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Anzahl der Einträge: 68.

2006

Jain, Manish, Appel, Helmut, Meier, Alexander, Wegscheider, Werner und Renk, Karl Friedrich (2006) Semiconductor-superlattice oscillator with superlattices connected in parallel and series as active elements for generation of millimetre waves. IEE Proceedings: Microwaves, Antennas & Propagation 153 (5), S. 441-446. Zugang zum Volltext eingeschränkt.

Renk, Karl Friedrich, Rogl, Andreas, Stahl, Benjamin Ingo, Meier, Alexander, Koschurinov, Y., Pavel'ev, D., Ustinov, V., Zhukov, A., Maleev, N. und Vasilyev, A. (2006) Semiconductor-Superlattice Frequency Mixer For Detection of Submillimeter Waves. International Journal of Infrared and Millimeter Waves 27 (3), S. 373-380. Zugang zum Volltext eingeschränkt.

2005

Renk, Karl Friedrich, Stahl, Benjamin Ingo, Rogl, Andreas, Janzen, T., Pavel'ev, D., Koschurinov, Y., Ustinov, V. und Zhukov, A. (2005) Subterahertz superlattice parametric oscillator. Physical Review Letters 95, S. 126801. Zugang zum Volltext eingeschränkt.

Renk, Karl Friedrich, Meier, Alexander, Stahl, Benjamin Ingo, Glukhovskoy, Anatoly, Jain, Manish, Appel, Helmut und Wegscheider, Werner (2005) Operation of a Bloch oscillator.

Renk, Karl Friedrich, Stahl, Benjamin Ingo, Rogl, Andreas, Janzen, T., Pavel'ev, D., Koschurinov, Y., Ustinov, V. und Zhukov, A. (2005) Terahertz superlattice parametric oscillator.

Demarina, N. V. und Renk, Karl Friedrich (2005) Bloch gain for terahertz radiation in semiconductor superlattices of different miniband widths mediated by acoustic and optical phonons. Physical Review B 71, 035341. Zugang zum Volltext eingeschränkt.

2004

Klappenberger, Florian, Alekseev, K., Renk, Karl Friedrich, Scheuerer, R., Schomburg, Ekkehard, Allen, S., Ramian, G., Scott, J., Kovsh, A., Ustinov, V. und Zhukov, A. (2004) Ultrafast creation and annihilation of space-charge domains in a semiconductor superlattice observed by use of terahertz fields. European Physical Journal B 39 (4), S. 483-489. Zugang zum Volltext eingeschränkt.

Scheuerer, Roland, Pavelev, Dimitri, Renk, Karl Friedrich und Schomburg, Ekkehard (2004) Frequency multiplication using induced dipole domains in a semiconductor superlattice. Physica E 22 (4), S. 797-803. Zugang zum Volltext eingeschränkt.

Klappenberger, Florian, Renk, Karl Friedrich, Renk, P., Rieder, Bernhard, Koschurinov, Y., Pavelev, Dimitri, Ustinov, V., Zhukov, A., Maleev, N. und Vasilyev, A. (2004) Semiconductor-superlattice frequency multiplier for generation of submillimeter waves. Applied Physics Letters 84 (19), S. 3924-3926. Zugang zum Volltext eingeschränkt.

Klappenberger, Florian und Renk, Karl Friedrich (2004) Proposal of a microwave-driven semiconductor superlattice oscillator for generation of THz radiation. International Journal of Infrared and Millimeter Waves 25 (3), S. 429-438. Zugang zum Volltext eingeschränkt.

2003

Klappenberger, Florian und Renk, Karl Friedrich (2003) Transient-pulse nonlinear spectroscopy with the radiation of a multimode THz gas laser. International Journal of Infrared and Millimeter Waves 24 (9), S. 1405-1414. Zugang zum Volltext eingeschränkt.

Klappenberger, Florian, Renk, Karl Friedrich, Summer, Raimund Franz, Keldysh, Leonid, Rieder, Bernhard und Wegscheider, Werner (2003) Electric-field-induced reversible avalanche breakdown in a GaAs microcrystal due to cross band gap impact ionization. Applied Physics Letters 83 (4), S. 704-706. Zugang zum Volltext eingeschränkt.

