Research Briefing |
Featured
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News & Views |
Tuning light by the vibes
The emission wavelengths of semiconductor lasers based on group-IV materials can be efficiently reconfigured by using strained nanomechanical resonators.
- Fabio Pezzoli
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Article |
Actively tunable laser action in GeSn nanomechanical oscillators
An on-chip tunable laser operates by harnessing nanomechanical resonances at the radio frequency, achieving ultralow tuning power consumption.
- Hyo-Jun Joo
- , Jiawen Liu
- & Donguk Nam
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Article |
Nanosurface-reconstructed perovskite for highly efficient and stable active-matrix light-emitting diode display
Acid-etching-driven nanosurface reconstruction of perovskite quantum-dot pure-red LEDs facilitates a peak external quantum efficiency of 28.5% and a half-lifetime of 30 h at 100 cd m−2 luminance, enabling highly efficient solution-processed active-matrix perovskite displays.
- Hongjin Li
- , Yifeng Feng
- & Zhizhen Ye
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Article |
Upconversion electroluminescence in 2D semiconductors integrated with plasmonic tunnel junctions
Plasmonic tunnel junctions integrated with a monolayer semiconductor are found to emit photons with energies exceeding the input electrical potential. This peculiar phenomenon is ascribed to being triggered by inelastic electron tunnelling dipoles inducing optically forbidden transitions in the carrier injection electrode.
- Zhe Wang
- , Vijith Kalathingal
- & Goki Eda
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Article |
Valley-centre tandem perovskite light-emitting diodes
A hybrid valley-centre tandem optical structure that combines perovskites and organic light-emitting diodes is demonstrated to obtain an efficient emitting device, showing the commercial potential of perovskite displays.
- Hyeon-Dong Lee
- , Seung-Je Woo
- & Tae-Woo Lee
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Article |
Spin coating epitaxial heterodimensional tin perovskites for light-emitting diodes
A one-step spin-coating approach to fabricate scalable epitaxial heterodimensional tin perovskite thin films results in near-infrared tin perovskite LEDs with a peak external quantum efficiency of 11.6%.
- Hao Min
- , Nana Wang
- & Jianpu Wang
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Article |
Optical gain and lasing from bulk cadmium sulfide nanocrystals through bandgap renormalization
Solution-processable CdS ‘bulk’ nanocrystals show efficient on-chip lasing under quasi-continuous-wave conditions with excellent beam quality and pump thresholds.
- Ivo Tanghe
- , Margarita Samoli
- & Pieter Geiregat
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Review Article |
Light management for perovskite light-emitting diodes
This Review analyses the mechanisms of light extraction from perovskite light-emitting diodes and suggests new approaches towards ultrahigh electroluminescence efficiencies.
- Baodan Zhao
- , Maria Vasilopoulou
- & Dawei Di
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Article |
Minimizing heat generation in quantum dot light-emitting diodes by increasing quasi-Fermi-level splitting
Quantum dot LED brightness can be enhanced at low driving voltage using a monolayer of large quantum dots to reduce the packing number in the emitting layer and minimize heat generation.
- Yan Gao
- , Bo Li
- & Zuliang Du
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Article |
Far-field coupling between moiré photonic lattices
An ultralong-range coupling was demonstrated between photonic lattices in bilayer and multilayer moiré architectures, which is mediated by dark surface lattice resonances in the vertical direction.
- Jun Guan
- , Jingtian Hu
- & Teri W. Odom
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Article |
Exploiting the full advantages of colloidal perovskite nanocrystals for large-area efficient light-emitting diodes
A modified bar-coating method enables the realization of efficient large-area perovskite light-emitting diodes with high uniformity.
- Young-Hoon Kim
- , Jinwoo Park
- & Tae-Woo Lee
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Article |
Nanoscale chemical heterogeneity dominates the optoelectronic response of alloyed perovskite solar cells
A combination of quantitative optical spectroscopic techniques and synchrotron nanoprobe measurements enable a visualization of the nanoscale chemical, structural and optoelectronic landscape in halide perovskite devices.
- Kyle Frohna
- , Miguel Anaya
- & Samuel D. Stranks
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Comment |
To nano or not to nano for bright halide perovskite emitters
The halide perovskite family has, arguably, become today’s most promising emerging materials sets for optoelectronic applications. Here, we discuss the underperformance to date of the colloidal nanocrystal forms of these materials when employed in electroluminescent lighting devices relative to their counterparts, in which the emitter layer is in the form of polycrystalline films. However, we highlight the bright future of halide perovskite colloidal nanocrystals in light-emission technologies such as LCD displays, quantum light sources and even alternative LED configurations, as well as key guidelines for their further development to get there.
- Javad Shamsi
- , Gabriele Rainò
- & Samuel D. Stranks
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Article |
Magic-angle lasers in nanostructured moiré superlattice
Twisted photonic graphene superlattices enable the realization of high-performance room-temperature magic-angle lasers.
