Optics & Photonics in Sweden 2014 (OPS)
11-12 November 2014
Chalmers University of Technology|Gothenburg
GENERAL INFORMATION
The Optics & Photonics in Sweden (OPS) 2014
conference will be held 11 - 12 November 2014 at
Chalmers University of Technology in Göteborg. The
conference is organised by PhotonicSweden and the
Swedish Optical Society. More information:
www.photonicsweden.org
GENERAL CHAIR
Anders Larsson, Chalmers University of Technology
PROGRAMME COMMITTEE
Anders Larsson, Chalmers University of Technology
Stefan Andersson-Engels, Lund University
Gunnar Björk, Royal Institute of Technology (KTH)
Michael Cohn, Parameter AB
Elizabeth Illy, Cobolt AB
Daniel Karlsson , Gasporox AB
Fredrik Nikolajeff, University of Uppsala
Ewa Orlovska, Hamamatsu
Lars Rymell, Eclipse
Lennart BM Svensson, PhotonicSweden
ABSTRACT SUBMISSION FOR
POSTER PRESENTATIONS
Authors are requested to submit an abstract of a half to
one page (font 11, including figures and references)
Contributions will be accepted for poster presentation.
All authors are requested to register for the meeting
separately from abstract submission.
Required poster size: The posters should have a
maximum size of DIN A0 (841 x 1189 mm) preferably
in a portrait format (not landscape format). Pins and
similar pads will be provided by the organizer.
Abstracts can be sent to [email protected]
Deadline for abstracts: 27th of October 2014
SPONSORING OPPORTUNITIES
Various sponsoring opportunities are available for this
conference.Present your company and benefit from the
opportunity of face-to-face contacts with our attendees!
Further information is available in the
OPS exhibitors and sponsor guide.
INVITED TALKS
will cover a variety of topics in Optics and Photonics,
reflecting current Swedish research and development at
universities, institutes and industry.
KEYNOTE SPEAKERS
will highlight European research and developments.
A POSTER SESSION
will provide an additional opportunity to display the
most recent developments and achievements. It will also
give an overview of Optics and Photonics in Sweden and
offer a good platform for creating new collaborations.
AN EXHIBITION AND A SESSION WITH
COMPANY PRESENTATIONS
will be held parallel to the scientific sessions to provide
industry, institutes and associations an opportunity to
display their products and services and bridge the gap
between science and industry.
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FURTHER INFORMATION
For further information please go to:
www.photonicsweden.org
CONFERENCE VENUE
Chalmers Konferens
Main entrance of
Chalmers University of Technology
Chalmersplatsen 1
SE-41258 Gothenburg
PARKING
Parking next to Chalmers Conference Centre is along
Sven Hultin Street. It costs 15 SEK/ hour between the
hours 07:00 to 18:00. At other times, 2 SEK/ hour.
REGISTRATION
REGISTRATION FOR PARTICIPANTS
REGISTRATION FOR EXHIBITORS
The registration Deadline for Online-registration is at
26th October.
The registration Deadline for Online-registration is at
26th October.
REGISTRATION FEES
3.500 kr incl. VAT
Non Members
2.875 kr incl. VAT
Personal Members of
PhotonicSweden
1.500 kr incl. VAT
Student Members & Pensioner
Members of PhotonicSweden
1.500 kr incl. VAT
Invited Speakers
EXHIBITION FEES
11.600 kr
+ 25% VAT
9.800 kr
+ 25% VAT
Observe that all Swedish participants must pay 25%
VAT (Moms). The option without VAT is only for VATregistered companies outside Sweden.
Observe that all Swedish exhibitors must pay 25% VAT
(Moms). The option without VAT is only for VATregistered companies outside Sweden.
All fees includes one person conference fee and all
lunches & coffee breaks and dinner.
All fees includes one person conference fee and all
lunches & coffee breaks and dinner. Exhibition stand will
be selected based on registration order. Map of exhibition floor will later be sent out to exhibitors.
Personal annual member fee is 350 SEK/Year and student & pensioner annual member fee is 110 SEK/Year.
As an economic association an additional member insert
of 100 SEK will be charged for new members (only one
time). Personal membership includes membership in PhotonicSweden, Svenska OptikSällskapet and European
Optical Society.