Klappenberger, Florian, Renk, Karl Friedrich, Summer, R., Keldysh, Leonid, Rieder, Bernhard und Wegscheider, Werner (2003) Electric-field-induced reversible avalanche breakdown in a GaAs microcrystal due to cross band gap impact ionization. Applied Physics Letters 83 (4), S. 704-706. Zugang zum Volltext eingeschränkt.

Schomburg, Ekkehard, Demarina, Nataliya und Renk, Karl Friedrich (2003) Amplification of a terahertz field in a semiconductor superlattice via phase-locked-k-space bunches of Bloch oscillating electrons. Physical Review B 67 (15), S. 155302. Zugang zum Volltext eingeschränkt.

Scheuerer, R., Häußler, M., Renk, Karl Friedrich, Schomburg, Ekkehard, Koschurinov, Y., Pavelev, Dimitri, Maleev, N., Ustinov, V. und Zhukov, A. (2003) Frequency multiplication of microwave radiation by propagating space-charge domains in a semiconductor superlattice. Applied Physics Letters 82 (17), S. 2826-2828. Zugang zum Volltext eingeschränkt.

Häußler, Michael, Scheuerer, R., Renk, Karl Friedrich, Koschurinov, Y. und Pavelev, Dimitri (2003) Microwave frequency multiplication by use of space charge domains in semiconductor superlattices. Electronics Letters 39 (7), S. 628-629. Volltext nicht vorhanden.

Häußler, Michael, Schomburg, Ekkehard, Batke, Jörg-Martin, Klappenberger, Florian, Weber, Alexander, Appel, Helmut, Renk, Karl Friedrich, Hummel, H., Stroebl, B., Pavelev, Dimitri und Koschurinov, Y. (2003) Millimetre-wave generation with semiconductor superlattice mounted in cavity fabricated by UV- photolithography and galvanoforming. Electronics Letters 39 (10), S. 784-785. Volltext nicht vorhanden.

2002

Scheuerer, Roland, Renk, Karl Friedrich, Schomburg, Ekkehard, Wegscheider, Werner und Bichler, Max (2002) Nonlinear superlattice transport limited by Joule heating. Journal of Applied Physics 92 (10), S. 6043-6046. Zugang zum Volltext eingeschränkt.

Klappenberger, F., Renk, Karl Friedrich, Schomburg, Ekkehard, Summer, R., Ganichev, Sergey und Prettl, Wilhelm (2002) Fast GaAs detector for THz radiation. In: 27th International Conference of Infrared and Millimeter Waves, 22. - 26. September 2002, San Diego, USA. Volltext nicht vorhanden.

2001

Klappenberger, F, Ignatov, A. A., Winnerl, S., Schomburg, Ekkehard, Wegscheider, Werner, Renk, Karl Friedrich und Bichler, Max (2001) Broadband semiconductor superlattice detector for THz radiation. Applied Physics Letters 78 (12), S. 1673-1675. Zugang zum Volltext eingeschränkt.

1999

Schomburg, Ekkehard, Henini, M., Chamberlain, J. M., Steenson, D. P., Brandl, S., Hofbeck, K., Renk, Karl Friedrich und Wegscheider, Werner (1999) Self-sustained current oscillation above 100 GHz in a GaAs/AlAs superlattice. Applied Physics Letters 74 (15), S. 2179-2181. Zugang zum Volltext eingeschränkt.

1994

Renk, Karl Friedrich, Betz, J., Zeuner, S., Lengfellner, Hans und Prettl, Wilhelm (1994) Thermopile effect due to laser radiation heating in thin films of high-Tc materials. Physica C Superconductivity and its Applications 235-240 (1), S. 37-40.

Zeuner, S., Prettl, Wilhelm, Renk, Karl Friedrich und Lengfellner, Hans (1994) Nernst effect in Tl-Ba-Ca-Cu-O high-Tc superconducting thin films. Physical Review B (PRB) 49 (13), S. 9080-9083.

