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Publications (10 of 112) Show all publications
Jedrkiewicz, O., Gatti, A., Brambilla, E., Levenius, M., Tamosauskas, G. & Gallo, K. (2018). Golden Ratio Gain Enhancement in Coherently Coupled Parametric Processes. Scientific Reports, 8, Article ID 11616.
Open this publication in new window or tab >>Golden Ratio Gain Enhancement in Coherently Coupled Parametric Processes
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2018 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, article id 11616Article in journal (Refereed) Published
Abstract [en]

Nonlinear optical processes are an essential tool in modern optics, with a broad spectrum of applications, including signal processing, frequency conversion, spectroscopy and quantum optics. Ordinary parametric devices nevertheless still suffer from relatively low gains and wide spectral emission. Here we demonstrate a unique configuration for phase- matching multiple nonlinear processes in a monolithic 2D nonlinear photonic crystal, resulting in the coherent parametric emission of four signal and idler modes, featuring an exponential gain enhancement equal to the Golden Ratio. The results indicate a new route towards compact high- brightness and coherent sources for multi- photon generation, manipulation and entanglement, overcoming limitations of conventional parametric devices.

Place, publisher, year, edition, pages
Nature Publishing Group, 2018
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-233277 (URN)10.1038/s41598-018-30014-7 (DOI)000440621000033 ()30072813 (PubMedID)2-s2.0-85051069479 (Scopus ID)
Funder
Swedish Research Council, VR 622-2010-526 621-2014-5407
Note

QC 20180821

Available from: 2018-08-21 Created: 2018-08-21 Last updated: 2018-08-21Bibliographically approved
Al-Shammari, R. M., Al-Attar, N., Manzo, M., Gallo, K., Rodriguez, B. J. & Rice, J. H. (2018). Single-Molecule Nonresonant Wide-Field Surface-Enhanced Raman Scattering from Ferroelectrically Defined Au Nanoparticle Microarrays. ACS OMEGA, 3(3), 3165-3172
Open this publication in new window or tab >>Single-Molecule Nonresonant Wide-Field Surface-Enhanced Raman Scattering from Ferroelectrically Defined Au Nanoparticle Microarrays
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2018 (English)In: ACS OMEGA, ISSN 2470-1343, Vol. 3, no 3, p. 3165-3172Article in journal (Refereed) Published
Abstract [en]

Single-molecule detection by surface-enhanced Raman scattering (SERS) is a powerful spectroscopic technique that is of interest for the sensor development field. An important aspect of optimizing the materials used in SERS-based sensors is the ability to have a high density of "hot spots" that enhance the SERS sensitivity to the single-molecule level. Photodeposition of gold (Au) nanoparticles through electric-field-directed self-assembly on a periodically proton-exchanged lithium niobate (PPELN) substrate provides conditions to form well-ordered microscale features consisting of closely packed Au nanoparticles. The resulting Au nanoparticle microstructure arrays (microarrays) are plasmon-active and support nonresonant single-molecule SERS at ultralow concentrations (<10(-9)-10(-13) M) with excitation power densities <1 x 10(-3) W cm(-2) using wide-field imaging. The microarrays offer excellent SERS reproducibility, with an intensity variation of <7.5% across the substrate. As most biomarkers and molecules do not support resonance enhancement, this work demonstrates that PPELN is a suitable template for high-sensitivity, nonresonant sensing applications.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2018
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-225737 (URN)10.1021/acsomega.7b01285 (DOI)000427939400077 ()2-s2.0-85044217007 (Scopus ID)
Funder
Swedish Research Council, 622-2010-526; 621-2011-4040
Note

QC 20180410

Available from: 2018-04-10 Created: 2018-04-10 Last updated: 2018-04-10Bibliographically approved
Schollhammer, J., Baghban, M. A. & Gallo, K. (2017). Birefringence-free lithium niobate waveguides. In: Optics InfoBase Conference Papers: . Paper presented at The European Conference on Lasers and Electro-Optics, CLEO_Europe 2017, 25 June 2017 through 29 June 2017. OSA - The Optical Society
Open this publication in new window or tab >>Birefringence-free lithium niobate waveguides
2017 (English)In: Optics InfoBase Conference Papers, OSA - The Optical Society , 2017Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
OSA - The Optical Society, 2017
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-222926 (URN)2-s2.0-85039924595 (Scopus ID)9781557528209 (ISBN)
Conference
The European Conference on Lasers and Electro-Optics, CLEO_Europe 2017, 25 June 2017 through 29 June 2017
Note