Accommodation
You can book hotel rooms at Hotel Panorama in Gothenburg for a discounted price by using booking code
2028R269201 - Discounted price of 935 SEK incl VAT
and breakfast.
2.300 kr
+ 25% VAT
Non Members
(incl. one person participation fee)
Company Members of
PhotonicSweden
(incl. one person participation fee)
additional exhibitors colleagues
(incl. one person participation fee)
Accommodation
You can book hotel rooms at Hotel Panorama in Gothenburg for a discounted price by using booking code
2028R269201 - Discounted price of 935 SEK incl VAT
and breakfast.
The registration for exhibitors is at:
OPS2014-Exhibitors
The registration for conference participation is at:
OPS2014-Participants
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HOTEL LIST
Quality Hotel Panorama
Box 24037
400 22 Göteborg
To make the reservation please contact:
T: +46 (0)31 - 767 70 44
F: +46 (0)31 - 767 70 70
E: [email protected]
W: www.panorama.se
To obtain contract prices please refer to
the booking code: 2028R269201
Price: 935 SEK/night
OTHER HOTELS CLOSE TO
CHALMERS UNIVERSITY OF TECHNOLOGY
(CAMPUS JOHANNEBERG):
NORMAL STANDARD
Hotel Poseidon
Storgatan 33
411 38 Göteborg
T: +46 (0)31 - 100 550
F: +46 (0)31 - 13 83 91
E: [email protected]
W: www.hotelposeidon.com
Spar Hotel Gårda KB
Norra Kustbanegatan 15-17
416 64 Göteborg
T: +46 (0)31 - 752 03 00
F: +46 (0)31 - 752 03 99
E: [email protected]
W: www.sparhotel.se
HIGH STANDARD
Hotel Onyxen
Sten Sturegatan 23
412 52 Göteborg
T: +46 (0)31 - 81 08 45
F: +46 (0)31 - 16 56 72
E: [email protected]
W: www.hotellonyxen.se/en
Grand Hotel Opera
Nils Ericsonsgatan 23
xxx
T: +46 (0)31 - 80 50 80
F: +46 (0)31 - 80 58 17
Epost: [email protected]
www.grandhotelopera.se
VERY HIGH STANDARD
Hotel Lorensberg
Berzeliigatan 15
412 53 Göteborg
T: +46 (0)31 - 81 06 00
F: +46 (0)31 - 20 50 73
E: [email protected]
W: www.hotel-lorensberg.se
Elite Plaza Hotel
Västra Hamngatan 3
Box 11065
404 22 Göteborg
Tel: 031-720 40 00
Fax: 031-720 40 10
[email protected]
www.elite.se/sv/hotell/goteborg/plaza
HOTELS IN CENTRAL GOTHENBURG
(AND NEVERTHELESS CLOSE TO CHALMERS):
First Hotel Avalon
Kungstorget 9
411 17 Göteborg
T: +46 (0)31 - 751 02 00
E: [email protected]
W: www.avalonhotel.se
NORMAL STANDARD
Best Western Hotel Göteborg
Skeppsbroplatsen 1
411 18 Göteborg
T: +46 (0)31 - 752 28 00
F: +46 (0)31 - 752 28 08
E: [email protected]
W: www.hotellgoteborg.se
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KEYNOTE SPEAKERS
GRAPHENE PHOTONICS AND OPTOELECTRONICS
THE FUTURE OF SEMICONDUCTOR PHOTOSENSING
Andrea C. Ferrari
Cambridge Graphene Centre, University of Cambridge,
CB3 OFA, UK
Prof. Dr. Peter Seitz
Head, Hamamatsu Photonics Innovation Center Europe;
Adjunct Professor of Optoelectronics, EPFL Lausanne;
Deputy Managing Director, Innovation and Entrepreneurship Lab, ETH Zurich, Switzerland
Graphene has great potential in photonics and
optoelectronics, where the combination of its unique
optical and electronic properties can be fully
exploited, the absence of a bandgap can be
beneficial, and the linear dispersion of the Dirac
electrons enables ultra-wide-band tunability [1-3].
Despite being a single atom thick, graphene can be
optically visualized [4]. The linear dispersion of the
Dirac electrons enables broadband applications.
