V. Hoffmann, A. Knauer, F. Brunner, S. Einfeldt, M. Weyers, G. Tränkle, K. Haberland, J.-T. Zettler, M. Kneissl
"Uniformity of the wafer surface temperature during MOVPE growth of GaN-based laser diode structures on GaN and sapphire substrate"
J. Cryst. Growth, vol. 315, no. 1, pp. 5-9 (2011).

F. Bugge, A. Mogilatenko, U. Zeimer, O. Brox, W. Neumann, G. Erbert, M. Weyers
"Characterization and optimization of 2-step MOVPE growth for single-mode DFB or DBR laser diodes"
J. Cryst. Growth, vol. 315, no. 1, pp. 74-77 (2011).

A. Maaßdorf, M. Hoffmann, M. Weyers
"Growth and characterization of heavily selenium doped GaAs using MOVPE"
J. Cryst. Growth, vol. 315, no. 1, pp. 57-60 (2011).

P. Ivo, A. Glowacki, E. Bahat-Treidel, R. Lossy, J. Würfl, C. Boit, G. Tränkle
"Comparative study of AlGaN/GaN HEMTs robustness versus buffer design variations by applying Electroluminescence and electrical measurements"
Microelectron. Reliab., vol. 51, no. 2, pp. 217-223 (2011).

A. Müller, D. Vijayakumar, O.B. Jensen, K.-H. Hasler, B. Sumpf, G. Erbert, P.E. Andersen, and P.M. Petersen
"16 W output power by high-efficient spectral beam combining of DBR-tapered diode lasers"
Opt. Express, vol. 19, no. 2, pp. 1228-1235 (2011).

P. Klopp, U. Griebner, M. Zorn, M. Weyers
"Pulse repetition rate up to 92 GHz or pulse duration shorter than 110 fs from a mode-locked semiconductor disk laser"
Appl. Phys. Lett., vol. 98, no. 071103 (2011).

V. Kueller, A. Knauer, F. Brunner, U. Zeimer, H. Rodriguez, M. Kneissl, M. Weyers
"Growth of AlGaN and AlN on patterned AlN/sapphire templates"
J. Cryst. Growth, vol. 315, no. 1, pp. 200-203 (2011).

T. Kolbe, A. Knauer, J. Stellmach, C. Chua, Z. Yang, S. Einfeldt, P. Vogt, N.M. Johnson, M. Weyers and Michael Kneissl
"Optical polarization of UV-A and UV-B (In)(Al)GaN multiple quantum well light emitting diodes"
Proc. SPIE, vol. 7939, no. 79391G (2011).

D. Jedrzejczyk, R. Güther, K. Paschke, W.-J. Jeong, H.-Y. Lee, and G. Erbert
"Efficient high-power frequency doubling of distributed Bragg reflector tapered laser radiation in a periodically poled MgO-doped lithium niobate planar waveguide"
Opt. Lett., vol. 36, no. 3, pp. 367-369 (2011).

E. Richter, M. Gründer, B. Schineller, F. Brunner, U. Zeimer, C. Netzel, M. Weyers, and G. Tränkle
"GaN boules grown by high rate HVPE"
phys. stat. sol. (c), vol. 8, no. 5, pp. 1450-1454 (2011).

D. Jedrzejczyk, D. Feise, R. Güther, K. Paschke and G. Erbert
"1 W at 531 nm generated in a ppMgO:LN planar waveguide by means of frequency doubling of a DBR tapered diode laser"
Proc. SPIE, vol. 7917, no. 791703 (2011).

S. Spießberger, M. Schiemangk, A. Sahm, A. Wicht, H. Wenzel, A. Peters, G. Erbert, and G. Tränkle
"Micro-integrated 1 Watt semiconductor laser system with a linewidth of 3.6 kHz"
Opt. Express, vol. 19, no. 8, pp. 7077-7083 (2011).

S. Spießberger, M. Schiemangk, A. Sahm, A. Wicht, H. Wenzel, J. Fricke, and G. Erbert
"1 W semiconductor based laser module with a narrow linewidth emitting near 1064 nm"
Proc. SPIE, vol. 7953, no. 795311 (2011).