QC 20180328

Available from: 2018-03-28 Created: 2018-03-28 Last updated: 2018-03-28Bibliographically approved
Schollhammer, J., Baghban, M. A. & Gallo, K. (2017). Birefringence-Free Lithium Niobate Waveguides. In: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC): . Paper presented at 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC). IEEE
Open this publication in new window or tab >>Birefringence-Free Lithium Niobate Waveguides
2017 (English)In: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC), IEEE , 2017Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2017
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-230871 (URN)000432564600930 ()
Conference
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
Note

QC 20180618

Available from: 2018-06-18 Created: 2018-06-18 Last updated: 2018-06-19Bibliographically approved
Kilinc, D., Blasiak, A., Baghban, M. A., Carville, N. C., Al-Adli, A., Al-Shammari, R. M., . . . Rodriguez, B. J. (2017). Charge and topography patterned lithium niobate provides physical cues to fluidically isolated cortical axons. Applied Physics Letters, 110(5), Article ID 053702.
Open this publication in new window or tab >>Charge and topography patterned lithium niobate provides physical cues to fluidically isolated cortical axons
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2017 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 110, no 5, article id 053702Article in journal (Refereed) Published
Abstract [en]

In vitro devices that combine chemotactic and physical cues are needed for understanding how cells integrate different stimuli. We explored the suitability of lithium niobate (LiNbO3), a transparent ferroelectric material that can be patterned with electrical charge domains and micro/ nanotopography, as a neural substrate. On flat LiNbO3 z-surfaces with periodically alternating charge domains, cortical axons are partially aligned with domain boundaries. On submicron-deep etched trenches, neurites are aligned with the edges of the topographical features. Finally, we bonded a bicompartmental microfluidic chip to LiNbO3 surfaces patterned by etching, to create isolated axon microenvironments with predefined topographical cues. LiNbO3 is shown to be an emerging neuron culture substrate with tunable electrical and topographical properties that can be integrated with microfluidic devices, suitable for studying axon growth and guidance mechanisms under combined topographical/chemical stimuli.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017
Keywords
Axons, Topography, Fluidic devices, Etching, Atomic force microscopy
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-203961 (URN)10.1063/1.4975304 (DOI)000394057600046 ()2-s2.0-85011317245 (Scopus ID)
Funder
Swedish Research Council, 622-2010-526Swedish Research Council, 621-2014-5407
Note

QC 20170406

Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-11-29Bibliographically approved
Al-Shammari, R. M., Alattar, N., Manzo, M., Gallo, K., Rodriguez, B. J. & Rice, J. H. (2017). Label-free cell membrane detection by Raman spectroscopy using biocompatible gold nanostructure microscale arrays on a ferroelectric template. In: Optics InfoBase Conference Papers: . Paper presented at Frontiers in Optics, FiO 2017, 18 September 2017 through 21 September 2017. OSA - The Optical Society
Open this publication in new window or tab >>Label-free cell membrane detection by Raman spectroscopy using biocompatible gold nanostructure microscale arrays on a ferroelectric template
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2017 (English)In: Optics InfoBase Conference Papers, OSA - The Optical Society , 2017Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
OSA - The Optical Society, 2017
Keywords
Biocompatibility, Cytology, Gold, Gold Nanoparticles, Gold nanostructures, Label free, Membrane detections, Osteoblast-like cells, Photo-deposition, Ferroelectricity
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-222939 (URN)10.1364/FIO.2017.JTu2A.89 (DOI)2-s2.0-85035140435 (Scopus ID)9781557528209 (ISBN)
Conference
Frontiers in Optics, FiO 2017, 18 September 2017 through 21 September 2017
Note

QC 20180327

Available from: 2018-03-27 Created: 2018-03-27 Last updated: 2018-03-27Bibliographically approved
Damm, S., Carville, N. C., Manzo, M., Gallo, K., Rodriguez, B. J. & Rice, J. H. (2017). Protein assemblies on ferroelectrically patterned microarrays of Ag nanoparticles. Paper presented at Joint 25th IEEE International Symposium on the Applications of Ferroelectrics (ISAF) / 13th European Conference on Application of Polar Dielectrics (ECAPD) / Piezoelectric Force Microscopy Workshop (PFM), AUG 21-25, 2016, Tech Univ Darmstadt, Darmstadt, GERMANY. Ferroelectrics (Print), 515(1), 141-148
Open this publication in new window or tab >>Protein assemblies on ferroelectrically patterned microarrays of Ag nanoparticles
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2017 (English)In: Ferroelectrics (Print), ISSN 0015-0193, E-ISSN 1563-5112, Vol. 515, no 1, p. 141-148Article in journal (Refereed) Published
Abstract [en]

