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Publikationer (10 of 66) Visa alla publikationer
Ottonello Briano, F., Errando-Herranz, C., Rödjegård, H., Martin, H., Sohlström, H. & Gylfason, K. (2019). Carbon Dioxide Sensing with Low-confinement High-sensitivity Mid-IR Silicon Waveguides. In: 2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO): . Paper presented at Conference on Lasers and Electro-Optics (CLEO), MAY 05-10, 2019, San Jose, CA. Institute of Electrical and Electronics Engineers (IEEE), Article ID 8750210.
Öppna denna publikation i ny flik eller fönster >>Carbon Dioxide Sensing with Low-confinement High-sensitivity Mid-IR Silicon Waveguides
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2019 (Engelska)Ingår i: 2019 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), Institute of Electrical and Electronics Engineers (IEEE), 2019, artikel-id 8750210Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We present a low-confinement Si waveguide for 4.26 μm wavelength and apply it to sense CO2 concentrations down to 0.1 %. We demonstrate the highest reported waveguide sensitivity to CO2: 44 % of the free-space sensitivity.

Ort, förlag, år, upplaga, sidor
Institute of Electrical and Electronics Engineers (IEEE), 2019
Serie
Conference on Lasers and Electro-Optics, ISSN 2160-9020
Nyckelord
mid-infrared, mid-IR, photonics, silicon photonics, gas sensing, optical sensing, optical gas sensing, absorption, carbon dioxide, CO2, CO2 sensing, trace gas, waveguide, photonic waveguide, silicon, microfabrication, microsystems, microtechnology, nanotechnology
Nationell ämneskategori
Nanoteknik Annan elektroteknik och elektronik Analytisk kemi Atom- och molekylfysik och optik
Identifikatorer
urn:nbn:se:kth:diva-259471 (URN)10.23919/CLEO.2019.8750210 (DOI)000482226302159 ()2-s2.0-85069147415 (Scopus ID)978-1-943580-57-6 (ISBN)
Konferens
Conference on Lasers and Electro-Optics (CLEO), MAY 05-10, 2019, San Jose, CA
Anmärkning

QC 20190917

Tillgänglig från: 2019-09-17 Skapad: 2019-09-17 Senast uppdaterad: 2019-11-11Bibliografiskt granskad
Ottonello Briano, F., Sohlström, H., Forsberg, F., Renoux, P., Ingvarsson, S., Stemme, G. & Gylfason, K. B. (2016). A sub-μs thermal time constant electrically driven Pt nanoheater: thermo-dynamic design and frequency characterization. Applied Physics Letters, 108(19), Article ID 193106.
Öppna denna publikation i ny flik eller fönster >>A sub-μs thermal time constant electrically driven Pt nanoheater: thermo-dynamic design and frequency characterization
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2016 (Engelska)Ingår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 108, nr 19, artikel-id 193106Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Metal nanowires can emit coherent polarized thermal radiation, work as uncooled bolometers, and provide localized heating. In this paper, we engineer the temperature dynamics of electrically driven Pt nanoheaters on a silicon-on-insulator substrate. We present three designs and we electrically characterize and model their thermal impedance in the frequency range from 3 Hz to 3 MHz. Finally, we show a temperature modulation of 300 K while consuming less than 5 mW of power, up to a frequency of 1.3 MHz. This result can lead to significant advancements in thermography and absorption spectroscopy.

Ort, förlag, år, upplaga, sidor
American Institute of Physics (AIP), 2016
Nyckelord
nanowire, thermal source, 3 omega method, high frequency
Nationell ämneskategori
Nanoteknik
Forskningsämne
Elektro- och systemteknik; Teknisk materialvetenskap; Fysik
Identifikatorer
urn:nbn:se:kth:diva-186289 (URN)10.1063/1.4948979 (DOI)000377023500046 ()2-s2.0-84969524604 (Scopus ID)
Forskningsfinansiär
VINNOVA, 2012-01233VINNOVA, 2014-05246Stockholms läns landsting, 20140751Stockholms läns landsting, 20150910EU, FP7, Sjunde ramprogrammet, 267528
Anmärkning