C. Fiebig, S. Pekarek, K. Paschke, M. Uebernickel, T. Südmeyer, U. Keller, and G. Erbert
"High-brightness distributed-bragg-reflector tapered diode lasers: pushing your application to the next level"
Proc. SPIE, vol. 7918, no. 79180R (2011).

P.Q. Liu, C. Fiebig, M. Uebernickel, G. Blume, D. Feise, A. Sahm, D. Jedrzejczyk, K. Paschke, and G. Erbert
"High-power (1.1W) green (532nm) laser source based on single-pass second harmonic generation on a compact micro-optical bench"
Proc. SPIE, vol. 7917, no. 791704 (2011).

A. Pietrzak, P. Crump, H. Wenzel, G. Erbert, F. Bugge, and G. Tränkle
"Combination of Low-Index Quantum Barrier and Super Large Optical Cavity Designs for Ultranarrow Vertical Far-Fields From High-Power Broad-Area Lasers"
IEEE J. Sel. Top. Quantum Electron., vol. 17, no. 6, pp. 1715-1722 (2011).

S.M. Riecke, H. Wenzel, S. Schwertfeger, K. Lauritsen, K. Paschke, R. Erdmann, and G. Erbert
"Picosecond Spectral Dynamics of Gain-Switched DFB Lasers"
IEEE J. Quantum Electron., vol. 47, no. 5, pp. 715-722 (2011).

O. Hilt, E. Bahat-Treidel, R. Zhytnytska, P. Kotara, and J. Würfl
"Bauteile aus GaN - Sicht auf die Halbleitertechnologie"
ETG-Fachbericht 128, "Bauelemente der Leistungselektronik und ihre Anwendungen", pp. 47-56 (2011).

S. Schwertfeger, A. Klehr, T. Hoffmann, A. Liero, H. Wenzel, G. Erbert
"Picosecond pulses with 50W peak power and reduced ASE background from an all-semiconductor MOPA system"
Appl. Phys. B, vol. 103, no. 3, pp. 603-607 (2011).

M. Hempel, F. La Mattina, J.W. Tomm, U. Zeimer, R. Broennimann and T. Elsaesser
"Defect evolution during catastrophic optical damage of diode lasers"
Semicond. Sci. Technol., vol. 26, no. 075020 (2011).

M. Radziunas, K.-H. Hasler, B. Sumpf, T.Q. Tien and H. Wenzel
"Mode transitions in distributed Bragg reflector semiconductor lasers: experiments, simulations and analysis"
J. Phys. B: At. Mol. Opt. Phys., vol. 44, no. 105401 (2011).

V. Kueller, A. Knauer, U. Zeimer, H. Rodriguez, A. Mogilatenko, M. Kneissl, and M. Weyers
"(Al,Ga)N overgrowth over AlN ridges oriented in [1120] and [1100] direction"
phys. stat. sol. (c), no. 8, vol. 7-8, pp. 2022-2024 (2011).

M. Martens, J. Schlegel, P. Vogt, F. Brunner, R. Lossy, J. Würfl, M. Weyers, and M. Kneissl
"High gain ultraviolet photodetectors based on AlGaN/GaN heterostructures for optical switching"
Appl. Phys. Lett., vol. 98, no. 211114 (2011).

O. Hilt, F. Brunner, E. Cho, A. Knauer, E. Bahat-Treidel and J. Würfl
"Normally-off High-Voltage p-GaN Gate GaN HFET with Carbon-Doped Buffer"
Proc. Int. Symp. on Power Semiconductor Devices & IC's (ISPSD), San Diego, CA, May 23-26, pp. 239-242 (2011).

A. Müller, O.B. Jensen, A. Unterhuber, T. Le, A. Stingl, K.-H. Hasler, B. Sumpf, G. Erbert, P.E. Andersen, and P.M. Petersen
"Frequency-doubled DBR-tapered diode laser for direct pumping of Ti:sapphire lasers generating sub-20 fs pulses"
Opt. Express, vol. 19, no. 13, pp. 12156-12163 (2011).

