Plasmon-emitter hybrid nanocavity systems exhibit strong plasmon-exciton interactions at the single-emitter level, showing great potential as testbeds and building blocks for quantum optics and informatics. However, reported experiments involve only one addressable emitting site, which limits their relevance for many fundamental questions and devices involving interactions among emitters. Here we open up this critical degree of freedom by demonstrating selective far-field excitation and detection of two coupled quantum dot emitters in a U-shaped gold nanostructure. The gold nanostructure functions as a nanocavity to enhance emitter interactions and a nanoantenna to make the emitters selectively excitable and detectable. When we selectively excite or detect either emitter, we observe photon emission predominantly from the target emitter with up to 132-fold Purcell-enhanced emission rate, indicating individual addressability and strong plasmon-exciton interactions. Our work represents a step towards a broad class of plasmonic devices that will enable faster, more compact optics, communication and computation.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5924364 | PMC |
| http://dx.doi.org/10.1038/s41467-018-04077-z | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Selective modal excitation in a multimode nanoslit by interference of surface plasmon waves.
Nanoscale Adv
January 2025
School of Electrical Engineering and Computer Science, University of Ottawa Ottawa Ontario K1N 6N5 Canada
Interference of surface plasmons has been widely utilized in optical metrology for applications such as high-precision sensing. In this paper, we introduce a surface plasmon interferometer with the potential to be arranged in arrays for parallel multiplexing applications. The interferometer features two grating couplers that excite surface plasmon polariton (SPP) waves traveling along a gold-air interface before converging at a gold nanoslit where they interfere.
View Article and Find Full Text PDFNumerical dosimetry of specific absorption rate of insects exposed to far-field radiofrequency electromagnetic fields.
Int J Radiat Biol
January 2025
Department of Biocybernetics, Vladimer Chavchanidze Institute of Cybernetics of the Georgian Technical University, Tbilisi, Georgia.
Purpose: This paper reports a study of electromagnetic field (EMF) exposure of several adult insects: a ladybug, a honey bee worker, a wasp, and a mantis at frequencies ranging from 2.5 to 100 GHz. The purpose was to estimate the specific absorption rate (SAR) in insect tissues, including the brain, in order to predict the possible biological effects caused by EMF energy absorption.
View Article and Find Full Text PDFFull-space trifunctional metasurface with independent control of amplitude and phase for circularly polarized waves.
Nanophotonics
November 2024
College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China.
Flexible and diverse manipulation of electromagnetic (EM) waves in half space (reflection or transmission) has facilitated strong aspiration toward full-space wave control. However, it remains challenging to achieve independent amplitude and phase control, which seriously hinder the real-world applications. Herein, an innovative strategy of trifunctional metasurface is proposed to independently and simultaneously manipulate the amplitude and phase of circular polarized waves in full space.
View Article and Find Full Text PDFPlasmonic-nanowire near-field beam analyzer.
Nanophotonics
March 2024
Laboratory of Integrated Opto-Mechanics and Electronics, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
Article Synopsis
- Experimental near-field analysis of output beams from micro/nano-waveguides is crucial for designing nanophotonic devices, yet it hasn’t been demonstrated until now.
- The study introduces a plasmonic-nanowire beam analyzer using a single Au nanowire to scan near-field distributions, achieving a resolution of 190 nm and a collection efficiency of about 47.4%.
- This novel approach enables the first 3D characterization of spatial distributions from a metal nanowire output beam and showcases the ability to analyze complex multimodes in large nanoribbons, indicating potential applications in nanolasers and biosensing.
Multicore fibers are promising structures with specific light propagation properties, which can be managed to benefit several applications in optical communications, fiber lasers and amplifiers, high-resolution imaging, and fiber-based sensors. The current use of multicore fibers in laser technology is mainly focused on in-phase coherent beam combining in far-field regions (out-cavity) using bulk optical elements. However, this approach is challenging in terms of the power scalability of all-fiber lasers (intra-cavity), particularly with using low-gain media, where it is needed to provide mode-coupling (supermode propagation) stability along relatively long lengths.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!