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Article

Jain, Manish and Appel, Helmut and Meier, Alexander and Wegscheider, Werner and 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), pp. 441-446.

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

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

Demarina, N. V. and 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.

Klappenberger, Florian and Alekseev, K. and Renk, Karl Friedrich and Scheuerer, R. and Schomburg, Ekkehard and Allen, S. and Ramian, G. and Scott, J. and Kovsh, A. and Ustinov, V. and 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), pp. 483-489.

Scheuerer, Roland and Pavelev, Dimitri and Renk, Karl Friedrich and Schomburg, Ekkehard (2004) Frequency multiplication using induced dipole domains in a semiconductor superlattice. Physica E 22 (4), pp. 797-803.

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

Klappenberger, Florian and 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), pp. 429-438.

Klappenberger, Florian and 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), pp. 1405-1414.

Klappenberger, Florian and Renk, Karl Friedrich and Summer, Raimund Franz and Keldysh, Leonid and Rieder, Bernhard and 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), pp. 704-706.

Klappenberger, Florian and Renk, Karl Friedrich and Summer, R. and Keldysh, Leonid and Rieder, Bernhard and 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), pp. 704-706.

Schomburg, Ekkehard and Demarina, Nataliya and 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), p. 155302.

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

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

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

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

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

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

Renk, Karl Friedrich and Betz, J. and Zeuner, S. and Lengfellner, Hans and 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), pp. 37-40.

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

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

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

Bespalov, A. V. and Schilz, A. and Prettl, Wilhelm and Fischer, W. W. and 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), pp. 6312-6315.

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

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

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

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

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

Lengfellner, Hans and Schnellbögl, Andreas and Betz, Josef and Prettl, Wilhelm and 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), pp. 6264-6267.

Lang, P. and Schatz, W. and Renk, Karl Friedrich and Beregulin, E. and Ganichev, Sergey and 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), pp. 851-856.

Andrä, W. and Betz, J. and Brunner, B. and Hergt, R. and Lengfellner, Hans and Renk, Karl Friedrich and Schüppel, W. and 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.

Lengfellner, Hans and Schnellbögl, Andreas and Betz, Josef and Renk, Karl Friedrich and 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), pp. 631-639.

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

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

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

Lengfellner, Hans and Betz, J. and 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), pp. 501-502.

Lengfellner, Hans and Renk, Karl Friedrich and Fickenscher, P. and 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), pp. 323-326.

Zetterer, T. and Ose, W. and SChützmann, J. and Otto, H. H. and Obermayer, P. E. and Tasler, N. and Lengfellner, Hans and Lugert, G. and Keller, J. and 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), pp. 420-435.

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

Betz, J. and Lengfellner, Hans and Duschl, E. and Meidenbauer, K. and 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), pp. 133-134.

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

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

Renk, Karl Friedrich and Lengfellner, Hans and Obermayer, P. E. and Ose, W. and Otto, H. H. and Zetterer, T. and Schindler, W. and 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), pp. 1525-1530.

Retzer, N. and Lengfellner, Hans and 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), pp. 487-490.

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

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

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

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

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

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

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

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

Book Section

Lengfellner, Hans and Kremb, G. and Betz, J. and Renk, Karl Friedrich and Prettl, Wilhelm (1993) Giant voltages upon surface heating in normal YBa2Cu3O7−δ films explained by an atomic layer thermopile. In: Kuzmany, Hans and Mehring, M. and 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, pp. 278-281. ISBN 3-540-56195-1; 0-387-56195-1.

Golubev, V. A. and Schilz, A. and Prettl, Wilhelm and 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, p. 296. ISBN 0-8194-1163-9.

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

Scherzl, K and Hogan, M. and Simms, D. and Betz, J. and Blau, W. and Lengfellner, Hans and Renk, Karl Friedrich and Prettl, Wilhelm (1991) FIR response of HTC Tl-Ba-Ca-Cu-O Films. In: Siegrist, M. R. and Tran, M. Q. and 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, p. 20. ISBN 0-8194-0707-0.

Beregulin, E. and Ganichev, Sergey and Yaroshetskii, I. and Lang, P. and Schatz, W. and 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. and Siegrist, M. R., (eds.) International Conference on Infrared and Millimeter Waves: Conference digest. Proceedings / SPIE, 1576. SPIE, Bellingham, Wash., p. 100. ISBN 0-8194-0707-0.

Beregulin, E. and Ganichev, Sergey and Yaroshetskii, I. and Lang, P. and Schatz, W. and 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, pp. 853-861.

Schneider, G. and Lengfellner, Hans and Betz, J. and Renk, Karl Friedrich and 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, p. 104. ISBN 0-8194-0623-6.

Lengfellner, Hans and Schnellbögl, A. and Betz, J. and Renk, Karl Friedrich and 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, p. 107. ISBN 0-8194-0623-6.

Lengfellner, Hans and Schnellbögl, A. and Betz, J. and Prettl, Wilhelm and 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, p. 372. ISBN 0-8194-0623-6.

Monograph

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

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

Conference or Workshop Item

Klappenberger, F. and Renk, Karl Friedrich and Schomburg, Ekkehard and Summer, R. and Ganichev, Sergey and 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.

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

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

Beregulin, E. and Ganichev, Sergey and Yaroshetskii, I. and Lang, P. and Schatz, W. and 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.

Beregulin, E. and Ganichev, Sergey and Yaroshetskii, I. and Lang, P. and Schatz, W. and 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.

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