S.A. Chevtchenko, P. Kurpas, N. Chaturvedi, R. Lossy and J. Würfl
"Investigation and Reduction of Leakage Current Associated with Gate Encapsulation by SiN_x in AlGaN/GaN HFETs"
Int. Conf. on Compound Semiconductor Manufacturing Technology (CS ManTech 2011), Palm Springs, USA, May 16-19, pp. 237-240 (2011).

C.K. Amuzuvi, S. Bull, J.W. Tomm, J. Nagle, B. Sumpf, G. Erbert, N. Michel, M. Krakowski, and E.C. Larkins
"The impact of temperature and strain-induced band gap variations on current competition and emitter power in laser bars"
Appl. Phys. Lett., vol. 98, no. 241108 (2011).

P. Crump, C.M. Schultz, H. Wenzel, S. Knigge, O. Brox, A. Maaßdorf, F. Bugge and G. Erbert
"Reliable operation of 976nm High Power DFB Broad Area Diode Lasers with over 60% Power Conversion Efficiency"
Proc. SPIE, vol. 7953, no. 79531G (2011).

M. Spreemann, H. Wenzel, B. Eppich, M. Lichtner and G. Erbert
"A novel approach to finite-aperture tapered unstable resonator lasers"
Proc. SPIE, vol. 7953, no. 79531I (2011).

P. Ivo, U. Zeimer, P. Kotara, E. Cho, L. Schellhase, E. Bahat-Treidel, J. Würfl, G. Tränkle, A. Glowacki, and C. Boit
"Degradation Mechanism of GaN HEMTs in Dependence on Buffer Quality and Gate Technology"
Reliability Of Compound Semiconductors Workshop (ROCS 2011), Palm Springs, USA, May 16 (2011).

A. Klehr, A. Liero, Th. Hoffmann, S. Schwertfeger, H. Wenzel, G. Erbert, W. Heinrich and G. Tränkle
"Compact ps-pulse laser source with free adjustable repetition rate and nJ pulse energy on microbench"
Proc. SPIE, vol. 7953, no. 79531D (2011).

T. Schlauch, J.C. Balzer, M.R. Hofmann, A. Klehr, G. Erbert, G. Tränkle
"Passively mode-locked two section laser diode with intracavity dispersion control"
Proc. SPIE, vol. 7937, no. 79370S (2011).

M. Lührmann, F. Harth, C. Theobald, T. Ulm, R. Knappe, A. Nebel, A. Klehr, G. Erbert, J.A. L’huillier
"High average power Nd:YVO₄ regenerative amplifier seeded by a gain switched diode laser"
Proc. SPIE, vol. 7912, no. 791210 (2011).

M. Uebernickel, B. Eppich, C. Fiebig, K. Paschke, G. Erbert
"Wigner distribution function of DBR tapered diode lasers"
Proc. SPIE, vol. 7918, no. 79180C (2011).

D. Feise, G. Blume, Chr. Kaspari, K. Paschke, and G. Erbert
"Variation of refractive index step of 635 nm ridge waveguide lasers for optimized index guiding"
Proc. SPIE, vol. 7918, no. 791812 (2011).

A. Sahm, M. Uebernickel, C. Fiebig, K. Paschke, G. Erbert, G. Tränkle
"Thermal Optimization of the Second Harmonic Generation with Tapered Diode Lasers"
Proc. SPIE, vol. 7917, no. 791708 (2011).

B. Sumpf, P. Adamiec, M. Zorn, H. Wenzel, G. Erbert, G. Tränkle
"670 nm nearly diffraction limited tapered lasers with more than 30% conversion efficiency and 1 W cw and 3 W pulsed output power"
Proc. SPIE, vol. 7953, no. 79530Z (2011).

V. Shchukin, N. Ledentsov, K. Posilovic, V. Kalosha, T. Kettler, D. Seidlitz, M. Winterfeldt, D. Bimberg, N.Y. Gordeev, L.Y. Karachinsky, I.I. Novikov, Y.M. Shernyakov, A.V. Chunareva, M.V. Maximov, F. Bugge, and M. Weyers
"Tilted Wave Lasers: A Way to High Brightness Sources of Light"
IEEE J. Quantum Electron., vol. 47, no. 7, pp. 1014-1027 (2011).