QC 20160523

Tillgänglig från: 2016-05-09 Skapad: 2016-05-09 Senast uppdaterad: 2019-10-03Bibliografiskt granskad
Aparicio, F. J., Alcaire, M., Gonzalez-Elipe, A. R., Barranco, A., Holgado, M., Casquel, R., . . . Niklaus, F. (2016). Dye-based photonic sensing systems. Sensors and actuators. B, Chemical, 228, 649-657
Öppna denna publikation i ny flik eller fönster >>Dye-based photonic sensing systems
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2016 (Engelska)Ingår i: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 228, s. 649-657Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We report on dye-based photonic sensing systems which are fabricated and packaged at wafer scale. For the first time luminescent organic nanocomposite thin-films deposited by plasma technology are integrated in photonic sensing systems as active sensing elements. The realized dye-based photonic sensors include an environmental NO2 sensor and a sunlight ultraviolet light (UV) A+B sensor. The luminescent signal from the nanocomposite thin-films responds to changes in the environment and is selectively filtered by a photonic structure consisting of a Fabry-Perot cavity. The sensors are fabricated and packaged at wafer-scale, which makes the technology viable for volume manufacturing. Prototype photonic sensor systems have been tested in real-world scenarios. (C) 2016 Elsevier B.V. All rights reserved.

Ort, förlag, år, upplaga, sidor
Elsevier, 2016
Nyckelord
Photonic sensor, Dye thin films, Gas sensor, UV sensor, Room-temperature Wafer level packaging
Nationell ämneskategori
Materialteknik
Identifikatorer
urn:nbn:se:kth:diva-184945 (URN)10.1016/j.snb.2016.01.092 (DOI)000371027900081 ()2-s2.0-84956976107 (Scopus ID)
Anmärkning

QC 20160410

Tillgänglig från: 2016-04-10 Skapad: 2016-04-07 Senast uppdaterad: 2017-11-30Bibliografiskt granskad
Ottonello Briano, F., Renoux, P., Forsberg, F., Sohlström, H., Ingvarsson, S., Stemme, G. & Gylfason, K. B. (2014). High-frequency sub-wavelength IR thermal source. Paper presented at Silicon Photonics and Photonic Integrated Circuits IV; Brussels; Belgium; 14 April 2014 through 17 April 2014. Proceedings of SPIE, the International Society for Optical Engineering, 9133, 91331D-1-91331D-6
Öppna denna publikation i ny flik eller fönster >>High-frequency sub-wavelength IR thermal source
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2014 (Engelska)Ingår i: Proceedings of SPIE, the International Society for Optical Engineering, ISSN 0277-786X, E-ISSN 1996-756X, Vol. 9133, s. 91331D-1-91331D-6Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We present a method to characterize the temperature dynamics of miniaturized thermal IR sources. The method circumvents the limitations of current IR photodetectors, by relying only on an electrical measurement rather than on optical detection. Thus, it enables the characterization of the light emission of IR sources over their full operation frequency range. Moreover, we develop a model of thermal IR sources allowing simulations of their thermal and electrical behavior. By combining measurements and modeling, we achieve a comprehensive characterization of a Pt nanowire IR source: the reference resistance R-0 = 17.7 Omega, the TCR alpha = 2.0 x 10(-3) K-1, the thermal mass C = 2.7 x 10(-14) J/K, and the thermal conductance G = 1.3 x 10(-6) W/K. The thermal time constant could not be measured, because of the frequency limitation of our setup. However, the operation of the source has been tested and proved to function up to 1 MHz, indicating that the thermal time constant of the source is smaller than 1 mu s.