Nano-bio interfaces play a significant role in assay device design and performance, here we study the use of a combined plasmonic and ferroelectric active substrate design for protein assemblies on a plasmon active array. We demonstrate that biotinylation and protein assemblies can bemade onmetal nanoparticles patterned on ferroelectric substrates. These results inturndemonstratethat ferroelectric substrates combined with active plasmonics is potentially applicable as substrates for biological assays.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD, 2017
Keywords
LiNbO3, SERS, proteins, bacteriochlorophyll, Ag, proton exchange, ferroelectric, silver nanoparticles
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-217772 (URN)10.1080/00150193.2017.1367228 (DOI)000414148100018 ()2-s2.0-85030760787 (Scopus ID)
Conference
Joint 25th IEEE International Symposium on the Applications of Ferroelectrics (ISAF) / 13th European Conference on Application of Polar Dielectrics (ECAPD) / Piezoelectric Force Microscopy Workshop (PFM), AUG 21-25, 2016, Tech Univ Darmstadt, Darmstadt, GERMANY
Note

QC 20171121

Available from: 2017-11-21 Created: 2017-11-21 Last updated: 2017-11-21Bibliographically approved
Jedrkiewicz, O., Gatti, A., Brambilla, E., Tamosˇauskas, G., Trapani, P. D. & Gallo, K. (2017). Superresonant parametric generation in nonlinear photonic crystals. In: Optics InfoBase Conference Papers: . Paper presented at The European Conference on Lasers and Electro-Optics, CLEO_Europe 2017, 25 June 2017 through 29 June 2017. OSA - The Optical Society
Open this publication in new window or tab >>Superresonant parametric generation in nonlinear photonic crystals
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2017 (English)In: Optics InfoBase Conference Papers, OSA - The Optical Society , 2017Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
OSA - The Optical Society, 2017
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-222913 (URN)2-s2.0-85039908108 (Scopus ID)9781557528209 (ISBN)
Conference
The European Conference on Lasers and Electro-Optics, CLEO_Europe 2017, 25 June 2017 through 29 June 2017
Note

Conference code: 139018; Export Date: 13 February 2018; Conference Paper

QC 20180323

Available from: 2018-03-23 Created: 2018-03-23 Last updated: 2018-03-23Bibliographically approved
Jedrkiewicz, O., Gatti, A., Brambilla, E., Tamosauskas, G., Di Trapani, P. & Gallo, K. (2017). Superresonant Parametric Generation in Nonlinear Photonic Crystals. In: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC): . Paper presented at 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC). IEEE
Open this publication in new window or tab >>Superresonant Parametric Generation in Nonlinear Photonic Crystals
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2017 (English)In: 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC), IEEE , 2017Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2017
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-230868 (URN)000432564600233 ()
Conference
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
Note

QC 20180618

Available from: 2018-06-18 Created: 2018-06-18 Last updated: 2018-06-25Bibliographically approved
Al-Shammari, R. M., Manzo, M., Gallo, K., Rice, J. H. & Rodriguez, B. J. (2017). Tunable Wettability of Ferroelectric Lithium Niobate Surfaces: The Role of Engineered Microstructure and Tailored Metallic Nanostructures. The Journal of Physical Chemistry C, 121(12), 6643-6649
Open this publication in new window or tab >>Tunable Wettability of Ferroelectric Lithium Niobate Surfaces: The Role of Engineered Microstructure and Tailored Metallic Nanostructures
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2017 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 121, no 12, p. 6643-6649Article in journal (Refereed) Published
Abstract [en]

An important aspect of optimizing micro- and optofluidic devices for lab on -a-chip systems is the ability to engineer materials properties including surface structure and charge to control wettability. Biocompatible ferroelectric lithium niobate (LN), which is well-known for acoustic and nonlinear optical applications, has recently found potential micro- and optofluidic applications. However, the tunable wettability of such substrates has yet to be explored in detail. Here, we show that the contact angle of LN substrates can be reproducibly tailored between similar to 7 degrees and similar to 421 degrees by controlling the surface topography and chemistry at the nano- and micrometer scale via ferroelectric domain and polarization engineering and polarization-directed photoassisted deposition of metallic nanostructures.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2017
National Category
Nano Technology
Identifiers
urn:nbn:se:kth:diva-206289 (URN)10.1021/acs.jpcc.6b12336 (DOI)000398247500026 ()
Note

QC 20170509

Available from: 2017-05-09 Created: 2017-05-09 Last updated: 2017-05-09Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7185-0457

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