E. Bahat-Treidel, O. Hilt, R. Zhytnytska, E. Cho, J. Würfl and G. Tränkle
"GaN-based Schottky diodes with low onset voltage and strong reverse blocking"
38th Int. Symp. on Compound Semiconductors (ISCS), Berlin, Germany, May 22-26, pp. 246-247 (2011).

E. Bahat-Treidel, O. Hilt, R. Zhytnytska, E. Cho, J. Würfl and G. Tränkle
"AlGaN/GaN/GaN:C back-barrier Schottky diodes for power switching"
35rd Workshop on Compound Semiconductor Devices and Integrated Circuits (WOCSDICE), Catania, Italy, May 29 - Jun 1, ISBN 978-88-8080-123-8, pp. 165-166 (2011).

T. Calmano, J. Siebenmorgen, A.-G. Paschke, C. Fiebig, K. Paschke, G. Erbert, K. Petermann and G. Huber
"Diode pumped high power operation of a femtosecond laser inscribed Yb:YAG waveguide laser"
Opt. Mater. Express, vol. 1, no. 3, pp. 428-433 (2011).

M. Kneissl, T. Kolbe, J. Schlegel, J. Stellmach, C.L. Chua, Z. Yang, A. Knauer, V. Kueller, M. Weyers, and N. Johnson
"AlGaN-based Ultraviolet Lasers - Applications and Materials Challenges"
Conf. on Lasers and Electro-Optics (CLEO 2011), Baltimore, USA, May 01-06, paper JTuB1 (2011).

S. Spießberger, M. Schiemangk, A. Sahm, A. Wicht, H. Wenzel, G. Erbert, and G. Tränkle
"Narrow-Linewidth High-Power Semiconductor-based Laser Module"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CB-P10-THU (2011).

J.C. Balzer, T. Schlauch, M.R. Hofmann, A. Klehr, G. Erbert
"Shoe box all semiconductor high power femtosecond laser system"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CB-P33-THU (2011).

D. Jedrzejczyk, S. Riecke, R. Güther, K. Lauritsen, K. Paschke, G. Erbert
"Influence of the acceptance bandwidth on frequency doubling of ps pulses in a ppMgO:LN ridge waveguide"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CB-P36-WED (2011).

A. Klehr, A. Liero, T. Hoffmann, S. Schwertfeger, H. Wenzel, G. Erbert, W. Heinrich and G. Tränkle
"Compact 1064 nm ps-light source on a micro bench with free adjustable repetition rate and nJ pulse energy"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CB7.6-WED (2011).

E. Luvsandamdin, G. Mura, A. Wicht, A. Sahm, G. Erbert and G. Tränkle
"Hybrid-integrated ECDL for precision Rubidium spectroscopy in space"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CB-P12-THU (2011).

S. Pekarek, C. Fiebig, K. Paschke, G. Erbert, T. Südmeyer, and U. Keller
"Octave-Spanning Supercontinuum from an Efficient Gigahertz Femtosecond Yb:KGW Laser with 2.2-W Average Power"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CA11.1-WED (2011).

S. Schwertfeger, A. Klehr, A. Liero, T. Hoffmann, H. Wenzel, G. Erbert
"Picosecond pulses with more than 60 W peak power generated by a singlestage all-semiconductor master-oscillator power-amplifier system"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CB7.4-WED (2011).

C.M. Schultz, P. Crump, H. Wenzel, S. Knigge, O. Brox, A. Maaßdorf, F. Bugge and G. Erbert
"Efficiency-optimized 973nm high power broad area DFB lasers with overgrown aluminium-free gratings for peak power conversion of 63%"
European Conf. on Lasers and Electro-Optics and the European Quantum Electronics Conf. (CLEO Europe - EQEC 2011), Munich, Germany, May 22-26, paper CB7.3-WED (2011).

R. Aleksiejunas, L. Lubys, M. Vengris, K. Jarasiunas, T. Wernicke, V. Hoffmann, C. Netzel, A. Knauer, M. Weyers, M. Kneissl
"Study of excess carrier dynamics in polar, semi-polar, and nonpolar InGaN epilayers and QWs"
phys. stat. sol. (c), vol. 8, no. 7-8, pp. 2154-2156 (2011).

