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  • 1. Arias, Augusto
    et al.
    Etcheverry, Sebastian
    Solano, Pablo
    Staforelli, Juan
    Gallardo, Maria Jose
    Rubinsztein-Dunlop, Helina
    Saavedra, Carlos
    Simultaneous rotation, orientation and displacement control of birefringent microparticles in holographic optical tweezers2013Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 21, nr 1, s. 102-111Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report the experimental implementation of a new method for generating multiple dynamical optical tweezers, where each one of them is generated with an independent linear polarization state with arbitrary orientation. This also allows an independent simultaneous polarization-rotation control. The laser beam, both for generating multiple traps and polarization control, has been modulated using a single reflective nematic liquid crystal with parallel alignment. We present experimental results of controlled displacement, orientation and rotation of birefringent particles. In addition, a simple method for estimating and canceling out the primary astigmatism present in the system is presented.

  • 2.
    Etcheverry Cabrera, Sebastian
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Advanced all-fiber optofluidic devices2017Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Significant technological advances of the last years have been possible by developments in Optofluidics, which is a field that deals with the integration of optics and microfluidics into single devices.

    The work described in this thesis is based on five scientific publications related to the use of fiber optic technology to build integrated optofluidic devices. The first three publications are within the field of life-science and point towards in-vivo and point-of-care applications, whereas the last two publications cover the study and the use of plasmonic nanoparticles for electrical modulation of light.

    Aiming at developing useful tools for in-vivo biological applications, the first publication consists of designing and testing a functional optical fiber for real-time monitoring and selective collection of fluorescent microparticles. This probe relies on a microstructured optical fiber with a hole along its cladding, which is used to selectively aspirate individual particles of interest once their fluorescence signal is detected. On the same line of research, the second publication contemplates the fabrication of a fiber probe that traps single microparticles and allows for remote detection of their optical properties. This probe is also based on a microstructured fiber that enables particle trapping by fluidic forces. The third publication addresses the development of an all-fiber miniaturized flow cytometer for point-of-care applications. This system can analyze, with excellent accuracy and sensitivity, up to 2500 cells per second by measuring their fluorescence and scattering signal. A novel microfluidic technique, called Elasto-inertial microfluidics, is employed for aligning the cells into a single-stream to optimize detection and throughput.

    The fourth publication involves the experimental and theoretical study of the electrical-induced alignment of plasmonic gold nanorods in suspension and its applicability to control light transmission. This study is done by using an all-fiber optofluidic device, based on a liquid-core fiber, which facilitates the interaction of light, electric fields, and liquid suspensions. Results show that nanorods can be aligned in microseconds, providing a much better performance than liquid-crystal devices. Finally, the fifth publication consists of an upgrade of the previous device by integrating four electrodes in the cladding of the liquid-core fiber. This improvement enables nanosecond response time and the possibility of digitally switching nanorods between two orthogonal aligned states, overcoming the limitation of slow thermal relaxation.

    The work presented here shows that optofluidics based on optical fibers is a robust and convenient platform, as well as a promising direction for the developing of novel instruments in fields such as life-science, non-linear optics, plasmonic, and sensing.

  • 3.
    Etcheverry, S.
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Faridi, A.
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Ramachandraiah, H.
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Margulis, W.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Laurell, F.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Russom, A.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Optofludics in microstructured fibers combining particle elasto-inertial focusing and fluorescence2016Inngår i: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE conference proceedings, 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Optofluidics is exploited in an all-fiber component to detect and identify through fluorescence particles flowing at high rate and inertially focused in a capillary. The system represents a first step towards an in-fiber flow cytometer.

  • 4.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Araujo, Leonardo F.
    Carvalho, Isabel C. S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Rise ACREO AB, Sweden.
    Fontana, Jake
    Digital switching of plasmonic nanorods with nanosecond response timesInngår i: Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We demonstrate the digital electric field induced switching of plasmonic nanorods between "1" and "0" orthogonal aligned states using an electro-optic fluid fiber component.  We show by digitally switching the nanorods, that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve submicrosecond switching times.  We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 nanoseconds. The high-speed digital switching of plasmonic nanorods integrated into an all-fiber optical component may provide novel opportunities for remote sensing and signaling applications.