Nyckelord
IR source, platinum nanowire, frequency response
Nationell ämneskategori
Nanoteknik
Identifikatorer
urn:nbn:se:kth:diva-144851 (URN)10.1117/12.2052457 (DOI)000338590400031 ()2-s2.0-84903166156 (Scopus ID)
Konferens
Silicon Photonics and Photonic Integrated Circuits IV; Brussels; Belgium; 14 April 2014 through 17 April 2014
Projekt
GASENS
Forskningsfinansiär
Vinnova, 2012-01233
Anmärkning

QC 20140813

Tillgänglig från: 2014-05-26 Skapad: 2014-04-29 Senast uppdaterad: 2017-12-05Bibliografiskt granskad
Lapisa, M., Antelius, M., Tocchio, A., Sohlström, H., Stemme, G. & Niklaus, F. (2013). Wafer-Level capping and sealing of heat sensitive substances and liquids with gold gaskets. Sensors and Actuators A-Physical, 201, 154-163
Öppna denna publikation i ny flik eller fönster >>Wafer-Level capping and sealing of heat sensitive substances and liquids with gold gaskets
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2013 (Engelska)Ingår i: Sensors and Actuators A-Physical, ISSN 0924-4247, E-ISSN 1873-3069, Vol. 201, s. 154-163Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This paper reports on a novel wafer-level packaging method employing gold gaskets and an epoxy underfill. The packaging is done at room-temperature and atmospheric pressure. The mild packaging conditions allow the encapsulation of sensitive devices. The method is demonstrated for two applications; the wafer-level encapsulation of a liquid and the wafer-level packaging of a photonic gas sensor containing heat sensitive dye-films.

Ort, förlag, år, upplaga, sidor
Elsevier, 2013
Nyckelord
Wafer-level packaging, Liquid sealing, Room-temperature, Underfill application, Gasket
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
urn:nbn:se:kth:diva-119838 (URN)10.1016/j.sna.2013.07.007 (DOI)000325836400020 ()2-s2.0-84881511190 (Scopus ID)
Projekt
Phodye
Forskningsfinansiär
EU, Europeiska forskningsrådet
Anmärkning

QC 20131129

Tillgänglig från: 2013-03-24 Skapad: 2013-03-24 Senast uppdaterad: 2017-12-06Bibliografiskt granskad
Dubois, V. J., Antelius, M., Sohlström, H. & Gylfason, K. B. (2012). A single-lithography SOI rib waveguide sensing circuit with apodized low back-reflection surface grating fiber coupling. In: Laurent Vivien, Seppo K. Honkanen, Lorenzo Pavesi, Stefano Pelli (Ed.), SILICON PHOTONICS AND PHOTONIC INTEGRATED CIRCUITS III: . Paper presented at SPIE Photonics Europe, Brussels, April 16-19, 2012 (pp. 84311-84311). SPIE - International Society for Optical Engineering, 8431
Öppna denna publikation i ny flik eller fönster >>A single-lithography SOI rib waveguide sensing circuit with apodized low back-reflection surface grating fiber coupling
2012 (Engelska)Ingår i: SILICON PHOTONICS AND PHOTONIC INTEGRATED CIRCUITS III / [ed] Laurent Vivien, Seppo K. Honkanen, Lorenzo Pavesi, Stefano Pelli, SPIE - International Society for Optical Engineering, 2012, Vol. 8431, s. 84311-84311Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We present a single-lithography Mach-Zehnder interferometer sensor circuit, with integrated low back-reflection input and output grating couplers. The low back-reflection is accomplished by a duty cycle apodization optimized for coupling light between single-mode silica fibers and the nanometric silicon-on-insulator (SOI) rib-waveguides. We discuss the design, fabrication, and characterization of the circuit. The apodization profile of the gratings is algorithmically generated using eigenmode expansion based simulations and the integrated waveguides, splitters, and combiners are designed using finite element simulations. The maximum simulated coupling efficiencies of the gratings are 70% and the multimode interference splitters and combiners have a footprint of only 19.2ᅵ4.5 ᅵm2. The devices are fabricated on an SOI wafer with a 220 nmdevice layer and 2 ᅵm buried oxide, by a single electron beam lithography and plasma etching. We characterize the devices in the wavelength range from 1460-1580 nm and show a grating pass-band ripple of only 0.06 dB and grating coupling efficiency of 40% at 1530 nm. The integrated Mach-Zehnder interferometer has an extinction ratio of -18 dB at 1530 nm and between -13 and -19 dB over the whole 1460-1580 nm range.