F. Brunner, E. Bahat-Treidel, M. Cho, C. Netzel, O. Hilt, J. Würfl, and M. Weyers
"Comparative study of buffer designs for high breakdown voltage AlGaNGaN HFETs"
phys. stat. sol. (c), vol. 8, no. 7-8, pp. 2427-2429 (2011).

D. Grosse, T. Schlauch, J.C. Balzer, A. Klehr, G. Erbert, G. Tränkle and M.R. Hofmann
"Colliding pulse mode-locked lasers as light sources for single-shot holography"
Semiconductor and Integrated Optoelectronics (SIOE) conference, Cardiff, Wales, United Kingdom, Apr. 18-21 (2011).

C. Kaspari, G. Blume, D. Feise, K. Paschke, G. Erbert, M. Weyers
"Optimisation of 660 nm high-power tapered diode lasers"
IET Optoelectron., vol. 5, no. 3, pp. 121-127 (2011).

D. Grosse, N. Koukourakis, N.C. Gerhardt, T. Schlauch, J.C. Balzer, A. Klehr, G. Erbert, G. Tränkle and M.R. Hofmann
"Colliding pulse mode-locked lasers as light sources for single-shot holography"
Proc. SPIE, vol. 8001, no. 80010O (2011).

C. Netzel, S. Hatami, V. Hoffmann, T. Wernicke, A. Knauer, M. Kneissl and M. Weyers
"GaInN quantum well design and measurement conditions affecting the emission energy S-shape"
phys. stat. sol. (c), vol. 8, no. 7-8, pp. 2151-2153 (2011).

S. Spießberger, M. Schiemangk, A. Wicht, H. Wenzel, G. Erbert, G. Tränkle
"DBR laser diodes emitting near 1064 nm with a narrow intrinsic linewidth of 2 kHz"
Appl. Phys. B, vol. 104, no. 4, pp. 813-818 (2011).

S. Spießberger, M. Schiemangk, A. Sahm, A. Wicht, H. Wenzel, G. Erbert, and G. Tränkle
"1W narrow linewidth semiconductor based laser module emitting near 1064 nm for the use in coherent optical communication in space"
Int. Conf. on Space Optical Systems and Applications (ICSOS 2011), Santa Monica, USA, May 11-13, pp. 324-326 (2011).

E. Luvsandamdin, G. Mura, A. Wicht, A. Sahm, S. Spießberger, H. Wenzel, G. Erbert and G. Tränkle
"Micro-integrated ECDLs for precision spectroscopy in space"
Int. Conf. on Space Optical Systems and Applications (ICSOS 2011), Santa Monica, USA, May 11-13, pp. 383-385 (2011).

L. Schade, U.T. Schwarz, T. Wernicke, J. Rass, S. Ploch, M. Weyers, and M. Kneissl
"On the optical polarization properties of semipolar InGaN quantum wells"
Appl. Phys. Lett., vol. 99, no. 051103 (2011).

A. Wentzel, C. Meliani and W. Heinrich
"A voltage-mode class-S power amplifier for the 450 MHz band"
Int. J. Microwave Wireless Technolog., vol. 3, no. 3, pp. 311-318 (2011).

O. Bengtsson, S.A. Chevtchenko, R. Doerner, P. Kurpas and W. Heinrich
"Load-Pull Investigation of a High-Voltage RF-Power GaN-HEMT Technology in Supply Modulated Applications"
Frequenz, vol. 65, no. 7-8, pp. 217-224 (2011).

M. Kneissl, J. Rass
"Blue and green-emitting laser diodes"
Landolt-Börnstein - Numerical Data and Functional Relationships in Science and Technology, Group VIII - Advanced Materials and Technologies, Laser Physics and Applications, Subvolume B - Laser Systems - Part 3, Springer (Berlin, Heidelberg), ISBN-13: 978-3-642-14176-8, pp. 27-40 (2011).

P. Crump
"Diode lasers in the near infra-red spectral range"
Landolt-Börnstein - Numerical Data and Functional Relationships in Science and Technology, Group VIII - Advanced Materials and Technologies, Laser Physics and Applications, Subvolume B - Laser Systems - Part 3, Springer (Berlin, Heidelberg), ISBN-13: 978-3-642-14176-8, pp. 59-78 (2011).

