Developing coherent light sources from van der Waals heterostructures coupled to plasmonic lattices

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• Antti J. Moilanen (ETH Zurich)
• Wednesday 04 October 2023, 14:00-15:00
• PHYW-SR1 (103).

If you have a question about this talk, please contact Dr Miguel Navarro-Cia.

Plasmonic lattices, periodic arrays of metal nanoparticles, have been used to modify the photoluminescence (PL) properties of emitters such as fluorescent molecules and quantum dots [1], leading ultimately to the generation of coherent light by lasing or Bose–Einstein condensation (BEC) [2-5]. While most of the previous works have relied on optical excitation of the gain material, electrically excited gain materials would be desirable for on-chip integration. Two-dimensional semiconducting materials, monolayers of transition metal dichalcogenides (TMDs), have a direct optical bandgap and excitons with high binding energies, making TMDs a promising class of materials for light-emitting optoelectronic devices. In this talk I will present the first steps taken toward novel nanoscale coherent light sources by incorporating TMDs into plasmonic lattices.

References:

1. Wang et al., The rich photonic world of plasmonic nanoparticle arrays, Materials Today, 21, 3 (2018)
2. Hakala et al., Lasing in dark and bright modes of a finite-sized plasmonic lattice, Nat. Comm. 8: 13687 (2017)
3. Hakala & Moilanen et al., Bose–Einstein condensation in a plasmonic lattice, Nat. Phys. 14, 739–744 (2018)
4. Väkeväinen, et al., Sub-picosecond thermalization dynamics in condensation of strongly coupled lattice plasmons, Nat. Comm. 11, 3139 (2020)
5. Moilanen et al., Spatial and temporal coherence in strongly coupled plasmonic Bose–Einstein condensates, PRL 127 , 255301 (2021)

This talk is part of the Metamaterials and Nanophotonics Group Seminars series.

This talk is included in these lists:

• Bham Talks
• Metamaterials and Nanophotonics Group Seminars
• PHYW-SR1 (103)
• What's on in Physics?

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