- Xin-Rui Mao
- , Zeng-Kai Shao
- & Ren-Min Ma
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Review Article |
Nanophotonics for light detection and ranging technology
This Review highlights the technological challenges linked to the application of nanophotonics for light detection and ranging (LiDAR).
- Inki Kim
- , Renato Juliano Martins
- & Junsuk Rho
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Letter |
Bipolar-shell resurfacing for blue LEDs based on strongly confined perovskite quantum dots
A solution-based ligand-exchange strategy enables the realization of close-packed quantum dot solid films with near-unity photoluminescence quantum yield and high charge carrier mobility.
- Yitong Dong
- , Ya-Kun Wang
- & Edward H. Sargent
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Article |
Metasurface-integrated vertical cavity surface-emitting lasers for programmable directional lasing emissions
Non-intrusive integration of metasurfaces with vertical cavity surface-emitting lasers enables fully arbitrary wavefront control for directional laser emission.
- Yi-Yang Xie
- , Pei-Nan Ni
- & Patrice Genevet
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Article |
A high-performance topological bulk laser based on band-inversion-induced reflection
The interface between photonic crystals with distinct in-band topologies confines electromagnetic modes and gives rise to lasing emission in the bulk.
- Zeng-Kai Shao
- , Hua-Zhou Chen
- & Ren-Min Ma
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Letter |
A room-temperature polariton light-emitting diode based on monolayer WS2
van der Waals materials enable the realization of an electrically driven polariton LED operating at room temperature.
- Jie Gu
- , Biswanath Chakraborty
- & Vinod M. Menon
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Article |
Optically switchable organic light-emitting transistors
A combination of light-emitting semiconductors and photochromic molecules enables the fabrication of optically switchable organic light-emitting transistors with tunable current and luminance.
- Lili Hou
- , Xiaoyan Zhang
- & Paolo Samorì
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Article |
High-efficiency colloidal quantum dot infrared light-emitting diodes via engineering at the supra-nanocrystalline level
PbS quantum dot ternary blends enable the realization of high-efficiency colloidal quantum dot infrared light-emitting diodes
- Santanu Pradhan
- , Francesco Di Stasio
- & Gerasimos Konstantatos
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Article |
Directional lasing in resonant semiconductor nanoantenna arrays
Active dielectric nanoantenna arrays exhibit low-threshold and high-quality-factor directional lasing achieved via a leaky resonance excited in coupled gallium arsenide (GaAs) nanopillars.
- Son Tung Ha
- , Yuan Hsing Fu
- & Arseniy I. Kuznetsov
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Letter |
Continuous-wave upconverting nanoparticle microlasers
Energy-looping excitation in lanthanide-doped upconverting nanoparticles enables low-threshold continuous-wave lasing in stand-alone microcavities.
- Angel Fernandez-Bravo
- , Kaiyuan Yao
- & P. James Schuck
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Letter |
A MoTe2-based light-emitting diode and photodetector for silicon photonic integrated circuits
Optical interconnect components based on bilayer MoTe2 p–n junctions can be directly integrated with silicon photonics
- Ya-Qing Bie
- , Gabriele Grosso
- & Pablo Jarillo-Herrero
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Article |
Towards zero-threshold optical gain using charged semiconductor quantum dots
Blocking band-edge absorption of compositionally graded quantum dots with suppressed Auger recombination by pre-existing electrons allows for demonstrating near-zero-threshold optical gain and amplified spontaneous emission at sub-single-exciton pump levels.
- Kaifeng Wu
- , Young-Shin Park
- & Victor I. Klimov
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Article |
Room-temperature continuous-wave lasing from monolayer molybdenum ditelluride integrated with a silicon nanobeam cavity
A silicon nanobeam cavity laser integrated with monolayer molybdenum ditelluride enables room-temperature lasing in the near infrared.
- Yongzhuo Li
- , Jianxing Zhang
- & C. Z. Ning
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Article |
Band-edge engineering for controlled multi-modal nanolasing in plasmonic superlattices
Arrays of nanoparticles grouped into microscale arrays support multiple nanolasing modes that can be tailored by changing the geometry of the superlattice.
- Danqing Wang
- , Ankun Yang
- & Teri W. Odom
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Letter |
Spectral focusing of broadband silver electroluminescence in nanoscopic FRET-LEDs
The demonstration of energy transfer from hotspots of electroluminescent silver nanoparticles to a two-dimensional crystal overlayer of a transition-metal dichalcogenide provides a tunable, sub-diffraction, electrically driven light source.
- Robin P. Puchert
- , Florian Steiner
- & John M. Lupton
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Review Article |
Origin and control of blinking in quantum dots
Semiconductor nanocrystals offer an enormous diversity of device applications that have been potentially limited by intermittent fluorescence intensity or 'blinking' dynamics. However, recent progress in both experiment and theory suggest a more promising outlook.