Ort, förlag, år, upplaga, sidor
SPIE - International Society for Optical Engineering, 2012
Serie
Proceedings of SPIE, ISSN 0277-786X ; 8431
Nyckelord
Integrated Mach-Zehnder interferometer, SOI rib waveguide, single-mode criteria, apodized surfacegrating coupler, multimode interference coupler
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
urn:nbn:se:kth:diva-95291 (URN)10.1117/12.921815 (DOI)000305452700040 ()2-s2.0-84861984786 (Scopus ID)978-0-8194-9123-7 (ISBN)
Konferens
SPIE Photonics Europe, Brussels, April 16-19, 2012
Projekt
Cell-Ring
Forskningsfinansiär
Vetenskapsrådet, B0460801
Anmärkning

QC 20120612

Tillgänglig från: 2012-06-12 Skapad: 2012-05-21 Senast uppdaterad: 2013-09-16Bibliografiskt granskad
Antelius, M., Gylfason, K. B. & Sohlström, H. (2012). An apodized surface grating coupler enabling single lithography silicon photonic nanowire sensors. In: : . Paper presented at Micronano System Workshop, MSW 2012, Linköping, May 9-10.
Öppna denna publikation i ny flik eller fönster >>An apodized surface grating coupler enabling single lithography silicon photonic nanowire sensors
2012 (Engelska)Konferensbidrag, Poster (med eller utan abstract) (Övrigt vetenskapligt)
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
urn:nbn:se:kth:diva-117910 (URN)
Konferens
Micronano System Workshop, MSW 2012, Linköping, May 9-10
Anmärkning

QC 20130521

Tillgänglig från: 2013-02-07 Skapad: 2013-02-07 Senast uppdaterad: 2013-05-21Bibliografiskt granskad
Bengtsson, M., Lilliesköld, J., Norgren, M., Skog, I. & Sohlström, H. (2012). Developing and Implementing a Program Interfacing Project Course in Electrical Engineering. In: : . Paper presented at 8th International CDIO Conference,Brisbane, Australia July 1-4, 2012.
Öppna denna publikation i ny flik eller fönster >>Developing and Implementing a Program Interfacing Project Course in Electrical Engineering
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2012 (Engelska)Konferensbidrag, Enbart muntlig presentation (Refereegranskat)
Abstract [en]

In this paper, we describe the ideas behind a second-year Design-Build course in Electrical Engineering. Electrical Engineering is a theoretical subject, and in such it is difficult to maintain the theoretical level in project courses introduced too early in the program, especially when core subjects like electromagnetic field theory are involved. This issue is addressed and we also describe our approach for the assessment of the students. We also discuss the different goals that were set up prior to the course from a program perspective; how we reasoned when designing the course, the assessment structure, and the output once the course was implemented

Nyckelord
Project course, Design-Build, Electrical Engineering
Nationell ämneskategori
Teknik och teknologier Elektroteknik och elektronik
Identifikatorer
urn:nbn:se:kth:diva-164513 (URN)
Konferens
8th International CDIO Conference,Brisbane, Australia July 1-4, 2012
Anmärkning

QC 20150417

Tillgänglig från: 2015-04-17 Skapad: 2015-04-17 Senast uppdaterad: 2015-04-17Bibliografiskt granskad
Gylfason, K. B., Mola Romero, A. & Sohlström, H. (2012). Reducing the temperature sensitivity of SOI waveguide-based biosensors. In: Vivien, L; Honkanen, SK; Pavesi, L; Pelli, S (Ed.), Silicon Photonics and Photonic Integrated Circuits III: . Paper presented at SPIE Photonics Europe, Brussels, April 16-19, 2012 (pp. 84310-84310). SPIE - International Society for Optical Engineering, 8431
Öppna denna publikation i ny flik eller fönster >>Reducing the temperature sensitivity of SOI waveguide-based biosensors
2012 (Engelska)Ingår i: Silicon Photonics and Photonic Integrated Circuits III / [ed] Vivien, L; Honkanen, SK; Pavesi, L; Pelli, S, SPIE - International Society for Optical Engineering, 2012, Vol. 8431, s. 84310-84310Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Label-free photonic biosensors fabricated on silicon-on-insulator (SOI) can provide compact size, high evanescent field strength at the silicon waveguide surface, and volume fabrication potential. However, due to the large thermo optic coefficient of water-based biosamples, the sensors are temperature-sensitive. Consequently, active temperature control is usually used. However, for low cost applications, active temperature control is often not feasible. Here, we use the opposite polarity of the thermo-optic coefficients of silicon and water to demonstrate a photonic slot waveguide with a distribution of power between sample and silicon that aims to give athermal operation in water. Based on simulations, we made three waveguide designs close to the athermal point, and asymmetric integrated Mach- Zehnder interferometers for their characterization. The devices were fabricated on SOI with a 220 nm device layer and 2 ï¿œm buried oxide, by electron beam lithography of hydrogen silsesquioxane (HSQ) resist, and etching in a Cl2/HBr/O2/He plasma. With Cargile 50350 fused silica matching oil as top cladding, the group index of the three guides varies from 1.9 to 2.8 at 1550 nm. The temperature sensitivity of the devices varied from -70 to -160 pm/K under the same conditions. A temperature sensitivity of -2 pm/K is projected with water as top cladding.