  • 5.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. Department of Fiber Optics, RISE Acreo, Box 1070, SE-164 25, Kista, Sweden.
    Araujo, Leonardo F.
    Carvalho, Isabel
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Department of Fiber Optics, RISE Acreo, Box 1070, SE-164 25, Kista, Sweden.
    Fontana, Jake
    Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiberInngår i: Applied Ecology and Environmental Research, ISSN 1589-1623, E-ISSN 1785-0037Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We demonstrate the digital electric eld induced switching of plasmonic nanorods between 1 and 0 orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods, that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve sub-microsecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 nanoseconds. The high-speed digital switching of plasmonic nanorods integrated into an all-ber optical component may provide novel opportunities for remote sensing and signaling applications.

  • 6.
    Etcheverry, Sebastian
    et al.
    Center for optics and photonics,Univesity of Concepcion.
    Cañas, Gustavo
    S. Gomez, Esteban
    Nogueira, Wallon
    Saaveda, Carlos
    Xavier, Guilherme
    Lima, Gustavo
    Quantum key distribution session with 16-dimensional photonic states2013Inngår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, nr 3, s. 2316-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The secure transfer of information is an important problem in modern telecommunications. Quantum key distribution (QKD) provides a solution to this problem by using individual quantum systems to generate correlated bits between remote parties, that can be used to extract a secret key. QKD with D-dimensional quantum channels provides security advantages that grow with increasing D. However, the vast majority of QKD implementations has been restricted to two dimensions. Here we demonstrate the feasibility of using higher dimensions for real-world quantum cryptography by performing, for the first time, a fully automated QKD session based on the BB84 protocol with 16-dimensional quantum states. Information is encoded in the single-photon transverse momentum and the required states are dynamically generated with programmable spatial light modulators. Our setup paves the way for future developments in the field of experimental high-dimensional QKD.

  • 7.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Faridi, Asim
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Ramachandraiah, Harisha
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Kumar, Tharagan
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    All silica fibre microflow cytometerManuskript (preprint) (Annet vitenskapelig)
    Abstract [en]

    Flow cytometry is currently the gold standard for analysis of cells in the medical laboratory and biomedical research. Fuelled by the need of point-of-care diagnosis, a significant effort has been made to miniaturize and reduce cost of flow cytometers. However, despite recent advances, current microsystems remain less versatile and much slower than their large-scale counterparts. In this work, an all-silica fibre microflow cytometer is presented that measures fluorescence and scattering from particles and cells. It integrates cell transport in circular capillaries and light delivery by optical fibres   Single-stream cell focusing is performed by Elasto-inertial microfluidics to guarantee optical accuracy and sensitivity.  The capability of this technique is extended to high flow rates (up to 800 µl/min), enabling throughput of 2500 particles/s. The robust, portable and low-cost system described here could be the basis for a point-of-care flow cytometer with a performance comparable to commercial systems. 

  • 8.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Faridi, Muhammad Asim
    KTH. mafaridi@kth.se.
    Ramachandraiah, Harisha
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Margulis, Walter
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Optical Fiber inertial focusing based micro FlowcytometerInngår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Flow cytometry is a powerful method for analysis of cells and particles. Fueled by the need for point of care diagnostic applications, a significant effort has been made to miniaturize flow cytometry. However, despite recent advances, current microflow cytometers remain less versatile and much slower than their large-scale counterparts. Here, we present a portable all-silica optofluidic device that integrates particle focusing in flow through cylindrical silica capillaries and light delivery in optical fibers to simultaneously measure fluorescence and scattering from cells and particles at a rate of 2500 particles/s – a throughput comparable to conventional cytometers. Precise 3D cell focusing and ordering is accomplished using extended elasto-inertial focusing (EEF), a key enabler for eliminating the sheath fluid commonly employed in flow cytometry with maintained high throughput. We demonstrate simultaneously two-color fluorescence and scattering measurement of different sized particles and cells. This robust and low-cost optofluidic device, assembled without the need of clean-room facilities, is ideal suited for point of care applications.

  • 9.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Fluidic trapping and optical detection of microparticles with a functional optical fiberInngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    A fiber probe is presented that traps single micro-sized particles and allows detection of their optical properties. The trapping mechanism used is based on fluid suction with a micro-structured optical fiber that has five holes along its cladding. Proof-of-principle experiments with a diluted solution of fluorescently labeled particles are performed. The fiber probe presented here may find various applications in life-science and environmental monitoring.  

