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Research Project: PI-OXIDE: Photonic integrated devices in activated amorphous and crystalline oxides
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2012

Pollnau, M. and Geskus, D. and Bernhardi, E.H. and van Dalfsen, K. and Wörhoff, K. and de Ridder, R.M. (2012) Highly efficient solid-state waveguide lasers. (Invited) In: Advanced Solid-State Photonics, ASSP 2012 - Semiconductor and Waveguide Lasers, 29 Jan - 03 Feb 2012, San Diego, California, USA. AM5A.1. Optical Society of America. ISBN 978-1-55752-933-6

2011

Ay, F. and Gadgil, V.J. and Geskus, D. and Aravazhi, S. and Wörhoff, K. and Pollnau, M. (2011) Application of focused ion beam technology for photonic nanostructures. In: Technical Proceedings of the 2011 NSTI Nanotechnology Conference & Expo - Nanotech 2011, 13-16 June 2011, Boston, Massachusetts. pp. 200-203. CRC Press. ISBN 978-1-4398-7139-3
Bradley, J.D.B. and Pollnau, M. (2011) Erbium-doped integrated waveguide amplifiers and lasers. Laser & Photonics Reviews, 5 (3). pp. 368-403. ISSN 1863-8880 *** ISI Impact 7,486 ***
Wörhoff, K. and Bernhardi, E.H. and Bradley, J.D.B. and Yang, Jing and Agazzi, L. and Ay, F. and de Ridder, R.M. and Pollnau, M. (2011) Rare-earth-ion doped amplifiers and lasers integrated on silicon. (Invited) In: 13th International Conference on Transparent Optical Networks, ICTON 2011, 26-30 June 2011, Stockholm, Sweden. pp. 1-4. IEEE. ISBN 978-1-4577-0882-4
Wörhoff, K. and de Ridder, R.M. and Hoekstra, H.J.W.M. and Pollnau, M. (2011) Integrated light sources and optical sensors. Fotonica Magazine, 36 (1). pp. 9-17. ISSN 1871-7802