Saturable absorption is observed as a consequence of
Pauli blocking [5,6] and can be exploited for modelocking and Q switching of a variety of ultrafast and
broadband lasers [1,5-7]. Chemical and physical
treatments enable luminescence [1,7]. Graphene and
other two-dimensional materials are also ideal as
photodetection platforms [1-3]. The versatility of these
material systems enables their application in areas
including ultrafast and ultrasensitive detection of light
in the ultraviolet, visible, infrared and terahertz
frequency ranges [1-3,9-12]. These detectors can be
integrated with other photonic components based on
the same material, as well as with silicon photonic and
electronic technologies. By combining graphene with
plasmonic nanostructures, the efficiency of graphenebased photodetectors can be increased, because of
efficient field concentration in the area of a p-n
junction [9]. Light-graphene interaction can be tailored
by using microcavities [10].
This year, more than two billion solid-state image sensors will be produced, with an ever-increasing number
of pixels on each chip. Besides pixel density, there is
much room for improved photosensor capabilities such
as image acquisition speed, spectral sensitivity (from X
-ray to infrared radiation), single-photon resolution,
dynamic range, etc.
“Smarter” pixels and image sensors are of huge interest to photosensing tasks in areas such as medical diagnostics, environmental sensing and monitoring, highprecision metrology, safety and security, consumer
electronics, waste treatment and recycling, food safety, building control, cleaner combustion in vehicles and
homes, wellness, anti-counterfeiting, non-destructive
testing and in-line quality control, etc.
The presentation will review the current situation, technological trends and research challenges, and it will
describe in which way disruptive innovations in photosensing will come about.
[1]
[2]
[3]
[4]
[5]
[6]
A. C. Ferrari et al. Nanoscale 10.1039/c4nr01600a (2014)
F. Bonaccorso et al. Nature Photon. 4, 611 (2010)
F.H.L. Koppens et al. Nature Nano 9, 780 (2014)
C. Casiraghi et al. Nano Lett. 7, 2711 (2007).
T. Hasan, et al. Adv. Mat. 21,3874 (2009)
Z. Sun et al. ACS Nano 4, 803 (2010); Nano Research 3,
653 (2010)
[7] C.A. Zaugg et al. Optics Exp. 21, 31548 (2013)
[8] T. Gokus et al. ACS Nano 3, 3963 (2009)
[9] T.J. Echtermeyer et al. Nature Commun. 2, 458 (2011)
[10] M. Engel et al. Nature Commun 3, 306 (2012)
[11] L. Vicarelli et al. Nature Materials, 11, 865 (2012)
[12] T.J. Echtermeyer et al. Nano Lett., 14, 3733 (2014)
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CONFERENCE SCHEDULE
Room: Runan
Room: Scaniasalen
TUESDAY, 11 NOVEMBER 2014
08:30-10:00
On-site registration and welcome coffee
Room: Nedre Foajén i Kårhuset
10:00-10:15
Opening Remarks
Magnus Breidne, PhotonicSweden; Anders Larsson, Chalmers University of Technology
Room: Runan
10:15-11:00
Keynote Talk
The Future of Semiconductor Photosensing
Peter Seitz, Hamamatsu/École Polytechnique Fédérale de Lausanne
Session Chair
Anders Larsson
11:00-12:00
Room: Runan
Exhibitor Presentations
Exhibitor Pitch Talks
Session Chair
Lennart B.M. Svensson
12:00-13:20
Lunch & Poster Session
Room: Volvofoajén
13:20-15:00
Session A1 | Bio-Medical Photonics
13:20-14:00
Session B1 | Optical Components
Session Chair: Stefan Andersson-Engels
Session Chair: Per-Olof Hedekvist
13:20
Nonlinear Molecular Microscopy
Annika Enejder, Chalmers University of Technology
13:20
Position Sensing Detectors and High Performance
Applications
Anders Lundgren, SiTek Electroopics AB
13:40
Optical Techniques for Single Cell Imaging
Anna-Karin Gustavsson, University of Gothenburg
13:40
Optical Components and Spectrum Analysers
(developed in Gothenburg)
Olle Rosenqvist, Thorlabs Sweden AB
14:00-15:00