  • 10.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Kvantelektronik och -optik, QEO. Acreo Swedish ICT AB, Dept Fiber Opt, Sweden.
    Sudirman, Aziza
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    Acreo Swedish ICT AB, Sweden.
    Identification andretrieval of particles with microstructured optical fibers2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A system where laser light is coupled into a fiber with longitudinal holes is used to identify and collect fluorescent particles from a solution, mimicking automatic fiber-based separation of tagged cancer cells in the body.

  • 11.
    Etcheverry, Sebastian
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT AB, Sweden.
    Sudirman, Aziza
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT AB, Sweden.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT AB, Sweden.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Identification and collection of particles with optical fibers2015Inngår i: NOVEL BIOPHOTONICS TECHNIQUES AND APPLICATIONS III, 2015, Vol. 9540, artikkel-id 95400NKonferansepaper (Fagfellevurdert)
    Abstract [en]

    A micro-structured fiber-based system for identification and collection of fluorescent particles is demonstrated. An optical fiber probe with longitudinal holes in the cladding is used to retrieve fluorescent particles by exerting microfluidics forces. Laser induced fluorescent (LIF) is carried out by the fiber probe and an optical setup. When a particle with a previously chosen fluorescence wavelength is identified, a vacuum pump is activated collecting the particle into a hole. Green and red fluorescent polystyrene particles were detected and selectively retrieved.

  • 12.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo, Sweden.
    Araujo, Leonardo F.
    Carvalho, Isabel C. S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo, Sweden.
    Fontana, Jake
    Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiber2017Inngår i: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, nr 22, artikkel-id 221108Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We demonstrate the digital electric field induced switching of plasmonic nanorods between "1" and "0" orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve submicrosecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 ns. The high-speed digital switching of plasmonic nanorods integrated into an all-fiber optical component may provide opportunities for remote sensing and signaling applications.

  • 13.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Araujo, Leonardo F.
    da Costa, Greice K. B.
    Pereira, Joao M. B.
    Camara, Alexandre R.
    Naciri, Jawad
    Ratna, Banahalli R.
    Hernandez-Romano, Ivan
    de Matos, Christiano J. S.
    Carvalho, Isabel C. S.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Fontana, Jake
    Microsecond switching of plasmonic nanorods in an all-fiber optofluidic component2017Inngår i: Optica, ISSN 2334-2536, Vol. 4, nr 8, s. 864-870Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    As information technologies move from electron-to photon-based systems, the need to rapidly modulate light is of paramount importance. Here, we study the evolution of the electric-field-induced alignment of gold nanorods suspended in organic solvents. The experiments were performed using an all-fiber optofluidic device, which enables convenient interaction of light, electric fields, and the nanorod suspension. We demonstrate microsecond nanorod switching times, three orders of magnitude faster than a traditional Freederickcz-based liquid crystal alignment mechanism. We find that the dynamics of the alignment agrees well with the Einstein-Smoluchowski relationship, allowing for the determination of the rotational diffusion coefficient and polarizability anisotropy of the nanorods as well as the effective length of the ligands capping the nanorods. The ability to dynamically control the optical properties of these plasmonic suspensions coupled with the point-to-point delivery of light from the fiber component, as demonstrated in this work, may enable novel ultrafast optical switches, filters, displays, and spatial light modulators.

  • 14.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Faridi, Muhammad Asim
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Ramachandraiah, Harisha
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Kumar, T.
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. RISE Acreo AB, Sweden.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    High performance micro-flow cytometer based on optical fibres2017Inngår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, artikkel-id 5628Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Flow cytometry is currently the gold standard for analysis of cells in the medical laboratory and biomedical research. Fuelled by the need of point-of-care diagnosis, a significant effort has been made to miniaturize and reduce cost of flow cytometers. However, despite recent advances, current microsystems remain less versatile and much slower than their large-scale counterparts. In this work, an all-silica fibre microflow cytometer is presented that measures fluorescence and scattering from particles and cells. It integrates cell transport in circular capillaries and light delivery by optical fibres. Single-stream cell focusing is performed by Elasto-inertial microfluidics to guarantee accurate and sensitive detection. The capability of this technique is extended to high flow rates (up to 800 mu l/min), enabling a throughput of 2500 particles/s. The robust, portable and low-cost system described here could be the basis for a point-of-care flow cytometer with a performance comparable to commercial systems.

