Abstract
Rare-earth-doped nanocrystals are emerging light sources that can produce tunable emissions in colours and lifetimes, which has been typically achieved in chemistry and material science. However, one important optical challenge - polarization of photoluminescence - remains largely out of control by chemistry methods. Control over photoluminescence polarization can be gained via coupling of emitters to resonant nanostructures such as optical antennas and metasurfaces. However, the resulting polarization is typically sensitive to position disorder of emitters, which is difficult to mitigate. Recently, new classes of disorder-immune optical systems have been explored within the framework of topological photonics. Here we explore disorder-robust topological arrays of Mie-resonant nanoparticles for polarization control of photoluminescence of nanocrystals. We demonstrate polarized emission from rare-earth-doped nanocrystals governed by photonic topological edge states supported by zigzag arrays of dielectric resonators. We verify the topological origin of polarized photoluminescence by comparing emission from nanoparticles coupled to topologically trivial and nontrivial arrays of nanoresonators. We expect that our results may open a new direction in the study of topology-enable emission properties of topological edge states in many photonic systems.
Original language | English |
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Pages (from-to) | 435-441 |
Number of pages | 7 |
Journal | Nanophotonics |
Volume | 10 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2021 |
Funding
Research funding : Australian Research Council (grants DP200101168 and DE180100669), Strategic Fund of the Australian National University, and China Scholarship Council (grant 201706120322). A part of this research was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. A.T. and S.K. thank Barry Luther-Davies for useful discussions and experimental support. S.K. thanks Alexander Poddubny for useful discussions and also acknowledges a financial support from the Alexander von Humboldt Foundation.
Keywords
- edge states
- nanophotonics
- polarization control
- rare-earth-doped nanocrystals
- topological photonics