Lengfellner, Hans, Zeuner, S., Prettl, Wilhelm und Renk, Karl Friedrich (1994) Thermoelectric Effect in Normal-State YBa2Cu3O7-δ Films. Europhysics Letters 25 (5), S. 375-378.

Lengfellner, Hans, Zeuner, S., Prettl, Wilhelm und Renk, Karl Friedrich (1994) Thermoelectric Effect in Normal-State YBa2Cu3O7-δ Films (Addendum). epl = Europhysics Letters 27 (6), S. 491.

1993

Bespalov, A. V., Schilz, A., Prettl, Wilhelm, Fischer, W. W. und Renk, Karl Friedrich (1993) Nonlinear magnetic field dependence of the emission frequency and bandwidth of a far-infrared p-type Ge cyclotron laser. Physical Review B (PRB) 47 (11), S. 6312-6315.

Lengfellner, Hans, Kremb, G., Betz, J., Renk, Karl Friedrich und Prettl, Wilhelm (1993) Giant voltages upon surface heating in normal YBa2Cu3O7−δ films explained by an atomic layer thermopile. In: Kuzmany, Hans und Mehring, M. und Fink, J., (eds.) Electronic properties of high Tc superconductors: the normal and the superconducting state of high Tc materials; proceedings of the international winter school, Kirchberg, Tyrol, March 7 - 14, 1992. Springer series in solid state sciences, 113. Springer, Berlin, S. 278-281. ISBN 3-540-56195-1; 0-387-56195-1. Volltext nicht vorhanden.

Betz, J., Zeuner, S., Schabenberger, W., Härteis, Th., Prettl, Wilhelm, Lengfellner, Hans und Renk, Karl Friedrich (1993) YBa₂Cu₃O₇-δ Atomic Layer Thermopile. In: European Conference on Applied Superconductivity (EUCAS), 4.-9. Oktober 1993, Göttingen, Germany. Volltext nicht vorhanden.

1992

Golubev, V. A., Schilz, A., Prettl, Wilhelm und Renk, Karl Friedrich (1992) Far-Infrared Photoconductivity in n-GaAs at Filamentary Current flow. In: Temkin, Richard, (ed.) Conference digest: Seventeenth International Conference on Infrared and Millimeter Waves: 14 - 17 December 1992, Pasadena, California. Proceedings of the Society of Photo-Optical Instrumentation Engineers, 1929. SPIE, Bellingham, Washington, S. 296. ISBN 0-8194-1163-9. Volltext nicht vorhanden.

Lengfellner, H., Zeuner, S., Prettl, Wilhelm und Renk, Karl Friedrich (1992) Giant Photovoltaic Effects on YBaCuO-Layers. In: Härtwich, P. und Leson, A., (eds.) Proc. 5th German-CIS Bilateral Seminar on High-Temperature Superconductivity, Kloster Banz. , S. 126. Volltext nicht vorhanden.

Lengfellner, Hans, Kremb, G., Schnellbögl, A., Betz, J., Renk, Karl Friedrich und Prettl, Wilhelm (1992) Giant voltages upon surface heating in normal YBa2Cu3O7−δ films suggesting an atomic layer thermopile. Applied Physics Letters 60 (4), S. 501-503.

Zeuner, S., Lengfellner, Hans, Betz, J., Renk, Karl Friedrich und Prettl, Wilhelm (1992) Heat propagation in high Tc films investigated by optical response measurements. Applied Physics Letters 61 (8), S. 973-975.

1991

Lengfellner, Hans, Schneider, G., Betz, J., Hogan, M., Prettl, Wilhelm und Renk, Karl Friedrich (1991) Superconducting Energy Gap from Infrared Response Measurements in Granular Tl2Ba2CaCu2O8 Films. Europhysics Letters 15 (3), S. 343-347.

Beregulin, E., Ganichev, Sergey, Yaroshetskii, I., Lang, P., Schatz, W. und Renk, Karl Friedrich (1991) Abstimmbare Erzeugung von Sub-ns-Ferninfrarot- Pulsen. In: Fruehjahrstagung der Deutschen-Physikalischen-Gesellschaft, 1991, Verhandl. DPG (VI) 26, Germany. Volltext nicht vorhanden.