2010

Ay, F. and Bernhardi, E.H. and Agazzi, L. and Bradley, J.D.B. and Wörhoff, K. and Pollnau, M. and de Ridder, R.M. (2010) Characterization of Bragg gratings in Al2O3 waveguides fabricated by focused ion beam milling and laser interference lithography In: Conference on Lasers and Electro-Optics, 16-21 May 2010, San Jose, CA. CMQ4. Optical Society of America. ISBN 978-1-55752-889-6
Ay, F. and de Ridder, R.M. and Pollnau, M. (2010) Focused Ion Beam Nano-structuring for Applications in Photonics. (Invited) In: International Workshop in Cleanroom Training, UNAM, 21 June - 4 July 2010, Ankara, Turkey. 384. Bilkent University Press. ISBN not assigned
Bernhardi, E.H. and Wörhoff, K. and Bradley, J.D.B. and de Ridder, R.M. and Pollnau, M. (2010) Integrated Al2O3:Er3+ microring and distributed feedback lasers on silicon In: Symposium K: Rare earth doped materials for optical based technologies, 7-11 June 2010, Strasbourg. pp. 5-6. E-MRS 2010 Spring Meeting. European Materials Research Society (E-MRS). ISBN not assigned
Bradley, J.D.B. and Agazzi, L. and Geskus, D. and Ay, F. and Wörhoff, K. and Pollnau, M. (2010) Gain bandwidth of 80 nm and 2 dB/cm peak gain in Al2O3:Er3+ optical amplifiers on silicon Journal of the Optical Society of America B (Optical physics), 27 (2). pp. 187-196. ISSN 0740-3224 *** ISI Impact 1,731 ***
Bradley, J.D.B. and Costa e Silva, M. and Gay, M. and Bramerie, L. and Driessen, A. and Wörhoff, K. and Simon, J.C. and Pollnau, M. (2010) 170 Gbit/s transmission in Al2O3:Er3+ integrated amplifiers In: Conference on Lasers and Electro-Optics, 16-21 May 2010, San Jose, CA. ATuB5. Optical Society of America. ISBN 978-1-55752-889-6
Bradley, J.D.B. and Stoffer, R. and Agazzi, L. and Ay, F. and Wörhoff, K. and Pollnau, M. (2010) Integrated Al2O3:Er3+ ring lasers on silicon with wide wavelength selectivity Optics letters, 35 (1). pp. 73-75. ISSN 0146-9592 *** ISI Impact 3,040 ***
Bradley, J.D.B. and Stoffer, R. and Agazzi, L. and Ay, F. and Wörhoff, K. and Pollnau, M. (2010) Widely wavelength-selective integrated ring laser in Al2O3:Er3+ In: Conference on Lasers and Electro-Optics, 16-21 May 2010, San Jose, CA. CMQ2. Optical Society of America. ISBN 978-1-55752-889-6
Bradley, J.D.B. and Stoffer, R. and Bakker, A.F. and Agazzi, L. and Ay, F. and Wörhoff, K. and Pollnau, M. (2010) Integrated Al2O3:Er3+ zero-loss optical amplifier and power splitter with 40 nm bandwidth IEEE photonics technology letters, 22 (5). pp. 278-280. ISSN 1041-1135 *** ISI Impact 1,945 ***
Pollnau, M. and Bradley, J.D.B. and Ay, F. and Bernhardi, E.H. and de Ridder, R.M. and Wörhoff, K. (2010) On-chip integrated lasers in Al2O3:Er on silicon (Invited) In: Photonics West, 23-28 Jan 2010, San Francisco, California, USA. 76050M. Proceedings of the SPIE 7605. SPIE, the international Society for Optical Engineering. ISSN 0277-786X
Pollnau, M. and Bradley, J.D.B. and Yang, Jing and Bernhardi, E.H. and de Ridder, R.M. and Wörhoff, K. (2010) Rare-earth-ion doped waveguide amplifiers and lasers in alumina and polymers. (Invited) In: Frontiers in Optics, FIO 2010 - Novel Hybrid Integration II, 24-28 October 2010, Rochester, NY. Paper FWD1. OSA Technical Digest. Optical Society of America. ISBN 978-1-55752-921-3
Wörhoff, K. and Bradley, J.D.B. and Agazzi, L. and Pollnau, M. (2010) Rare-earth-ion-doped Al2O3 for integrated optical amplification (Invited) In: Photonics West, 23-28 Jan 2010, San Francisco, California, USA. 760408. Proceedings of the SPIE 7604. SPIE, the international Society for Optical Engineering. ISSN 0277-786X ISBN 9780819480002