- Alexander L. Efros
- & David J. Nesbitt
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Article |
Perovskite energy funnels for efficient light-emitting diodes
Light-emitting diodes based on mixed-dimensionality perovskite solids show outstanding radiative properties in the near-infrared region.
- Mingjian Yuan
- , Li Na Quan
- & Edward H. Sargent
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Editorial |
When the dots are joined
We consider the potential of colloidal quantum dot solids for optoelectronic applications.
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Commentary |
What future for quantum dot-based light emitters?
Synthesis of semiconductor colloidal quantum dots by low-cost, solution-based methods has produced an abundance of basic science. Can these materials be transformed to high-performance light emitters to disrupt established photonics technologies, particularly semiconductor lasers?
- Arto Nurmikko
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Article |
A monolithic white laser
A monolithic heterostructure nanosheet composed of a ZnCdSSe multi-segment quaternary alloy can simultaneously emit laser light in the red, green and blue.
- Fan Fan
- , Sunay Turkdogan
- & C. Z. Ning
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Editorial |
No walking away
Leaving the European Union could be detrimental for science and innovation in the United Kingdom.
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Research Highlights |
Our choice from the recent literature
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Letter |
Bright visible light emission from graphene
Electrically biased suspended graphene devices show an intense electroluminescence in the visible range with a tunable emission spectrum.
- Young Duck Kim
- , Hakseong Kim
- & Yun Daniel Park
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Article |
Light-emitting self-assembled peptide nucleic acids exhibit both stacking interactions and Watson–Crick base pairing
Peptide nucleic acids can self-assemble into ordered architectures that are coordinated by both stacking interactions and Watson–Crick base pairing, and exhibit a variety of optical properties.
- Or Berger
- , Lihi Adler-Abramovich
- & Ehud Gazit
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News & Views |
Electrons and holes get closer
Nanowires that exhibit very sharp emission due to the formation of quantum states within them have been used to fabricate low threshold current lasers emitting ultraviolet light.
- Chee-Keong Tan
- & Nelson Tansu
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Letter |
Ultralow-threshold electrically injected AlGaN nanowire ultraviolet lasers on Si operating at low temperature
Anderson localization of light in AlGaN–GaN nanowires is exploited to fabricate ultraviolet laser arrays with a lasing threshold of only a few tens of amperes per centimetre squared at cryogenic temperature.
- K. H. Li
- , X. Liu
- & Z. Mi
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News & Views |
Taken for a spin
A built-in semiconductor/nanomagnet interface acts as a spin filter in a conventional laser to produce circularly polarized emission without the need for external spin-polarized pumping.
- Igor Žutić
- & Paulo E. Faria Junior
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Letter |
Continuous-wave biexciton lasing at room temperature using solution-processed quantum wells
Colloidal quantum wells can be used to achieve continuous-wave-pumped stimulated emission and, if placed in a cavity, lasing.
- Joel Q. Grim
- , Sotirios Christodoulou
- & Iwan Moreels
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Article |
Self-polarized spin-nanolasers
Fe3O4 nanoparticles deposited on top of GaN nanorods produce a spin-up and spin-down imbalance that makes the semiconductor emit coherent spin-polarized light.
- Ju-Ying Chen
- , Tong-Ming Wong
- & Yang-Fang Chen
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Letter |
Bright light-emitting diodes based on organometal halide perovskite
Electroluminescence with relatively high radiance is observed from solution-processed diodes of organometal halide perovskites.
- Zhi-Kuang Tan
- , Reza Saberi Moghaddam
- & Richard H. Friend
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Letter |
Random nanolasing in the Anderson localized regime
Anderson localization of light in photonic-crystal waveguides enables highly efficient, stable and broadband random nanolasing.
- J. Liu
- , P. D. Garcia
- & P. Lodahl
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Letter |
Electrically tunable excitonic light-emitting diodes based on monolayer WSe2 p–n junctions
Bright and electrostatically tunable electroluminescence from monolayer WSe2 p–n junctions is reported.
- Jason S. Ross
- , Philip Klement
- & Xiaodong Xu
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News & Views |
A sense of direction
Lattice surface plasmons enable large-area unidirectional emission of coherent light generated at deep subwavelength scales.
- Jorge Bravo-Abad
- & Francisco J. García-Vidal
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Letter |
Lasing action in strongly coupled plasmonic nanocavity arrays
Two-dimensional arrays of plasmonic nanoparticles coupled with a gain medium can behave as a surface-emitting laser with near-zero group velocity and picosecond dynamics.
- Wei Zhou
- , Montacer Dridi
- & Teri W. Odom
Inelastic electron tunnelling induces anomalous light emission
Nitrides in the spotlight