Session B2 | Optical Metrology
Session Chair: Per-Olof Hedekvist
14:00
Evanescent Mid-IR Spectroscopy, Diamond Waveguides,
and Neuroscience - Work in Progress Towards Clinical
Studies
Fredrik Nikolajeff, University of Uppsala
14:20
Fiber Optical Raman Spectroscopy Combined with Tactile Resonance Sensor Technique for Prostate Cancer
Detection during Surgery – First Results from a Clinical
Study
Kerstin Ramser, Luleå University of Technology
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14:00
Optical Alignment
Peter Strömberg, Acoem AB
14:20
Laser Measurement Systems
Mats Sjöberg, Limab AB
Room: Runan
Room: Scaniasalen
TUESDAY, 11 NOVEMBER 2014
14:40
Photonics in Neurosurgery – Examples of Methods for
Surgical Guidance
Karin Wårdell, Linköping University
14:40
Possibilities of Optical 3D-Technology for Measurement
and Positioning in the Production Line
Gustav von Heijne, Stemmer Imaging AB
15:00-15:30
Coffee Break
Room: Volvofoajén
15:30-17:10
Session A2 | Optical Communication, Short Pulse
Sources and Photonic Materials
Session Chair: Peter Andrekson
15:30-17:10
Session B2 | Optical Metrology (continued)
15:30
Coherent Optical Communication
Sergei Popov, Royal Institute of Technology
15:30
Motion Capture Technology
Fredrik Müller, Qualisys AB
15:50
High Speed VCSELs and Optical Interconnects
Petter Westbergh, Chalmers University of Technology
15:50
Optronical Challenges for Future Generation of EyeTrackers
Peter Blixt, Tobii Technology AB
16:10
Development and Perspectives of High Repetition Rate
Attosecond Sources
Cord Arnold, Lund University
16:10
New laser power meter improves process control
Hans-Christian Becker, Gammadata Instrument AB
16:30
Silicon Photonics by III-V Growth on Silicon
Sebastian Lourdudoss, Royal Institute of Technology
16:30
Mid IR tunable lasers for gas sensing and environmental
monitoring
Jonas Hellström, Cobolt AB
16:50
Lithium Niobate: the Silicon of Photonics
Yen-Chieh Huang, Tsinghua University, Taiwan
16:50
Laser rangefinder technology within Saab AB
Stellan Wickström, Saab AB
17:30-19:00
Poster Session & Get Together
17.30-18-30
Årsmöte Swedish Optical Society (SOS)
19:00-22:00
Conference Dinner
Session Chair: Per-Olof Hedekvist
Room: Volvofoajén
Room: Catella - Övre Foayén
Room: Kårhuset
7
Room: Runan
Room: Scaniasalen
WEDNESDAY, 12 NOVEMBER 2014
09:00-10:40
Session A3 | Quantum and Nanophotonics
09:00-09:40
Session B3 | Laser machining
Session Chair: Mohamed Bourennane
Session Chair: Olle Rosenqvist
09:00
Nanowire Solar Cells and Light Emitters
Lars Samuelson, Lund University
09:00
Optical Challenges of High Power Laser Transmission
Magnus Pålsson, Optoskand AB
09:20
Artificial Optical Nonlinearities
Marcin Swillo, Royal Institute of Technology
09:20
High Tech Laser Welding in Swedish Industry
Ulf Sandström, Permanova Lasersystem AB
09:40-10:40
Session B4 | Survey & Surveillance
Session Chair: Magnus Olson
09:40
Applications of Slow Light
Stefan Kröll, Lund University
09:40
Optics- and Sensor-Limitations for Next Generation of
Surveillance Cameras
Gunnar Dahlgren, Axis Communication AB
10:00
Strong Light-Matter Interaction with Plasmonic Nanoparticles
Timur Shegai, Chalmers University of Technology
10:00
Gyro Stabilised Micro Gimbals for Geo-Location and
Geo-Positioning
Jan-Erik Strömberg, DST Control AB
10:20
Photoemission Electron Microscopy using Femtosecond
and Attosecond Light Sources
Anders Mikkelsen, Lund University
10:20
Airborne Laser Survey Systems
Andreas Axelsson, Airborne Hydrography AB
10:40-11:10
Coffee Break
11:10-11:50
Industry, Thesis Awards
Magnus Breidne, PhotonicSweden
12:00-13:00
Lunch & Poster Session
13:00-13:45
Keynote Talk
Graphene Photonics and Optoelectronics
Andrea Ferrari, University of Cambridge
8
Room: Volvofoajén
Room: Runan
Room: Volvofoajén
Room: Runan