2009

Ay, F. and Bradley, J.D.B. and Wörhoff, K. and de Ridder, R.M. and Pollnau, M. (2009) Optical performance investigation of focused ion beam nanostructured integrated Fabry-Perot microcavities in Al2O3 In: Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, 14-19 June 2009, Munich, Germany. CK.P.1 MON. IEEE Computer Society. ISBN 978-1-4244-4079-5
Bradley, J.D.B. (2009) Al2O3:Er3+ as a gain platform for integrated optics PhD thesis, University of Twente. ISBN 978-90-365-2877-1
Bradley, J.D.B. and Agazzi, L. and Geskus, D. and Ay, F. and Wörhoff, K. and Pollnau, M. (2009) 2.0 dB/cm gain in an Al2O3:Er3+ waveguide on silicon In: Conference on Lasers and Electro-Optics, 2-4 June 2009, Baltimore, Maryland, USA. CThCC2. Optical Society of America. ISBN 978-1-55752-869-8
Bradley, J.D.B. and Costa e Silva, M. and Gay, M. and Bramerie, L. and Driessen, A. and Wörhoff, K. and Simon, J.C. and Pollnau, M. (2009) 170 GBit/s transmission in an erbium-doped waveguide amplifier on silicon. Optics Express, 17 (24). pp. 22201-22208. ISSN 1094-4087 *** ISI Impact 3,148 ***
Bradley, J.D.B. and Gay, M. and Simon, J.C. and Wörhoff, K. and Pollnau, M. (2009) 40 Gbit/s transmission in a silicon-compatible Al2O3:Er3+ integrated optical amplifier In: Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, 14-19 June 2009, Munich, Germany. CI4.3 TUE. IEEE. ISBN 978-1-4244-4079-5
van Dalfsen, K. (2009) Nd:Al2O3 as a Gain Material for Integrated Devices Master's thesis, University of Twente.
Kahn, A. and Heinrich, S. and Kühn, H. and Petermann, K. and Bradley, J.D.B. and Wörhoff, K. and Pollnau, M. and Huber, G. (2009) Low threshold monocrystalline Nd:(Gd,Lu)2O3 channel waveguide laser Optics express, 17 (6). pp. 4412-4418. ISSN 1094-4087 *** ISI Impact 3,148 ***
Kahn, A. and Kühn, H. and Heinrich, S. and Petermann, K. and Huber, G. and Bradley, J.D.B. and Wörhoff, K. and Pollnau, M. (2009) Low threshold channel waveguide laser in a monocrystalline Nd:(Gd,Lu)2O3 film In: Conference on Lasers and Electro-Optics, 31 May - 05 June 2009, Baltimore, Maryland, USA. CTuP7. Optical Society of America. ISBN 978-1-55752-869-8
Kühn, H. and Heinrich, S. and Kahn, A. and Petermann, K. and Bradley, J.D.B. and Wörhoff, K. and Pollnau, M. and Huber, G. (2009) Monocrystalline Yb3+:(Gd,Lu)2O3 channel waveguide laser at 976.8 nm Optics letters, 34 (18). pp. 2718-2720. ISSN 0146-9592 *** ISI Impact 3,040 ***
Pollnau, M. and Bradley, J.D.B. and Agazzi, L. and Bernhardi, E.H. and Ay, F. and Wörhoff, K. and de Ridder, R.M. (2009) Al2O3:Er3+ as a new platform for active integrated optics (Invited) In: 11th International Conference on Transparent Optical Networks, ICTON '09, 28/06/2009-02/07/2009, Azores. We.D2.1. IEEE. ISBN 978-1-4244-4825-8
Pollnau, M. and Wörhoff, K. and Ay, F. and Geskus, D. and Agazzi, L. and Bradley, J.D.B. (2009) Higher gain in 977-nm-pumped Al2O3:Er3+ integrated optical amplifiers In: Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on, 14-19 June 2009, Munich, Germany. CE1.4 MON. IEEE. ISBN 978-1-4244-4079-5
Wörhoff, K. and Bradley, J.D.B. and Ay, F. and Geskus, D. and Blauwendraat, T.P. and Pollnau, M. (2009) Reliable low-cost fabrication of low-loss Al2O3:Er3+ waveguides with 5.4-dB optical gain IEEE journal of quantum electronics, 45 (5). pp. 454-461. ISSN 0018-9197 *** ISI Impact 1,843 ***