Andrä, W., Betz, J., Brunner, B., Hergt, R., Lengfellner, Hans, Renk, Karl Friedrich und Steenbeck, K. (1991) Characterization of YBCO films by torque magnetometry. Physica C: Superconductivity and its Applications 180 (1-4), S. 188-191.

Scherzl, K, Hogan, M., Simms, D., Betz, J., Blau, W., Lengfellner, Hans, Renk, Karl Friedrich und Prettl, Wilhelm (1991) FIR response of HTC Tl-Ba-Ca-Cu-O Films. In: Siegrist, M. R. und Tran, M. Q. und Tran, T. M., (eds.) Conference digest: Sixteenth International Conference on Infrared and Millimeter Waves: 26 - 30 August 1991, Lausanne, Switzerland. Proceedings of the Society of Photo-Optical Instrumentation Engineers, 1546. SPIE, Bellingham, Washington, S. 20. ISBN 0-8194-0707-0. Volltext nicht vorhanden.

Beregulin, E., Ganichev, Sergey, Yaroshetskii, I., Lang, P., Schatz, W. und Renk, Karl Friedrich (1991) Generation of intense short FIR pulses by use of a passively mode-locked high- pressure CO_{2} laser as a pump source. In: 16th International Conference on Infrared and Millimeter Waves, 26. - 30. August 1991, Lausanne, Switzerland. Volltext nicht vorhanden.

Beregulin, E., Ganichev, Sergey, Yaroshetskii, I., Lang, P., Schatz, W. und Renk, Karl Friedrich (1991) Generation of intense short FIR pulses by use of a passively mode-locked high- pressure CO_{2} laser as a pump source. In: Tran, Minh Q. und Siegrist, M. R., (eds.) International Conference on Infrared and Millimeter Waves: Conference digest. Proceedings / SPIE, 1576. SPIE, Bellingham, Wash., S. 100. ISBN 0-8194-0707-0.

Schneider, G., Lengfellner, Hans, Betz, J., Renk, Karl Friedrich und Prettl, Wilhelm (1991) Infrared Detection By Tl-Ba-Ca-Cu-O Superconducting Films. International journal of infrared and millimeter waves 12 (1), S. 1-7.

1990

Lengfellner, Hans, Schnellbögl, Andreas, Betz, Josef, Prettl, Wilhelm und Renk, Karl Friedrich (1990) Nernst effect by laser-pulse heating in Tl-Ba-Ca-Cu-O superconducting thin films. Physical Review B (PRB) 42 (10), S. 6264-6267.

Lang, P., Schatz, W., Renk, Karl Friedrich, Beregulin, E., Ganichev, Sergey und Yaroshetskii, I. (1990) Generation of far-infrared pulses by use of a passively mode-locked high-pressure CO_{2} laser. International Journal of Infrared and Millimeter Waves 11 (7), S. 851-856.

Beregulin, E., Ganichev, Sergey, Yaroshetskii, I., Lang, P., Schatz, W. und Renk, Karl Friedrich (1990) Devices for generation and detection of subnanosecond IR and FIR radiation pulses. In: Int. Conf. on Physical Concepts of Materials for Novel Optoelectronic Device Applications, 28. Oktober - 2. November 1990, Aachen, Germany. Volltext nicht vorhanden.

Beregulin, E., Ganichev, Sergey, Yaroshetskii, I., Lang, P., Schatz, W. und Renk, Karl Friedrich (1990) Devices for generation and detection of subnanosecond IR and FIR radiation pulses. In: Razeghi, Manijeh, (ed.) Physical concepts of materials for novel optoelectronic device applications II: Device physics and applications. SPIE, Bellingham, Washington, S. 853-861.