B. Eppich
"Standard characterization methods"
Landolt-Börnstein - Numerical Data and Functional Relationships in Science and Technology, Group VIII - Advanced Materials and Technologies, Laser Physics and Applications, Subvolume B - Laser Systems - Part 3, Springer (Berlin, Heidelberg), ISBN-13: 978-3-642-14176-8, pp. 145-154 (2011).

B. Sumpf, K. Häusler
"Reliability and life time"
Landolt-Börnstein - Numerical Data and Functional Relationships in Science and Technology, Group VIII - Advanced Materials and Technologies, Laser Physics and Applications, Subvolume B - Laser Systems - Part 3, Springer (Berlin, Heidelberg), ISBN-13: 978-3-642-14176-8, pp. 155-173 (2011).

B. Sumpf, U. Zeimer
"Defect analysis"
Landolt-Börnstein - Numerical Data and Functional Relationships in Science and Technology, Group VIII - Advanced Materials and Technologies, Laser Physics and Applications, Subvolume B - Laser Systems - Part 3, Springer (Berlin, Heidelberg), ISBN-13: 978-3-642-14176-8, pp. 175-182 (2011).

B. Sumpf, J. Fricke, P. Ressel, M. Zorn, G. Erbert and G. Tränkle
"20 000 h reliable operation of 100 µm stripe width 650 nm broad area lasers at more than 1.1 W output power"
Semicond. Sci. Technol., vol. 26, no. 105011 (2011).

E. Cho, F. Brunner, R. Zhytnytska, P. Kotara, J. Würfl, and M. Weyers
"Enhancement of channel conductivity in AlGaN/GaN heterostructure field effect transistors by AlGaN:Si back barrier"
Appl. Phys. Lett., vol. 99, no. 103505 (2011).

P. Kotara, O. Hilt, H. Kirmse, J. Würfl, W. Neumann, and G. Tränkle
"Electrical and EDX-analysis of CF₄ and Ar plasma treated AlGaN/GaN HEMTs"
phys. stat. sol. (c), vol. 8, no. 7-8, pp. 2207-2209 (2011).

A. Klehr, H. Wenzel, S. Schwertfeger, O. Brox, A. Liero, Th. Hoffmann and G. Erbert
"High peak-power nanosecond pulses generated with DFB RW laser"
Electron. Lett., vol. 47, no.18, pp. 1039-1040 (2011).

C. Netzel, C. Mauder, T. Wernicke, B. Reuters, H. Kalisch, M. Heuken, A. Vescan, M. Weyers and M. Kneissl
"Strong charge carrier localization interacting with extensive nonradiative recombination in heteroepitaxially grown m-plane GaInN quantum wells"
Semicond. Sci. Technol., vol. 26, no. 105017 (2011).

J. Schlegel, M. Martens, F. Brunner, S. Einfeldt, M. Weyers, and M. Kneissl
"Influence of minority carrier lifetime on photoresponse characteristics of visible-blind Al_0.25Ga_0.75N MSM photodetectors"
11th Int. Conf. on Numerical Simulation of Optoelectronic Devices (NUSOD 2011), Rom, Italy, Sep. 5-8 (2011).

M. Kneissl, T. Kolbe, C. Chua, V. Kueller, N. Lobo, J. Stellmach, A. Knauer, H. Rodriguez, S. Einfeldt, Z. Yang, N.M. Johnson and M. Weyers
"Advances in group III-nitride-based deep UV light-emitting diode technology"
Semicond. Sci. Technol., vol. 26, no. 014036 (2011).

M.A. Würtele, T. Kolbe, M. Lipsz, A. Külberg, M. Weyers, M. Kneissl, M. Jekel
"Application of GaN-based ultraviolet-C light emitting diodes - UV LEDs - for water disinfection"
Water Research, vol. 45, no. 3, pp. 1481-1489 (2011).

T. Wernicke, S. Ploch, V. Hoffmann, A. Knauer, M. Weyers, and M. Kneissl
"Surface morphology of homoepitaxial GaN grown on non- and semipolar GaN substrates"
phys. stat. sol. (b), vol. 248, no. 3, pp. 574-577 (2011).