2008

Agazzi, L. and Bradley, J.D.B. and Ay, F. and Kahn, A. and Scheife, H. and Petermann, K. and Huber, G. and de Ridder, R.M. and Wörhoff, K. and Pollnau, M. (2008) Upconversion spectroscopy of Al2O3:Er3+ In: Proceedings of the 13th Annual Symposium of the IEEE LEOS Benelux Chapter, 27-28 November 2008, Enschede, The Netherlands. pp. 51-53. IEEE LEOS Benelux Chapter. ISBN 978-90-365-2768-2
Agazzi, L. and Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. (2008) Spectroscopy and gain in Al2O3:Er waveguides In: International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, 7-11 July 2008, Lyon, France. Paper TuA2-O2. Claude Bernard Lyon 1 University. ISBN not assigned
Ay, F. and Bradley, J.D.B. and de Ridder, R.M. and Wörhoff, K. and Pollnau, M. (2008) Bragg gratings in Al2O3 channel waveguides by focused ion beam milling In: Proceedings of the 13th Annual Symposium of the IEEE LEOS Benelux Chapter, 27,28 November 2008, Enschede, The Netherlands. pp. 215-217. IEEE LEOS Benelux Chapter. ISBN 978-90-365-2768-2
Ay, F. and Uranga, A. and Bradley, J.D.B. and Wörhoff, K. and de Ridder, R.M. and Pollnau, M. (2008) Focused ion beam nano-structuring of Bragg gratings in Al2O3 channel waveguides In: Proceedings of the First Insternational Workshop on FIB for Photonics, Eindhoven, The Netherlands. pp. 48-50. University of Twente. ISBN 978-90-365-2678-4
Bradley, J.D.B. and Agazzi, L. and Geskus, D. and Ay, F. and Wörhoff, K. and Pollnau, M. (2008) Reactively co-sputtered Al2O3:Er3+ for active photonic devices In: 2008 Annual Workshop of the IEEE LEOS Benelux Chapter "Materials, Devices and Systems in Optics and Photonics, 30-5-2008, Brussels, Belgium. pp. 9-10. IEEE LEOS Benelux Chapter. ISBN 978-90-9023255-3
Bradley, J.D.B. and Agazzi, L. and Geskus, D. and Ay, F. and Wörhoff, K. and Pollnau, M. and Arnoldbik, W.M. (2008) Enhanced gain in Er-doped Al2O3 channel waveguide amplifiers In: Proceedings of the 13th Annual Symposium of the IEEE LEOS Benelux Chapter, 27-28 November 2008, Enschede, The Netherlands. pp. 131-134. IEEE LEOS Benelux Chapter. ISBN 978-90-365-2768-2
Bradley, J.D.B. and Agazzi, L. and Geskus, D. and Blauwendraat, T.P. and Ay, F. and Wörhoff, K. and Pollnau, M. (2008) Investigation of optical gain in Al2O3:Er channel waveguide amplifiers In: Technical Digest Conference on Lasers and Electro-Optics, CLEO 2008, 4-9 May 2008, San Jose, California, U.S.A.. Paper JTuA30. Optical Society of America. ISBN 978-1-55752-859-9
Bradley, J.D.B. and Geskus, D. and Blauwendraat, T.P. and Ay, F. and Wörhoff, K. and Pollnau, M. and Kahn, A. and Scheife, H. and Petermann, K. and Huber, G. (2008) Growth, micro-structuring, spectroscopy, and optical gain in as-deposited Al2O3:Er waveguides In: Conference Program and Technical Digest, Advanced Solid-State Photonics: Topical Meeting and Tabletop Exhibit, 27-30 January 2008, Nara, Japan. Paper WB10. Optical Society of America. ISBN 1-55752-850-0
Kahn, A. and Gün, T. and Ileri, B. and Kühn, H. and Petermann, K. and Huber, G. and Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. and Luo, Y. and Hoffmann, P. (2008) Mono-crystalline rare earth doped (Gd,Lu)2O3 waveguiding films produced by pulsed laser deposition and structured by reactive ion etching In: Proceedings Conference on Lasers and Electro-Optics, CLEO 2008, 4-9 May 2008, San Jose, California, U.S.A.. Paper CTuS1. Optical Society of America. ISBN 978-1-55752-859-9
Kahn, A. and Kühn, H. and Heinrich, S. and Gün, T. and Tellkamp, F. and Petermann, K. and Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. and Kuzminykh, Y. and Luo, Y. and Hoffmann, P. and Huber, G. (2008) In-band pumping of expitaxially grown Er:(Gd,Lu)2O3 waveguides for active integrated optical devices In: 3rd EPS-QEOD: Europhoton Conference on Solid-State and Fiber coherent Light sources, 31-8-2008 - 5-9-2008, Paris, France. Paper THoD.2. European Physical Society. ISBN 2-914771-55-X
Kahn, A. and Kühn, H. and Heinrich, S. and Petermann, K. and Bradley, J.D.B. and Wörhoff, K. and Pollnau, M. and Kuzminykh, Y. and Huber, G. (2008) Amplification in epitaxially grown Er:(Gd,Lu)2O3 waveguides for active integrated optical devices Journal of the Optical Society of America B (Optical physics), 25 (11). pp. 1850-1853. ISSN 0740-3224 *** ISI Impact 1,731 ***
Pollnau, M. (2008) Er-doped aluminium oxide waveguide amplifiers. (Invited) In: Book of Abstract Workshop on Sensitized Er Doped Waveguide Amplifier/Laser, 13-15 April 2008, Levico Terme - Trento - Italy. 14. University of Trento Italy and University of Amsterdam, Van der Waals Zeeman Institute. ISBN not assigned
Wörhoff, K. and Bradley, J.D.B. and Agazzi, L. and Geskus, D. and Ay, F. and Kahn, A. and Scheife, H. and Petermann, K. and Huber, G. and Pollnau, M. (2008) Energy-transfer upconversion in Al2O3:Er3+ thin layers In: Second International Workshop on Advanced Spectroscopy and Optical Materials, 13-17 July 2008, Gdansk, Poland. Paper 6-O. Institute of Experimental Physics, Gdansk University. ISBN not assigned
Wörhoff, K. and Bradley, J.D.B. and Ay, F. and Geskus, D. and Blauwendraat, T.P. and Pollnau, M. (2008) Optimization of Al2O3:Er3+ waveguide technology for active integrated optical devices In: Proceedings of SPIE, 7-10 April 2008, Strasbourg, France. 699618. International Society for Optical Engineering. ISSN 0277-786X ISBN 9780819471949

