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Publications (10 of 63) Show all publications
Baghban, M. A., Swillo, M. & Gallo, K. (2019). Second-Harmonic generation engineering in lithium niobate nanopillars. In: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015: . Paper presented at 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015, 21 June 2015 through 25 June 2015. Optical Society of America (OSA)
Open this publication in new window or tab >>Second-Harmonic generation engineering in lithium niobate nanopillars
2019 (English)In: Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015, Optical Society of America (OSA) , 2019Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Optical Society of America (OSA), 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-252105 (URN)2-s2.0-85063843875 (Scopus ID)
Conference
2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015, 21 June 2015 through 25 June 2015
Note

QC 20190802

Available from: 2019-08-02 Created: 2019-08-02 Last updated: 2019-08-02Bibliographically approved
De Luca, E., Visser, D., Anand, S. & Swillo, M. (2018). Gallium indium phosphide nanostructures with suppressed photoluminescence for applications in nonlinear optics. In: Optics InfoBase Conference Papers: . Paper presented at Frontiers in Optics, FIO 2018, 16 September 2018 through 20 September 2018. OSA - The Optical Society
Open this publication in new window or tab >>Gallium indium phosphide nanostructures with suppressed photoluminescence for applications in nonlinear optics
2018 (English)In: Optics InfoBase Conference Papers, OSA - The Optical Society , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Nanostructured GaInP shows remarkable second-order nonlinear properties. By measuring the second harmonic generation before and after stimulating intrinsic photobleaching, we observed suppressed photoluminescence and unchanged nonlinear properties, making it suitable for low-noise applications. 

Place, publisher, year, edition, pages
OSA - The Optical Society, 2018
Keywords
Gallium alloys, III-V semiconductors, Indium alloys, Nonlinear optics, Photobleaching, Photoluminescence, Semiconducting indium phosphide, Semiconductor alloys, Gallium indium phosphide, Low-noise applications, Nano-structured, Nonlinear properties, Second orders, Indium phosphide
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-247436 (URN)10.1364/FIO.2018.JTu3A.83 (DOI)2-s2.0-85059406720 (Scopus ID)9781943580460 (ISBN)
Conference
Frontiers in Optics, FIO 2018, 16 September 2018 through 20 September 2018
Note

QC 20190403

Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-05-20Bibliographically approved
De Luca, E., Sanatinia, R., Mensi, M., Anand, S. & Swillo, M. (2017). Modal phase matching in nanostructured zincblende semiconductors for second-harmonic generation. In: Optics InfoBase Conference Papers: . Paper presented at CLEO: Applications and Technology, CLEO_AT 2017, 14 May 2017 through 19 May 2017. OSA - The Optical Society
Open this publication in new window or tab >>Modal phase matching in nanostructured zincblende semiconductors for second-harmonic generation
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2017 (English)In: Optics InfoBase Conference Papers, OSA - The Optical Society , 2017Conference paper, Published paper (Refereed)
Abstract [en]

Gallium phosphide nanowaveguide arrays, designed to fulfill the phase matching conditions and field-overlap, are characterized by second-harmonic generation. The bandwidth of 30nm with maximum conversion efficiency of 10-3 is measured for 150fs optical pulses.

Place, publisher, year, edition, pages
OSA - The Optical Society, 2017
Keywords
Gallium phosphide, Harmonic generation, Nonlinear optics, Zinc sulfide, Modal phase matching, Nano-structured, Phase matching conditions, Zincblende semiconductors, Phase matching
National Category
Nano Technology
Identifiers
urn:nbn:se:kth:diva-216568 (URN)10.1364/CLEO_AT.2017.JTu5A.60 (DOI)000427296201312 ()2-s2.0-85020426863 (Scopus ID)9781943580279 (ISBN)
Conference
CLEO: Applications and Technology, CLEO_AT 2017, 14 May 2017 through 19 May 2017
Note

QC 20171108

Available from: 2017-11-08 Created: 2017-11-08 Last updated: 2018-05-30Bibliographically approved
Jöns, K. D., Stensson, K., Reindl, M., Swillo, M., Huo, Y., Zwiller, V., . . . Björk, G. (2017). Two-photon interference from two blinking quantum emitters. Physical Review B, 96(7), Article ID 075430.
Open this publication in new window or tab >>Two-photon interference from two blinking quantum emitters
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2017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 96, no 7, article id 075430Article in journal (Refereed) Published
Abstract [en]

We investigate the effect of blinking on the two-photon interference measurement from two independent quantum emitters. We find that blinking significantly alters the statistics in the Hong-Ou-Mandel second-order intensity correlation function g((2))(tau) and the outcome of two-photon interference measurements performed with independent quantum emitters. We theoretically demonstrate that the presence of blinking can be experimentally recognized by a deviation from the g(D)((2))(0) = 0.5 value when distinguishable photons from two emitters impinge on a beam splitter. Our findings explain the significant differences between linear losses and blinking for correlation measurements between independent sources and are experimentally verified using a parametric down-conversion photon-pair source. We show that blinking imposes a mandatory cross-check measurement to correctly estimate the degree of indistinguishability of photons emitted by independent quantum emitters.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC, 2017
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-214329 (URN)10.1103/PhysRevB.96.075430 (DOI)000407993900008 ()2-s2.0-85028991471 (Scopus ID)
Note