Session Chair
Anders Larsson
Room: Runan
Room: Scaniasalen
WEDNESDAY, 12 NOVEMBER 2014
14:00-15:00
Session A4 | Photovoltaics, Lighting and Green Photonics
Session Chair: Fredrik Nikolajeff
14:00-14:40
Session B5| Safety & Lighting
14:00
Organic Light Emission and Photovoltaics
Ludvig Edman, Umeå University
14:00
Optical Products in Automotive Active Safety
Per Knutsson, Autoliv Sverige AB
14:20
Multilayered Inverse Opal Photonic Band Gap Structures
for Enhanced Photon Harvesting
Delphine Lebrun, Uppsala University
14:20
Customized Lighting
Jonas Stålhandske, ALUWAVE AB
Session Chair: Mikael Sjödahl
14:40-15:00
Session B6| Optical Communication
Session Chair: Lennart B.M. Svensson
14:40
Charge Carrier Dynamics of Nanostructured Solar Cell
Materials Studied by Time-Resolved THz Spectroscopy
Villy Sundström, Lund University
14:40
Pluggable Optics in Metro DWDM - from 1G WDM PON
SFPs to 100G digital coherent CFPs
Magnus Olson, Transmode AB
15:10-15:20
Closing Remarks & Farewell
Magnus Breidne, PhotonicSweden; Anders Larsson, Chalmers University of Technology
15:30
Lab & Company Visits at
Photonics Lab, Chalmers
Room: Runan
Departure of bus
|
Permanova AB / Optoskand AB
|
Thorlabs Sweden AB
(further information see next page)
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LAB & COMPANY VISITS
OPTION 1
Visiting Chalmers’s Laboratories on site
OPTION 2
Visiting all three companies by bus tours
Chalmers Photonics Laboratory
Optoskand AB
The Photonics Laboratory at Chalmers University of Technology conducts application oriented research in optoelectronics and fiber optics, as well as more fundamental
research on new photonic materials and nanophotonics.
Optical communication is a major area of research, with
efforts on system and device technologies for applications extending from long-haul transmission to short
reach interconnects. Efforts are also invested in the development of new photonic materials and device technologies for emission and detection at wavelengths spanning from the ultra-violet to the mid-infrared. The materials oriented research involves growth of nitrides, oxides, graphene, and bismuth-telluride.
Optoskand develops and manufactures a wide range of
beam delivery products for industrial high power laser
applications. The tour will provide a good overview of
Optoskand’s new modern facility at Aminogatan in Mölndal.
Chalmers Nanofabrication Laboratory
The Nanofabrication Laboratory is a world-class university cleanroom for research into and fabrication of micro
and nanotechnology. The laboratory is run by the Department of Microtechnology and Nanoscience at
Chalmers, but is an open user facility for external as
well as internal academic and industrial interests. The
Nanofabrication Laboratory offers a broad platform of
process tools for the development and testing of new
ideas in micro and nanotechnology.
Permanova Lasersystem AB
Permanova Lasersystem AB have about 20 people with
a focus to deliver laser materials processing equipment
based on the combination laser, robot and fiber. Our
target is to increase the productivity and product quality
in our customer’s production. Today we have delivered
more than 180 pcs. We will show our laser lab with two
robots and one 6kW fiber laser. We have hopefully one
station for laser welding and powder cladding in assembly that could be shown. We plan to show a process tool
with integrated seam tracking as well, and hopefully
some more of our standard products.
Thorlabs Sweden AB
Thorlabs Sweden AB would like to invite you to a guided
tour at their production and clean room facility in
Gothenburg. Here Thorlab’s beam expander range, collimators, scan lenses, objectives, Optical Spectrum Analyzers as well as the Fabry-Perot interferometers, are
being designed and produced.