L. Schade, U.T. Schwarz, T. Wernicke, M. Weyers, and M. Kneissl
"Impact of band structure and transition matrix elements on polarization properties of the photoluminescence of semipolar and nonpolar InGaN quantum wells"
phys. stat. sol. (b), vol. 248, no. 3, pp. 638-646 (2011).

H. Wenzel, P. Crump, H. Ekhteraei, C. Schultz, J. Pomplun, S. Burger, L. Zschiedrich, F. Schmidt and G. Erbert
"Theoretical and experimental analysis of the lateral modes of high-power broad-area lasers"
11th Int. Conf. on Numerical Simulation of Optoelectronic Devices (NUSOD 2011), Rom, Italy, Sep. 5-8 (2011).

U. Demirbas, M. Schmalz, B. Sumpf, G. Erbert, G.S. Petrich, L.A. Kolodziejski, J.G. Fujimoto, F.X. Kärtner, and A. Leitenstorfer
"Femtosecond Cr:LiSAF and Cr:LiCAF lasers pumped by tapered diode lasers"
Opt. Express, vol. 19, no. 21, pp. 20444-20461 (2011).

J. Würfl, E. Bahat-Treidel, F. Brunner, M. Cho, O. Hilt, M. Weyers, R. Zhytnytska
"High voltage normally-off transistors and Schottky diodes based on GaN technology"
ECS Trans., vol. 41, no. 8, pp. 127-138 (2011).

J. Würfl, E. Bahat-Treidel, F. Brunner, E. Cho, O. Hilt, P. Ivo, A. Knauer, P. Kurpas, R. Lossy, M. Schulz, S. Singwald, M. Weyers, R. Zhytnytska
"Reliability issues of GaN based high voltage power devices"
Microelectron. Reliab., vol. 51, no. 9-11, pp. 1710-1716 (2011).

O.B. Jensen, B. Sumpf, G. Erbert, and P.M. Petersen
"Widely Tunable High-Power Tapered Diode Laser at 1060 nm"
IEEE Photonics Technol. Lett., vol. 23, no. 21, pp. 1624-1626 (2011).

A. Sahm, M. Uebernickel, K. Paschke, G. Erbert, and G. Tränkle
"Thermal optimization of second harmonic generation at high pump powers"
Opt. Express, vol. 19, no. 23, pp. 23029-23035 (2011).

V. Subramanian, T. Zhang, and G. Boeck
"Low Noise 24 GHz CMOS Receiver for FMCW Based Wireless Local Positioning"
IEEE Microw. Wireless Compon. Lett., vol. 21, no. 10, pp. 553-555 (2011).

P. Crump, C.M. Schultz, H. Ekhteraei, H. Wenzel and G. Erbert
"The Modal Content of High Power Broad Area Diode Lasers with Integrated Distributed Feedback Gratings"
IEEE Photonics 2011 Conference (IPC11) Arlington, USA, Oct 9-13, pp. 581-582 (2011).

K. Paschke, G. Blume, D. Feise, and G. Erbert
"Progress in efficient, high-brightness red-emitting tapered diode lasers for display applications"
IEEE Photonics 2011 Conference (IPC11) Arlington, USA, Oct 9-13, pp. 290-291 (2011).

X. Wang, H. Wenzel, B. Eppich, P. Crump, M. Spreemann, A. Ginolas, J. Fricke, F. Bugge, G. Erbert, and G. Tränkle
"56W optical output power at 970nm from a truncated tapered semiconductor optical amplifier"
IEEE Photonics 2011 Conference (IPC11) Arlington, USA, Oct 9-13, pp. 577-578 (2011).

A. Yoshida, A. Schmidt, V. Petrov, C. Fiebig, G. Erbert, J. Liu, H. Zhang, J. Wang, and U. Griebner
"Diode-pumped mode-locked Yb:YCOB laser generating 35 fs pulses"
Opt. Lett., vol. 36, no. 22, pp. 4425-4427 (2011).