QC 20170914

Available from: 2017-09-14 Created: 2017-09-14 Last updated: 2018-09-19Bibliographically approved
De Luca, E., Sanatinia, R., Srinivasan, A. & Swillo, M. (2016). Focused ion beam milling of gallium phosphide nanostructures for photonic applications. Optical Materials Express, 6(2), 587-596
Open this publication in new window or tab >>Focused ion beam milling of gallium phosphide nanostructures for photonic applications
2016 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 6, no 2, p. 587-596Article in journal (Refereed) Published
Abstract [en]

We report on the fabrication of gallium phosphide (GaP) nanowaveguides of controlled dimensions, as small as 0.03 μm and aspect ratio in excess of 20, using focused ion beam (FIB) milling. A known limitation of this fabrication process for photonic applications is the formation of gallium droplets on the surface. We demonstrate a post-fabrication step using a pulsed laser to locally oxidize the excess surface gallium on the FIB milled nanostructures. The process significantly reduces the waveguide losses. The surface optical quality of the fabricated GaP nanowaveguides has been evaluated by second-harmonic generation experiments. Surface and bulk contributions to second-order optical nonlinearities have been identified by polarization measurements. The presented method can potentially be applied to other III-V nanostructures to reduce optical losses.

Place, publisher, year, edition, pages
Optical Society of America, 2016
National Category
Nano Technology
Identifiers
urn:nbn:se:kth:diva-182213 (URN)10.1364/OME.6.000587 (DOI)000372039500032 ()2-s2.0-84957555940 (Scopus ID)
Note

QC 20160322

Available from: 2016-02-18 Created: 2016-02-18 Last updated: 2017-11-30Bibliographically approved
Sanatinia, R., Anand, S. & Swillo, M. (2015). Experimental quantification of surface optical nonlinearity in GaP nanopillar waveguides. Optics Express, 23(2), 756-764
Open this publication in new window or tab >>Experimental quantification of surface optical nonlinearity in GaP nanopillar waveguides
2015 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 23, no 2, p. 756-764Article in journal (Refereed) Published
Abstract [en]

We report on surface second-order optical nonlinearity in single GaP nanopillars (nanowaveguides). The relative contribution of optical nonlinearity from the surface and the bulk is resolved by mode confinement analysis and polarization measurements. By investigating the thickness of nonlinear region at the surface of nanopillars, we estimated the nonlinear coefficient to be similar to 15 times higher at the surface with respect to the bulk. The presented results are interesting both from the fundamental aspects of light-matter interaction and for future nonlinear nanophotonic devices with smaller footprint.

Keywords
Gallium alloys, Nanostructures, Confinement analysis, Light-matter interactions, Nanophotonic devices, Nonlinear coefficient, Optical nonlinearity, Polarization measurements, Relative contribution, Second order optical nonlinearity
National Category
Nano Technology Atom and Molecular Physics and Optics
Research subject
Physics; Materials Science and Engineering
Identifiers
urn:nbn:se:kth:diva-155198 (URN)10.1364/OE.23.000756 (DOI)000349166100016 ()2-s2.0-84921719961 (Scopus ID)
Funder
Swedish Research Council, 349-2007-8664Swedish Research Council, 621-2013-5811EU, FP7, Seventh Framework Programme, 248855
Note

QC 20150312. Updated from manuscript to article in journal.

Available from: 2014-11-03 Created: 2014-11-03 Last updated: 2017-12-05Bibliographically approved
Dev Choudhury, B., Sahoo, P. K., Sanatinia, R., Andler, G., Anand, S. & Swillo, M. (2015). Surface second harmonic generation from silicon pillar arrays with strong geometrical dependence [Letter to the editor]. Optics Letters, 40(9), 2072-2075
Open this publication in new window or tab >>Surface second harmonic generation from silicon pillar arrays with strong geometrical dependence
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2015 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 40, no 9, p. 2072-2075Article in journal, Letter (Refereed) Published
Abstract [en]

We present experimental demonstration and analysis of enhanced surface second harmonic generation (SHG) from hexagonal arrays of silicon pillars. Three sets of Si pillar samples with truncated cone-shaped pillar arrays having periods of 500, 1000, and 2000 nm, and corresponding average diameters of 200, 585 and 1550 nm, respectively, are fabricated by colloidal lithography and plasma dry etching. We have observed strong dependence of SHG intensity on the pillar geometry. Pillar arrays with a 1000 nm period and a 585 nm average diameter give more than a one order of magnitude higher SHG signal compared to the other two samples. We theoretically verified the dependence of SHG intensity on pillar geometry by finite difference time domain simulations in terms of the surface normal E-field component. The enhanced surface SHG light can be useful for nonlinear silicon photonics, surface/interface characterization, and optical biosensing.