Thorlabs is Patron Sponsor of the
International Year of Light
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POSTER PRESENTATIONS
Plasma-assisted molecular beam epitaxy of ZnO on
in-situ grown GaN/4H-SiC buffer layers
David Adolph, Chalmers University of Technology
Laser Induced Damage Thresholds of KTiOPO4 and
Rb:KTiOPO4
Riaan Stuart Coetzee, KTH Royal Institute of Technology
Optical arbitrary waveform characterization via
electro-optic dual-comb interferometry
Vicente Durán, Chalmers University of Technology
Thermal memory device and radiative bistability
effect
Sergey Dyakov, School of Information and Communication
Technology, KTH Royal Institute of Technology
Transmitter Mask Testing for Coherent Fiber Optical
Communication Systems
Henrik Eliasson, Chalmers University of Technology
Passively Q-switched, single frequency, 20 μm core
Yb-doped fiber amplifier
Magnus Engholm, Mid Sweden University
GaN-based Vertical-Cavity Surface-Emitting Lasers
Seyed Ehsan Hashemi, Chalmers University of Technology
Taking WDM into the Access networks – Challenges
and opportunities
Einar In de Betou, Transmode Systems AB
Study of PL from semipolar (2021) InxGa1-xN/GaN
QWs
Ruslan Ivanov, School of ICT KTH - Royal Institute of
Technology Stockholm
Contact poling of Rb:KTiOPO4 using a microstructured silicon electrode
Hoda Kianirad, KTH Royal Institute of Technology
Integration of Nonlinear Optical Systems Within the
Silicon Photonics Platform
Clemens Krückel, Chalmers University of Technology
Chemical Patterning by ion exchange of Rubidium
doped KTiOPO4 for electric field periodic poling
Charlotte Liljestrand, KTH - Royal Institute of Technology
Multicore Crosstalk Transmission Penalties
Tobias Eriksson, Chalmers University of Technology
Electro optical polymers
Gleb Lobov, School of ICT KTH - Royal Institute of
Technology Stockholm
Resonant nonlinear effects in silicon nitride
microresonators
Attila Fülöp, Chalmers University of Technology
Phase-Sensitive Amplification of Dual-Polarization
Modulated Signals
Abel Lorences Riesgo, Chalmers University of Technology
Year of Light 2015 - Laser Classroom Experiments –
from Kindergarten Kids to Nobel Prizes
Sheila Galt, Chalmers University of Technology
Energy Efficient Long-Haul Fiber Optical
Communication
Lars Lundberg, Chalmers University of Technology
Optimum Damping Level for High-Speed Large Signal
VCSEL Modulation
Emanuel Haglund, Chalmers University of Technology
Performance Observations for SEEPOS, a Novel Signal
Processing System for PSD Applications
Anders Lundgren, SiTek Electro Optics
High-Contrast Gratings for WDM VCSEL Arrays
Erik Haglund, Chalmers University of Technology
Diamond waveguides for sensing applications
Mikael Malmström, University of Uppsala
NV Centers in Diamond for Quantum Technologies
Alley Hameedi, Stockholm University
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POSTER PRESENTATIONS
FDTD simulations of four-wave mixing in periodic
nanohole arrays
Nisha Rani Agarwal, Chalmers University of Technology
Flat thin spectrally selective reflective lenses for photovoltaic applications
Sergiy Valyukh, University of Linköping
Experimental Measurement-Device-Independent
Entanglement Detection
Muhammad Sadiq, Stockholm University
Influence of Au NPs on the optical gain of the
Rhodamine 6G in PMMA
Elena Vasileva, KTH, ICT school
Second-Harmonic Generation from Single GaP
Nanopillars
Reza Sanatinia, KTH, ICT school
Sensitive optical biosensing by using Silicon
nanopillar arrays
Dennis Visser, KTH Royal Institute of Technology
High Resolution Time-Correlated Single-Photon Counting Range Profiling and Tomographic Imaging
Lars Sjöqvist, FOI, Swedish Defence Research Agency
New laser light sources improves in-toto imaging with
light sheet fluorescence microscopy
Dag von Gegerfelt, von Gegerfelt Photonics GmbH
Multi-resonator Structure Based on Continuous Thin
Metal Films for Transparent Conductors
Reyhaneh Soltanmoradi, KTH - Royal Institute of
Technology
Towards Optical Clocks and Coherent Frequency
Transfer in Sweden
Martin Zelan, SP Technical Research Institute of Sweden
Hybrid Plasmonic Devices for Optical Interconnects
and Sensing
Xu Sun, KTH - Royal Institute of Technology
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SPONSORS & PARTNERS
SPONSORS
SPONSOR OF THE PS AND SOS
STUDENT AWARD 2014
1ST PRIZE
2ND PRIZE
MEDIA PARTNERS
SUPPORTED BY
EXHIBITORS