  • 15.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Dept. of Fiber Optics, Acreo Swedish ICT AB, Sweden .
    Faridi, Muhammad Asim
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Ramachandraiah, Harisha
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    Margulis, W.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi.
    All fiber based micro-flow cytometer by combining optical fiber with inertial focusing2016Inngår i: 20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016, Chemical and Biological Microsystems Society , 2016, s. 1655-1656Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Towards a portable point of care flow cytometry platform, we present here an integrated all optical fiber-based optofluidic system capable of counting and discriminating fluorescent particles and cells. The robust and compact device incorporates optical fibers and circular capillaries to build an all-fiber optofluidic device to enable counting particles based on their fluorescent and back-scatter light emission. Here, we combine this with inertial- and elasto-inertial microfluidics for sheathless particle and cell focusing for integrated detection with scattering and fluorescence detections - all necessary components of standard cytometers. We validated the system for cell counting based on scattering and fluorescence.

  • 16.
    Etcheverry, Sebastián
    et al.
    Universidad de Concepción, Chile .
    Gallado, Maria Jose
    Solano, Pablo
    Suwalsky, Mario
    Mesquita, Oscar
    Saavedra, Carlos
    Real-time study of shape and thermal fluctuations in the echinocyte transformation of human erythrocytes using defocusing microscopy2012Inngår i: Journal of Biomedical Optics, ISSN 1083-3668, E-ISSN 1560-2281, Vol. 17, nr 10, s. 106013-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We present a real-time method to measure the amplitude of thermal fluctuations in biological membranes by means of a new treatment of the defocusing microscopy (DM) optical technique. This approach was also applied to study the deformation of human erythrocytes to its echinocyte structure. This was carried out by making three-dimensional shape reconstructions of the cell and measuring the thermal fluctuations of its membrane, as the cell is exposed to the anti-inflammatory drug naproxen and as it recovers its original shape, when it is subsequently cleansed of the drug. The results showed biomechanical changes in the membrane even at low naproxen concentration (0.2 mM). Also, we found that when the cell recovered its original shape, the membrane properties were different compared to the nondrugged initial erythrocyte, indicating that the drug administration-recovery process is not completely reversible.

  • 17.
    Etcheverry, Sebastián
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Department of Fiber Optics, RISE Acreo AB, Stockholm, Sweden.
    Russom, Aman
    KTH, Skolan för bioteknologi (BIO), Proteomik och nanobioteknologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Trapping and optical identification of microparticles in a liquid with a functional optical fiber probe2018Inngår i: Optics InfoBase Conference Papers, Optical Society of America, 2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A fiber probe traps single micrometer-particles by fluid suction into a hollow microstructure and enables optical identification by the fluorescence light collected in a fiber core. The probe finds applications in life-science and environmental monitoring.

  • 18.
    Sudirman, Azizahalhakim
    et al.
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Kvantelektronik och -optik, QEO. Acreo Swedish ICT AB, Dept Fiber Opt, Sweden.
    Etcheverry, Sebastian
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik. Acreo Swedish ICT AB, Dept Fiber Opt, Sweden.
    Stjernström, Mårten
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Kvantelektronik och -optik, QEO.
    Laurell, Fredrik
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik.
    Margulis, Walter
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik, Laserfysik. Acreo Swedish ICT AB, Dept Fiber Opt, Sweden.
    A fiber optic system for detection and collection of micrometer-size particles2014Inngår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 22, nr 18, s. 21480-21487Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An optical fiber containing longitudinal holes adjacent to the core has been used to detect and collect fluorescent particles from a solution. Excitation light was launched through the fiber and fluorescence signal was guided back to a detector system. As a proof of principle, green and red fluorescent polystyrene beads were detected and selectively collected from a water solution containing a mixture of red and green fluorescent beads.

  • 19.
    Vasileva, Elena
    et al.
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.
    Fei, Ye
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Funktionella material, FNM.
    Marinins, Aleksandrs
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.
    Etcheverry, Sebastián
    KTH, Skolan för teknikvetenskap (SCI), Tillämpad fysik.
    Toprak, Muhammet
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik.
    Popov, Sergei Yu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.
    Optimization of optical gain in composite materials containing Rh6G dye and gold nanoparticles2015Inngår i: Asia Communications and Photonics Conference, ACPC 2015, 2015Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The existence of metal nanoparticles in a dye material can lead not only to quenching or enhancement of dye luminescence, or random lasing action, but also to the change of the fundamental material characteristic as optical gain. © 2015 OSA.

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