Polarization dependent beaming properties of a plasmonic lattice laser
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. This transition is accompanied by a strong reductio...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac0286 |
| _version_ | 1797750056882798592 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Benjamin O Asamoah |
| collection | DOAJ |
| description | 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. This transition is accompanied by a strong reduction of beam divergence and emission linewidth due to increased degree of spatial and temporal coherence, respectively. The feedback for the lasing signal is shown to be mainly one-dimensional due to the dipolar nature of the surface lattice resonance. Consequently, the beaming properties along x and y directions are drastically different. From the measurements, we obtain the M ^2 value along both principal directions of the square lattice as a function of the pump fluence. Our work provides the first detailed analysis of the beam quality in plasmonic lattice lasers and reveals the underlying physical origin of the observed strong polarization dependent asymmetry of the lasing signal. |
| first_indexed | 2024-03-12T16:27:20Z |
| format | Article |
| id | doaj.art-3dc847a30e4a4873a2f12229e475235b |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:27:20Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-3dc847a30e4a4873a2f12229e475235b2023-08-08T15:39:20ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123606303710.1088/1367-2630/ac0286Polarization dependent beaming properties of a plasmonic lattice laserBenjamin O Asamoah0https://orcid.org/0000-0002-7084-2313Henri Partanen1Sughra Mohamed2Janne Heikkinen3Atri Halder4https://orcid.org/0000-0002-5960-4680Matias Koivurova5https://orcid.org/0000-0001-6100-6316Marek Nečada6Tero Setälä7Jari Turunen8Ari T Friberg9Tommi K Hakala10https://orcid.org/0000-0003-3853-4668Institute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandFaculty of Engineering and Natural Sciences, Photonics, Tampere University , FI-33720 Tampere, FinlandDepartment of Applied Physics, Aalto University School of Science , FI-00076 Aalto, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandInstitute of Photonics, University of Eastern Finland , PO Box 111, FI-80101 Joensuu, FinlandWe 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. This transition is accompanied by a strong reduction of beam divergence and emission linewidth due to increased degree of spatial and temporal coherence, respectively. The feedback for the lasing signal is shown to be mainly one-dimensional due to the dipolar nature of the surface lattice resonance. Consequently, the beaming properties along x and y directions are drastically different. From the measurements, we obtain the M ^2 value along both principal directions of the square lattice as a function of the pump fluence. Our work provides the first detailed analysis of the beam quality in plasmonic lattice lasers and reveals the underlying physical origin of the observed strong polarization dependent asymmetry of the lasing signal.https://doi.org/10.1088/1367-2630/ac0286plasmonslasingM-squaredpolarizationdegree of coherencebeaming |
| spellingShingle | 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 Polarization dependent beaming properties of a plasmonic lattice laser New Journal of Physics plasmons lasing M-squared polarization degree of coherence beaming |
| title | Polarization dependent beaming properties of a plasmonic lattice laser |
| title_full | Polarization dependent beaming properties of a plasmonic lattice laser |
| title_fullStr | Polarization dependent beaming properties of a plasmonic lattice laser |
| title_full_unstemmed | Polarization dependent beaming properties of a plasmonic lattice laser |
| title_short | Polarization dependent beaming properties of a plasmonic lattice laser |
| title_sort | polarization dependent beaming properties of a plasmonic lattice laser |
| topic | plasmons lasing M-squared polarization degree of coherence beaming |
| url | https://doi.org/10.1088/1367-2630/ac0286 |
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