Andrä, W., Betz, J., Brunner, B., Hergt, R., Lengfellner, Hans, Renk, Karl Friedrich, Schüppel, W. und Steenbeck, K. (1990) In-plane Rotational Magnetic Losses In A Laser Deposited YBa₂Cu₃O₇−x Film. Physica status solidi A, Applied research 122 (2), K161-K163.

Schneider, G., Lengfellner, Hans, Betz, J., Renk, Karl Friedrich und Prettl, Wilhelm (1990) Infrared Detection by Tl-Ba-Ca-Cu-O superconducting Films. In: Temkin, Richard J., (ed.) Conference digest: Fifteenth International Conference on Infrared and Millimeter Waves: 10-14 December 1990, Orlando, Florida. Proceedings of the International Society for Optical Engineering, 1514. SPI, Bellingham, Washington, USA, S. 104. ISBN 0-8194-0623-6. Volltext nicht vorhanden.

Lengfellner, Hans, Schnellbögl, A., Betz, J., Renk, Karl Friedrich und Prettl, Wilhelm (1990) Nernst effect by pulsed infrared laser heating in Tl-Ba-Ca-Cu-O high-Tc superconduction films. In: Temkin, Richard J., (ed.) Conference digest: Fifteenth International Conference on Infrared and Millimeter Waves: 10-14 December 1990, Orlando, Florida. Proceedings of the International Society for Optical Engineering, 1514. SPI, Bellingham, Washington, USA, S. 107. ISBN 0-8194-0623-6. Volltext nicht vorhanden.

Lengfellner, Hans, Schnellbögl, Andreas, Betz, Josef, Renk, Karl Friedrich und Prettl, Wilhelm (1990) Nernst effect in Tl-Ba-Ca-Cu-O superconducting films due to infrared laser heating. International Journal of Infrared and Millimeter Waves 11 (5), S. 631-639.

Lengfellner, Hans, Schnellbögl, Andreas, Betz, Josef, Prettl, Wilhelm und Renk, Karl Friedrich (1990) Nernst effect in a high temperature superconductor. Physica B Condensed Matter 165/16 (2), S. 1219-1220.

Lengfellner, Hans, Schnellbögl, A., Betz, J., Prettl, Wilhelm und Renk, Karl Friedrich (1990) Saturation of Photoionization of Shallow Acceptors in p-Ge. In: Temkin, Richard J., (ed.) Conference digest: Fifteenth International Conference on Infrared and Millimeter Waves: 10-14 December 1990, Orlando, Florida. Proceedings of the International Society for Optical Engineering, 1514. SPI, Bellingham, Washington, USA, S. 372. ISBN 0-8194-0623-6. Volltext nicht vorhanden.

Renk, Karl Friedrich, Betz, J., Schützmann, J., Prückl, A., Brunner, B. und Lengfellner, Hans (1990) Use of high Tc superconductors for far‐infrared Fabry–Perot resonators. Applied Physics Letters 57 (20), S. 2148-2149.

1989

Renk, Karl Friedrich, Ose, W., Zetterer, T., Schützmann, J., Lengfellner, Hans, Otto, H. H., Keller, J., Roas, B., Schultz, L. und Saemann-Ischenko, G. (1989) Far infrared reflectivity of Tl2Ba2CaCu2O8 and YBa2Cu3O7 ceramics and of an oriented YBa2Cu3O7 thin film. Infrared physics 29 (2-4), S. 791-798.

Lengfellner, Hans, Betz, J. und Renk, Karl Friedrich (1989) Preparation of Tl-Ba-Ca-Cu-O thin films by diffusion of Tl into laser evaporated Ba2Ca2Cu3Ox films. Applied Physics A: Materials Science & Processing 48 (5), S. 501-502.

Lengfellner, Hans, Renk, Karl Friedrich, Fickenscher, P. und Schindler, W. (1989) Preparation of Y-Ba-Cu-O thin films by laser evaporation with near-infrared radiation. Journal of Physics D: Applied Physics 22 (2), S. 323-326.

Zetterer, T., Ose, W., SChützmann, J., Otto, H. H., Obermayer, P. E., Tasler, N., Lengfellner, Hans, Lugert, G., Keller, J. und Renk, Karl Friedrich (1989) Preparation, characterization, and far-infrared study of ceramic high-Tc superconductors. Journal of the Optical Society of America B: Optical Physics (JOSA B) 6 (3), S. 420-435.

