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Joo WJ, Kyoung J, Esfandyarpour M, Lee SH, Koo H, Song S, Kwon YN, Song SH, Bae JC, Jo A, Kwon MJ, Han SH, Kim SH, Hwang S, Brongersma ML. Metasurface-driven OLED displays beyond 10,000 pixels per inch. Science 2020; 370:459-463. [PMID: 33093108 DOI: 10.1126/science.abc8530] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/07/2020] [Indexed: 12/20/2022]
Abstract
Optical metasurfaces are starting to find their way into integrated devices, where they can enhance and control the emission, modulation, dynamic shaping, and detection of light waves. In this study, we show that the architecture of organic light-emitting diode (OLED) displays can be completely reenvisioned through the introduction of nanopatterned metasurface mirrors. In the resulting meta-OLED displays, different metasurface patterns define red, green, and blue pixels and ensure optimized extraction of these colors from organic, white light emitters. This new architecture facilitates the creation of devices at the ultrahigh pixel densities (>10,000 pixels per inch) required in emerging display applications (for instance, augmented reality) that use scalable nanoimprint lithography. The fabricated pixels also offer twice the luminescence efficiency and superior color purity relative to standard color-filtered white OLEDs.
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Affiliation(s)
- Won-Jae Joo
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea.
| | - Jisoo Kyoung
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Majid Esfandyarpour
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA
| | - Sung-Hoon Lee
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Hyun Koo
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Sunjin Song
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Young-Nam Kwon
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Seok Ho Song
- Department of Physics, Hanyang University, Seoul, 04763, Korea
| | - Jun Cheol Bae
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Ara Jo
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Myong-Jong Kwon
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Sung Hyun Han
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Sung-Han Kim
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Sungwoo Hwang
- Samsung Advanced Institute of Technology, Samsung Electronics, Suwon, 16678, Korea
| | - Mark L Brongersma
- Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
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Adamo G, Swaha Krishnamoorthy HN, Cortecchia D, Chaudhary B, Nalla V, Zheludev NI, Soci C. Metamaterial Enhancement of Metal-Halide Perovskite Luminescence. NANO LETTERS 2020; 20:7906-7911. [PMID: 33090800 DOI: 10.1021/acs.nanolett.0c02571] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal-halide perovskites are rapidly emerging as solution-processable optical materials for light-emitting applications. Here, we adopt a plasmonic metamaterial approach to enhance photoluminescence emission and extraction of methylammonium lead iodide (MAPbI3) thin films based on the Purcell effect. We show that hybridization of the active metal-halide film with resonant nanoscale sized slits carved into a gold film can yield more than 1 order of magnitude enhancement of luminescence intensity and nearly 3-fold reduction of luminescence lifetime corresponding to a Purcell enhancement factor of more than 300. These results show the effectiveness of resonant nanostructures in controlling metal-halide perovskite light emission properties over a tunable spectral range, a viable approach toward highly efficient perovskite light-emitting devices and single-photon emitters.
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Affiliation(s)
- Giorgio Adamo
- Centre for Disruptive Photonic Technologies, TPI, SPMS, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | | | - Daniele Cortecchia
- Energy Research Institute at NTU (ERI@N), Research Techno Plaza, Nanyang Technological University, 50 Nanyang Drive, Singapore 6375533
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore 639798
| | - Bhumika Chaudhary
- Energy Research Institute at NTU (ERI@N), Research Techno Plaza, Nanyang Technological University, 50 Nanyang Drive, Singapore 6375533
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore 639798
| | - Venkatram Nalla
- Centre for Disruptive Photonic Technologies, TPI, SPMS, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Nikolay I Zheludev
- Centre for Disruptive Photonic Technologies, TPI, SPMS, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
- Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Cesare Soci
- Centre for Disruptive Photonic Technologies, TPI, SPMS, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
- Energy Research Institute at NTU (ERI@N), Research Techno Plaza, Nanyang Technological University, 50 Nanyang Drive, Singapore 6375533
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Ye M, Li SQ, Gao Y, Crozier KB. Long-wave infrared magnetic mirror based on Mie resonators on conductive substrate. OPTICS EXPRESS 2020; 28:1472-1491. [PMID: 32121857 DOI: 10.1364/oe.378940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
Metal films are often used in optoelectronic devices as mirrors and/or electrical contacts. In many such devices, however, the π-phase shift of the electric field that occurs upon reflection from a perfect electric conductor (for which a metal mirror is a reasonable approximation) is undesirable. This is because it results in the total electric field being zero at the mirror surface, which is unfavorable if one wishes for example to enhance absorption by a material placed there. This has motivated the development of structures that reflect light with zero phase shift, as these lead to the electric field having an anti-node (rather than node) at the surface. These structures have been denoted by a variety of terms, including magnetic mirrors, magnetic conductors, and high impedance surfaces. In this work, we experimentally demonstrate a long-wave infrared device that we term a magnetic mirror. It comprises an array of amorphous silicon cuboids on a gold film. Our measurements demonstrate a phase shift of zero and a high reflectance (of ∼90%) at a wavelength of 8.4 µm. We present the results of a multipole analysis that provides insight into the physical mechanism. Lastly, we investigate the use of our structure in a photodetector application by performing simulations of the optical absorption by monolayer graphene placed on the cuboids.
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