Ort, förlag, år, upplaga, sidor
SPIE - International Society for Optical Engineering, 2012
Serie
Proceedings of SPIE, ISSN 0277-786X ; 8431
Nyckelord
Slot waveguide, biosensor, athermal, temperature sensitivity
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
urn:nbn:se:kth:diva-95292 (URN)10.1117/12.922263 (DOI)000305452700008 ()2-s2.0-84861987338 (Scopus ID)978-0-8194-9123-7 (ISBN)
Konferens
SPIE Photonics Europe, Brussels, April 16-19, 2012
Forskningsfinansiär
Vetenskapsrådet, B0460801
Anmärkning

QC 20120613

Tillgänglig från: 2012-06-13 Skapad: 2012-05-21 Senast uppdaterad: 2013-09-16Bibliografiskt granskad
Antelius, M., Gylfason, K. B. & Sohlström, H. (2011). An apodized SOI waveguide-to-fiber surface grating coupler for single lithography silicon photonics. Optics Express, 19(4), 3592-3598
Öppna denna publikation i ny flik eller fönster >>An apodized SOI waveguide-to-fiber surface grating coupler for single lithography silicon photonics
2011 (Engelska)Ingår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 19, nr 4, s. 3592-3598Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We present the design, fabrication, and characterization of a grating for coupling between a single mode silica fiber and the TE mode in a silicon photonic waveguide on a silicon on insulator (SOI) substrate. The grating is etched completely through the silicon device layer, thus permitting the fabrication of through-etched surface coupled silicon nanophotonic circuits in a single lithography step. Furthermore, the grating is apodized to match the diffracted wave to the mode profile of the fiber. We experimentally demonstrate a coupling efficiency of 35% with a 1 dB bandwidth of 47 nm at 1536 nm on a standard SOI substrate. Furthermore, we show by simulation that with an optimized buried oxide thickness, a coupling efficiency of 72% and a 1 dB bandwidth of 38 nm at 1550 nm is achievable. This is, to our knowledge, the highest simulated coupling efficiency for single-etch TE-mode grating couplers. In particular, simulations show that apodizing a conventional periodic through-etched grating decreases the back-reflection into the waveguide from 21% to 0.1%.

Nyckelord
1550 nm, Apodizing, Buried oxide thickness, Coupling efficiency, Diffracted waves, Etched gratings, Etched surface, Fiber surface, Grating couplers, Mode profiles, Nanophotonic circuits, Silica fibers, Silicon devices, Silicon photonics, Silicon-on-insulator substrates, Single mode, SOI substrates, SOI waveguides, TE mode, Coupled circuits, Lithography, Nanophotonics, Photonic devices, Silica
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
urn:nbn:se:kth:diva-32605 (URN)10.1364/OE.19.003592 (DOI)000288860000078 ()2-s2.0-79951642749 (Scopus ID)
Anmärkning
QC 20110419Tillgänglig från: 2011-04-19 Skapad: 2011-04-18 Senast uppdaterad: 2017-12-11Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-2650-0121

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