Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Marek Nečada"'
Autor:
Aaro I. Väkeväinen, Antti J. Moilanen, Marek Nečada, Tommi K. Hakala, Konstantinos S. Daskalakis, Päivi Törmä
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-12 (2020)
Understanding the sub-picosecond dynamics of driven-dissipative condensates of interacting bosons is challenging. Here the authors combine a lattice of plasmonic nanoparticles with a dye molecule solution in strong coupling and reveal distinct lasing
Externí odkaz:
https://doaj.org/article/7748735dcbc349ebb836e73c80ddd83d
Autor:
Janne I Heikkinen, Benjamin Asamoah, Roman Calpe, Marek Nečada, Matias Koivurova, Tommi K Hakala
Publikováno v:
New Journal of Physics, Vol 24, Iss 12, p 123002 (2022)
We present a comprehensive study of the polarization and spatial coherence properties of the lasing modes supported by a four-fold symmetric plasmonic lattice. We can distinguish the scattering induced effects from the lattice geometry induced effect
Externí odkaz:
https://doaj.org/article/b3a6cfe668b54300bc31dce8eb0e335c
Autor:
Benjamin O Asamoah, Henri Partanen, Sughra Mohamed, Janne Heikkinen, Atri Halder, Matias Koivurova, Marek Nečada, Tero Setälä, Jari Turunen, Ari T Friberg, Tommi K Hakala
Publikováno v:
New Journal of Physics, Vol 23, Iss 6, p 063037 (2021)
We study beaming properties of laser light produced by a plasmonic lattice overlaid with organic fluorescent molecules. The crossover from spontaneous emission regime to stimulated emission regime is observed in response to increasing pump fluence. T
Externí odkaz:
https://doaj.org/article/3dc847a30e4a4873a2f12229e475235b
Autor:
Päivi, Marek Nečada Törmä
Publikováno v:
Communications in Computational Physics. 30:357-395
The multiple scattering method T-matrix (MSTMM) can be used to solve the electromagnetic response of systems consisting of many compact scatterers, retaining a good level of accuracy while using relatively few degrees of freedom, largely surpassing o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7d255f0ffabf2744c6905fa59c466bb
https://doi.org/10.4208/cicp.oa-2020-0136
https://doi.org/10.4208/cicp.oa-2020-0136
Autor:
Sughra Mohamed, Tero Setälä, Henri Partanen, Tommi K. Hakala, Ari T. Friberg, Benjamin O. Asamoah, Jari Turunen, Matias Koivurova, Janne Heikkinen, Marek Nečada, Atri Halder
Funding Information: The work was funded by the Academy of Finland (Projects 322002, 308393, 310511). The work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decisions 320166 and 320165. Publisher Cop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1813ee21c05eda595660a7db65d433f5
https://aaltodoc.aalto.fi/handle/123456789/108845
https://aaltodoc.aalto.fi/handle/123456789/108845
Publikováno v:
International Journal of Modern Physics B. 31(24):1-21
We introduce a generalized Dicke-like model to describe two-level systems coupled with a single bosonic mode. In addition, the two-level systems mutually interact via direct dipole–dipole interaction. We apply the model to an ensemble of dye molecu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1aa99703bb679c0b1a36ee37e7d5d76d
http://juuli.fi/Record/0283438217
http://juuli.fi/Record/0283438217
Autor:
Päivi Törmä, Tommi K. Hakala, Heikki Rekola, Jani-Petri Martikainen, Mikko Kataja, Francisco Freire-Fernández, Sara Pourjamal, Marek Nečada, Sebastiaan van Dijken
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
We report on lasing at visible wavelengths in arrays of ferromagnetic Ni nanodisks overlaid with an organic gain medium. We demonstrate that by placing an organic gain material within the mode volume of the plasmonic nanoparticles both the radiative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce5e8b660493db4eb3ffa11796973e47
https://trepo.tuni.fi/handle/10024/126928
https://trepo.tuni.fi/handle/10024/126928
Publikováno v:
Physical Review Letters. 122
We study lasing at the high-symmetry points of the Brillouin zone in a honeycomb plasmonic lattice. We use symmetry arguments to define singlet and doublet modes at the $\Kp$-points of the reciprocal space. We experimentally demonstrate lasing at the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6294f74df40bccbbf1e8e549645d444b
https://doi.org/10.1103/physrevlett.122.013901
https://doi.org/10.1103/physrevlett.122.013901
Autor:
Antti Moilanen, Jani P. Martikainen, Marek Nečada, Aaro I. Väkeväinen, Tommi K. Hakala, Heikki Rekola, Päivi Törmä
I review our recent findings on lasing / condensation in plasmonic nanoparticle lattices1-5. The system properties can be tailored with high precision, including the lasing / condensation energies, linewidths, as well as the dimensionality of the fee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b68f1ba6603dd2c4569d3f312cf1823a
https://aaltodoc.aalto.fi/handle/123456789/43046
https://aaltodoc.aalto.fi/handle/123456789/43046
Autor:
Jani-Petri Martikainen, Marek Nečada, Heikki Rekola, Aaro I. Väkeväinen, Tommi K. Hakala, Antti Moilanen, Päivi Törmä
Publikováno v:
Nature Communications
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Lasing at the nanometre scale promises strong light-matter interactions and ultrafast operation. Plasmonic resonances supported by metallic nanoparticles have extremely small mode volumes and high field enhancements, making them an ideal platform for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9286386f4e0aac2eca83dfc3d6ee69d
http://europepmc.org/articles/PMC5216126
http://europepmc.org/articles/PMC5216126