Keywords
Spectroscopy, Nanopillars, Interfaces, Photonics, Harmonics, Boundary
National Category
Atom and Molecular Physics and Optics
Research subject
Physics
Identifiers
urn:nbn:se:kth:diva-168380 (URN)10.1364/OL.40.002072 (DOI)000353924600049 ()2-s2.0-84973601640 (Scopus ID)
Funder
Swedish Research Council, 621-2013-5811 349-2007-8664
Note

QC 20150612

Available from: 2015-06-02 Created: 2015-06-02 Last updated: 2017-12-04Bibliographically approved
Sanatinia, R., Westendorp, S., Anand, S. & Swillo, M. (2014). Enhanced second-harmonic generation in GaP nanopillars arrays by modal engineering. In: Optics InfoBase Conference Papers: . Paper presented at CLEO: Science and Innovations, CLEO_SI 2014, 8 June 2014 through 13 June 2014, San Jose, CA.
Open this publication in new window or tab >>Enhanced second-harmonic generation in GaP nanopillars arrays by modal engineering
2014 (English)In: Optics InfoBase Conference Papers, 2014Conference paper, Published paper (Refereed)
Abstract [en]

Second harmonic generation from GaP nanopillars with optimized mode field overlap is analyzed and experimentally demonstrated. We present dispersion engineering in arrays of nanopillars to satisfy modal phase matching.

Series
Optics InfoBase Conference Papers, ISSN 2162-2701
Keywords
Dispersions, Gallium alloys, Nonlinear optics, Dispersion engineering, Modal phase matching, Mode fields, Nanopillars, Nanopillars array, Second-harmonic, Nanostructures
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-167543 (URN)2-s2.0-84906871479 (Scopus ID)9781557529992 (ISBN)
Conference
CLEO: Science and Innovations, CLEO_SI 2014, 8 June 2014 through 13 June 2014, San Jose, CA
Note

QC 20150609

Available from: 2015-06-09 Created: 2015-05-22 Last updated: 2016-12-05Bibliographically approved
Sanatinia, R., Anand, S. & Swillo, M. (2014). Modal Engineering of Second-Harmonic Generation in Single GaP Nanopillars. Nano letters (Print), 14(9), 5376-5381
Open this publication in new window or tab >>Modal Engineering of Second-Harmonic Generation in Single GaP Nanopillars
2014 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 14, no 9, p. 5376-5381Article in journal (Refereed) Published
Abstract [en]

We report on modal dispersion engineering for second-harmonic generation (SHG) from single vertical GaP nanopillars/nanowaveguides, fabricated by a top-down approach, using optical modal overlap between the pump (830 nm) and SHG (415 nm). We present a modal analysis for the SHG process in GaP nanopillars and demonstrate efficient utilization of the longitudinal component of the nonlinear polarization density. Our SHG measurements show quantitatively the presented model. We experimentally demonstrate that polarization beam shaping and field distribution modification of the radiated SHG light, at nanometer scale, can be achieved by tuning the pillar diameter and linear pump polarization. SHG from single pillars can be used as femtosecond nanoscopic light sources at visible wavelengths applicable for single cell/molecular imaging and interesting for future integrated nanophotonics components. While this work focuses on GaP nanopillars, the results are applicable to other semiconductor nanowire materials and synthesis methods.

Keywords
Nanopillar, second-harmonic generation, modal dispersion, polarization, nanowaveguide, gallium phosphide
National Category
Nano Technology Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-150121 (URN)10.1021/nl502521y (DOI)000341544500070 ()25157424 (PubMedID)2-s2.0-84914168992 (Scopus ID)
Note

QC 20140919

Available from: 2014-08-30 Created: 2014-08-30 Last updated: 2017-12-05Bibliographically approved
Gallo, K., Stensson, K., Levenius, M., Swillo, M., Björk, G. & Conforti, M. (2014). Twin-Beam Parametric Processes in Nonlinear Photonic Crystals. In: : . Paper presented at 16th International Conference on Transparent Optical Networks (ICTON), JUL 06-10, 2014, Graz, AUSTRIA.
Open this publication in new window or tab >>Twin-Beam Parametric Processes in Nonlinear Photonic Crystals
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2014 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The talk will briefly introduce the technology and design principles for quadratic nonlinear photonic crystals and provide a few examples of optical functionalities affordable on this platform, with a particular focus on recent developments concerning frequency down-conversion and their implications for the engineering of novel parametric light sources for classical and quantum optics applications.

Series
International Conference on Transparent Optical Networks-ICTON, ISSN 2162-7339
Keywords
nonlinear photonic crystals, nonlinear optics, parametric generation, ferroelectrics
National Category
Telecommunications
Identifiers
urn:nbn:se:kth:diva-159041 (URN)10.1109/ICTON.2014.6876559 (DOI)000346516400295 ()2-s2.0-84906773429 (Scopus ID)9781479956005 (ISBN)
Conference
16th International Conference on Transparent Optical Networks (ICTON), JUL 06-10, 2014, Graz, AUSTRIA
Note

QC 20150203

Available from: 2015-02-03 Created: 2015-01-20 Last updated: 2017-03-24Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-2136-4914

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