2007

Ay, F. and Bradley, J.D.B. and Hopman, W.C.L. and Gadgil, V.J. and de Ridder, R.M. and Wörhoff, K. and Pollnau, M. (2007) Focused ion beam nano-structuring of Al2O3 dielectric layers for photonic applications In: Book of Abstracts 33rd International Conference on Micro- and Nano-Engineering 2007, 23-26 September 2007, Copenhagen, Denmark. pp. 627-628. Technical University of Denmark. ISSN not assigned ISBN not assigned
Ay, F. and Bradley, J.D.B. and Wörhoff, K. and Pollnau, M. (2007) Towards rare-earth-ion-doped Al2O3 active integrated optical devices (Invited) In: Abstract Collection Booklet of the 6th International Symposium on Modern Optics and Its Applications (ISMOA 2007), 6-10 August 2007, Bandung, Indonesia. pp. 63-66. Bandung Institute of Technology. ISBN not assigned
Bradley, J.D.B. and Ay, F. and Blauwendraat, T.P. and Wörhoff, K. and Pollnau, M. (2007) Rare-earth-ion-doped Al2O3 waveguides for active integrated optical devices In: Proceedings International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems, 28 May - 1 June 2007, Minsk, Belarus. SPIE International. ISSN 0277-786X
Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. (2007) Reactive ion etching of low-loss channel waveguides in Al2O3 and Y2O3 layers In: Book of Abstracts 33rd International Conference on Micro- and Nano-Engineering 2007, 23-26 September 2007, Copenhagen, Denmark. pp. 375-376. Technical University of Denmark. ISBN not assigned
Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. (2007) Low-loss rib waveguides in Al2O3 layers for active integrated optical devices In: Digest of the Conference on Lasers and Electro-Optics Europe (CLEO/Europe-IQEC 2007), 17-22 June 2007, Munich, Germany. CE7-6. European Physical Society. ISBN 1-42440931-4
Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. (2007) Fabrication of low-loss channel waveguides in Al2O3 and Y2O3 layers by inductively coupled plasma reactive ion etching Applied physics B (Lasers and optics), 89 (2-3). pp. 311-318. ISSN 0946-2171 *** ISI Impact 1,785 ***
Bradley, J.D.B. and Geskus, D. and Blauwendraat, T.P. and Ay, F. and Wörhoff, K. and Pollnau, M. (2007) Optimized deposition and structuring of reactively co-sputtered Al2O3:Er waveguide layers with net optical gain In: 12th Annual Symposium IEEE/LEOS Benelux, 17-18 December 2007, Brussels, Belgium. pp. 107-110. IEEE LEOS Benelux Chapter. ISBN 978-2-9600753-0-4
Pollnau, M. (2007) Dielectric Waveguide lasers. (Invited) In: Proceedings International Conference on Lasers, Applications, and Technologies 2007: Advanced Laser Systems, 28 May - 1 June 2007, Minsk, Belarus. SPIE International. ISSN 0277-786X
Pollnau, M. and Grivas, C. and Laversenne, L. and Wilkinson, J.S. and Eason, R.W. and Shepherd, D.P. (2007) Ti:Sapphire waveguide lasers. Laser Physics Letters, 4 (8). pp. 560-571. ISSN 1612-2011 *** ISI Impact 2,391 ***
Uranga, A. and Ay, F. and Bradley, J.D.B. and de Ridder, R.M. and Wörhoff, K. and Pollnau, M. (2007) Focused ion beam nano-structuring of photonic Bragg gratings in Al2O3 waveguides In: 12th Annual Symposium IEEE/LEOS Benelux, 17-18 December 2007, Brussels, Belgium. pp. 247-250. IEEE LEOS Benelux Chapter. ISBN 978-2-9600753-0-4
Wörhoff, K. and Bradley, J.D.B. and Ay, F. and Pollnau, M. (2007) Low-loss Al2O3 waveguides for active integrated optics In: Technical Digest Conference on Lasers and Electro-Optics, CLEO 2007, 6-11 May 2007, Baltimore, Maryland, U.S.A.. CMW5. Optical Society of America. ISBN 1-55752-834-9