J. Rass, T. Wernicke, S. Ploch, M. Brendel, A. Kruse, A. Hangleiter, W. Scheibenzuber, U.T. Schwarz, M. Weyers, and M. Kneissl
"Polarization dependent study of gain anisotropy in semipolar InGaN lasers"
Appl. Phys. Lett., vol. 99, no. 171105 (2011).

A.I. Bawamia, G. Blume, B. Eppich, A. Ginolas, S. Spießberger, M. Thomas, B. Sumpf, and G. Erbert
"Miniaturized Tunable External Cavity Diode Laser with Single-Mode Operation and a Narrow Linewidth at 633 nm"
IEEE Photonics Technol. Lett., vol. 23, no. 22, pp. 1676-1678 (2011).

A. Wentzel, C. Meliani, W. Heinrich
"Optimized Coding Scheme for Class-S Amplifiers"
European Microwave Conf. (EuMC 2011), Manchester, UK, Oct. 10-13, pp. 329-332 (2011).

F.J. Schmückle, R. Doerner, G.N. Phung, W. Heinrich, D. Williams, U. Arz
"Radiation, Multimode Propagation, and Substrate Modes in W-Band CPW Calibrations"
European Microwave Conf. (EuMC 2011), Manchester, UK, Oct. 10-13, pp. 297-300 (2011).

N.N. Ledentsov, V.A. Shchukin, I.I. Novikov, N.Yu. Gordeev, M.V. Maximov, Y.M. Shernyakov, A.S. Pausov, K. Posilovic, T. Kettler, D. Bimberg, F. Bugge, M. Weyers
"High-power edge-emitting laser diode with narrow vertical beam divergence"
Electron. Lett., vol. 47, no.24, pp. 1339-1341 (2011).

A. Pietrzak, P. Crump, H. Wenzel F. Bugge, J. Fricke, and G. Erbert
"High Power Diode Lasers with Very Narrow Vertical Beam Divergence"
Photonex 2011, Coventry, UK, Oct. 18-19 (2011).

R. Schlundt, F.-J. Schmückle, W. Heinrich
"Shifted linear systems in electromagnetics. Part II: Systems with multiple right-hand sides"
WIAS Preprint, ISSN 0946-8633, no. 1646 (2011).

J.C. Balzer, T. Schlauch, Th. Hoffmann, A. Klehr, G. Erbert and M.R. Hofmann
"Modelocked semiconductor laser system with pulse picking for variable repetition rate"
Electron. Lett., vol. 47, no. 25, pp. 1387-1388 (2011).

O. Hilt, E. Bahat-Treidel and J. Würfl
"Normally-off GaN Transistors and Diodes for Power Applications"
3rd Global COE Int. Symp. Electronic Devices Innovation (EDIS 2011), Osaka, Japan, Dec. 16-17 (2011).

T. Kolbe, A. Knauer, C. Chua, Z. Yang, V. Kueller, S. Einfeldt, P. Vogt, N.M. Johnson, M. Weyers, and M. Kneissl
"Effect of temperature and strain on the optical polarization of (In)(Al)GaN ultraviolet light emitting diodes"
Appl. Phys. Lett., vol. 99, no. 261105 (2011).

F. Lenk, R. Doerner, A. Rumiantsev, M. Rudolph
"Calibration residual error propagation analysis using conformal mapping"
77th ARFTG Microwave Measurement Conference (ARFTG), Baltimore, USA, Jun. 10 (2011).

A. Hamidian, V. Subramanian, R. Doerner, R. Shu, A. Malignaggi, M.K. Ali, G. Boeck
"60 GHz Power Amplifier Utilizing 90 nm CMOS Technology"
IEEE International Symposium on Radio-Frequency Integration Technology (RFIT 2011), Beijing, China, Nov. 30-Dec. 2, pp. 73-76 (2011).

V. Keuter, I. Gehrke, J. Glaab, M. Kneissl, Th. Strunskus, V. Zaparojtchenko, T. Hrkacup
"Barrierensystem aus nanobeschichteten Mikrosieben und UV-Strahlungsquelle für die Wassertechnik"
Tagungsband zur 44. Essener Tagung für Wasser- und Abfallwirtschaft in Schriftenreihe Gewässerschutz, Wasser, Abwasser, vol. 223, pp. 35/1-35/10 (2011).