Retzer, N., Lengfellner, Hans und Renk, Karl Friedrich (1989) Resonance trapping of monochromatically generated 29 CM-1 phonons in strongly excited ruby crystals. Journal of Luminescence 43 (4), S. 243-249.

Betz, J., Lengfellner, Hans, Duschl, E., Meidenbauer, K. und Renk, Karl Friedrich (1989) Superconducting Tl-Ca-Ba-Cu-O thin films prepared by diffusion of Tl into an excimer laser ablated Ca2Ba2Cu3Ox film. Physica C: Superconductivity and its Applications 162-164 (Part 1), S. 133-134.

1988

Ose, W., Obermayer, P. E., Otto, H. H., Zetterer, T., Lengfellner, Hans, Tasler, N., Keller, J. und Renk, Karl Friedrich (1988) Far-infrared reflectivity and dynamical conductivity of YBa2Cu3O7. Physica C: Superconductivity and its Applications 153-15 (Part 2), S. 639-640.

Ose, W., Obermayer, P. E., Otto, H. H. , Zetterer, T., Lengfellner, Hans, Keller, J. und Renk, Karl Friedrich (1988) Far-infrared reflectivity of sintered YBa2Cu3O7 in the normal and superconducting state. Zeitschrift für Physik B: Condensed Matter 70 (3), S. 307-316.

1987

Renk, Karl Friedrich, Lengfellner, Hans, Obermayer, P. E., Ose, W., Otto, H. H., Zetterer, T., Schindler, W. und Saemann-Ischenko, G. (1987) Far infrared reflectance of a mixed phase Y-Ba-Cu-O superconductor. International journal of infrared and millimeter waves 8 (12), S. 1525-1530.

1983

Retzer, N., Lengfellner, Hans und Renk, Karl Friedrich (1983) Homogeneously broadened far-infrared absorption line due to the Ebar-]2abar transition of excited chromium ions in ruby. Physics Letters A 96 (9), S. 487-490.

Lengfellner, Hans, Hummel, J., Netter, H. und Renk, Karl Friedrich (1983) Temperature dependence of the Ebar-]2abar far-infrared absorption line of excited chromium ions in ruby. Optics Letters 8 (4), S. 220-222.

1981

Lengfellner, Hans und Renk, Karl Friedrich (1981) Anharmonic Decay of Zone-Boundary Phonons Observed by a New Method of Phonon Detection. Physical review letters 46 (18), S. 1210-1212.

Lengfellner, Hans, Werling, U., Hummel, J., Netter, H., Retzer, N. und Renk, Karl Friedrich (1981) Concentration dependence of the Ebar-]2abar far-infrared transition of excited chromium ions in ruby. Solid State Communications 38 (12), S. 1215-1217.

Lengfellner, Hans und Renk, Karl Friedrich (1981) Detection Of acoustic zone-boundary phonons by phonon difference absorption. Journal de physique 42 (C6), S. 259-261. Volltext nicht vorhanden.

1980

Lengfellner, Hans, Rindt, R. und Renk, Karl Friedrich (1980) Far-infrared laser spectroscopy of phonon difference band absorption in TlCl. Zeitschrift für Physik B: Condensed Matter 39 (1), S. 11-14.

1978

Lengfellner, Hans und Renk, Karl Friedrich (1978) Zeeman spectroscopy on excited Cr-3+ in Al2o3 with a far-infrared laser. Semiconductors and insulators 3 (2-3), S. 113-120.

1977

Lengfellner, Hans und Renk, Karl Friedrich (1977) Quantum counter for far-infrared radiation. IEEE Journal of Quantum Electronics 13 (6), S. 421-424.

1976

Lengfellner, Hans, Pauli, G., Heisel, W. und Renk, Karl Friedrich (1976) Tunable Quantum Counter For Far-Infrared Radiation. Applied Physics Letters 29 (9), S. 566-567.

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