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Bailly E, Hugonin JP, Coudevylle JR, Dabard C, Ithurria S, Vest B, Greffet JJ. 2D Silver-Nanoplatelets Metasurface for Bright Directional Photoluminescence, Designed with the Local Kirchhoff's Law. ACS NANO 2024. [PMID: 38286025 DOI: 10.1021/acsnano.3c09874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Semiconductor colloidal nanocrystals are excellent light emitters in terms of efficiency and spectral control. They can be integrated with a metasurface to make ultrathin photoluminescent devices with a reduced amount of active material and perform complex functionalities such as beam shaping or polarization control. To design such a metasurface, a quantitative model of the emitted power is needed. Here, we report the design, fabrication, and characterization of a ∼300 nm thick light-emitting device combining a plasmonic metasurface with an ensemble of nanoplatelets. The source has been designed with a methodology based on a local form of Kirchhoff's law. The source displays record high directionality and absorptivity.
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Affiliation(s)
- Elise Bailly
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91120 Palaiseau, France
| | - Jean-Paul Hugonin
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91120 Palaiseau, France
| | - Jean-René Coudevylle
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France
| | - Corentin Dabard
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université UPMC Univ Paris 06, CNRS, 10 Rue Vauquelin, 75005 Paris, France
| | - Sandrine Ithurria
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université UPMC Univ Paris 06, CNRS, 10 Rue Vauquelin, 75005 Paris, France
| | - Benjamin Vest
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91120 Palaiseau, France
| | - Jean-Jacques Greffet
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91120 Palaiseau, France
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Mohtashami Y, Heki LK, Wong MS, Smith JM, Ewing JJ, Mitchell WJ, Nakamura S, DenBaars SP, Schuller JA. Metasurface Light-Emitting Diodes with Directional and Focused Emission. NANO LETTERS 2023; 23:10505-10511. [PMID: 37955625 DOI: 10.1021/acs.nanolett.3c03272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Phased-array metasurfaces enable the imprinting of complex beam structures onto coherent incident light. Recent demonstrations of photoluminescent phased-array metasurfaces highlight possibilities for achieving similar control in electroluminescent light-emitting diodes (LEDs). However, phased-array metasurface LEDs have not yet been demonstrated owing to the complexities of integrating device stacks and electrodes within nanopatterned metasurfaces. Here, we demonstrate metasurface LEDs that emit directional or focused light. We first design nanoribbon elements that achieve the requisite phase control within typical LED device constraints. Subsequently, we demonstrate unidirectional emission that can be engineered at will via phased-array concepts. This control is further exhibited in metasurface LEDs that directly emit focused beams. Finally, we show that these metasurface LEDs exhibit external quantum efficiencies (EQEs) superior to those of unpatterned LEDs. These results demonstrate metasurface designs that are compatible with high-EQE metal-free LED devices and portend opportunities for new classes of metasurface LEDs that directly produce complex beam structures.
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Affiliation(s)
- Yahya Mohtashami
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, United States
| | - Larry K Heki
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Matthew S Wong
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Solid State Lighting and Energy Electronics Center, University of California, Santa Barbara, California 93106, United States
| | - Jordan M Smith
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Solid State Lighting and Energy Electronics Center, University of California, Santa Barbara, California 93106, United States
| | - Jacob J Ewing
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Solid State Lighting and Energy Electronics Center, University of California, Santa Barbara, California 93106, United States
| | - William J Mitchell
- Nanofabrication Facility, University of California, Santa Barbara, California 93106, United States
| | - Shuji Nakamura
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Solid State Lighting and Energy Electronics Center, University of California, Santa Barbara, California 93106, United States
| | - Steven P DenBaars
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Solid State Lighting and Energy Electronics Center, University of California, Santa Barbara, California 93106, United States
| | - Jon A Schuller
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, United States
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