2006

Ay, F. and Wörhoff, K. and Bradley, J.D.B. and Pollnau, M. (2006) Reliable fabrication of low-loss Al2O3 waveguides for active integrated optics In: 2nd EPS-QEOD Europhoton Conference on Solid-State and Fiber Coherent Light Sources - Europhysics Conference Abstracts, 10-15 September 2006, Pisa, Italy. TuC2. European Physical Society. ISBN 2-914771-41-X
Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. (2006) AL2O3 and Y2O3 Thin Films for Active Integrated Optical Waveguide Devices In: 11th Annual Symposium IEEE/LEOS Benelux, 30 November - 1 December 2006, Eindhoven, The Netherlands. pp. 113-116. IEEE LEOS Benelux Chapter. ISBN 978-90-6144-989-8
Bradley, J.D.B. and Ay, F. and Wörhoff, K. and Pollnau, M. (2006) Reactive Ion Etching of Y2O3 films applying F-, Cl- and Cl/Br-based Inductively Coupled Plasmas In: Science and Technology of Dielectrics for Active and Passive Photonic Devices, 29 Oct - 3 Nov 2006, Cancun, Mexico. pp. 117-124. ECS Transactions 3 (11). The Electrochemical Society. ISBN 1-56677-515-9
Wörhoff, K. and Ay, F. and Pollnau, M. (2006) Optimization of Low-Loss AL2O3 Waveguide Fabrication for Application in Active Integrated Optical Devices In: Science and Technology of Dielectrics for Active and Passive Photonic Devices, 29 Oct - 3 Nov 2006, Cancun, Mexico. pp. 17-26. ECS Transactions 3 (11). Electrochemical Society, Inc.. ISBN 1-56677-515-9

2005

Pollnau, M. (2005) How to optimize gain in solid-state dielectric media. (Invited) In: Book of Abstracts IEEE LEOS Benelux Annual Workshop - Lasing and amplification in solid state materials, 20 May 2005, Eindhoven, The Netherlands. 2/9. IEEE Lasers and Electro-Optics Society. ISBN not assigned

2004

Grivas, C. and May-Smith, T.C. and Shepherd, D.P. and Eason, R.W. and Pollnau, M. and Jelinek, M. (2004) Broadband single-transverse-mode fluorescence sources based on ribs fabricated in pulsed laser deposited Ti: sapphire waveguides. Applied physics A (Materials science and processing), 79 (4-6). pp. 1195-1198. ISSN 0947-8396 *** ISI Impact 1,444 ***