We present a direct measurement of short-wavelength plasmons focused into a sub-100 nm spot in homogeneous (translation invariant) 2D space. The short-wavelength (SW) surface plasmon polaritons (SPP) are achieved in metal-insulator-insulator (MII) platform consisting of silver, silicon nitride, and air. This platform is homogeneous in two spatial directions and supports SPP at wavelength more than two times shorter than that in free space yet interacts with the outer world through the evanescent tail in air. We use an apertureless (scattering) near-field scanning optical microscope (NSOM) to map directly the amplitude and phase of these SW-SPP and show they can be focused to under 70 nm without structurally assisted confinement such as nanoantennas or nanofocusing. This, along with the use of visible light at 532 nm which is suitable for optical microscopy, can open new directions in direct biological and medical imaging at the sub-100 nm resolution regime.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/nl502080n | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Bioarchitectonic Nanophotonics by Replication and Systolic Miniaturization of Natural Forms.
Biomimetics (Basel)
August 2024
Photonics Nanotechnology Research Laboratory-PNRL, Department of Materials Science, University of Patras, 26504 Patras, Greece.
The mimesis of biological mechanisms by artificial devices constitutes the modern, rapidly expanding, multidisciplinary biomimetics sector. In the broader bioinspiration perspective, however, bioarchitectures may perform independent functions without necessarily mimicking their biological generators. In this paper, we explore such notions and demonstrate three-dimensional photonics by the exact replication of insect organs using ultra-porous silica aerogels.
View Article and Find Full Text PDFSub-100 nm carriers by template polymerization for drug delivery applications.
Nanoscale Horiz
April 2024
Department of Pediatrics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
Size-controlled drug delivery systems (DDSs) have gained significant attention in the field of pharmaceutical sciences due to their potential to enhance drug efficacy, minimize side effects, and improve patient compliance. This review provides a concise overview of the preparation method, advancements, and applications of size-controlled drug delivery systems focusing on the sub-100 nm size DDSs. The importance of tailoring the size for achieving therapeutic goals is briefly mentioned.
View Article and Find Full Text PDFDrift of Schottky Barrier Height in Phase Change Materials.
ACS Nano
March 2024
Viterbi Faculty of Electrical & Computer Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Phase-change memory (PCM) devices have great potential as multilevel memory cells and artificial synapses for neuromorphic computing hardware. However, their practical use is hampered by resistance drift, a phenomenon commonly attributed to structural relaxation or electronic mechanisms primarily in the context of bulk effects. In this study, we reevaluate the electrical manifestation of resistance drift in sub-100 nm GeSbTe (GST) PCM devices, focusing on the contributions of bulk vs interface effects.
View Article and Find Full Text PDFActive Solid-State Nanopores: Self-Driven Flows/Chaos at the Liquid-Gas Nanofluidic Interface.
Langmuir
December 2023
International Center for Nanodevices, INCeNSE-TBI, Indian Institute of Science Campus, Bangalore 560 012, Karnataka, India.
Here, we present a comprehensive study of self-driven flow dynamics at the liquid-gas interface within nanofluidic pores in the absence of external driving forces. The investigation focuses on the Rayleigh-Taylor instability phenomena that occur in sub-100 nm scale fluidic pores interfacing between 2 μm scale water and air reservoir. We obtain a flow velocity equation, and we validate it using simulations, concentrating on the mass transfer efficiency of these flow structures.
View Article and Find Full Text PDFLong-Term Performance of Magnetic Force Microscopy Tips Grown by Focused Electron Beam Induced Deposition.
Sensors (Basel)
March 2023
Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
High-resolution micro- and nanostructures can be grown using Focused Electron Beam Induced Deposition (FEBID), a direct-write, resist-free nanolithography technology which allows additive patterning, typically with sub-100 nm lateral resolution, and down to 10 nm in optimal conditions. This technique has been used to grow magnetic tips for use in Magnetic Force Microscopy (MFM). Due to their high aspect ratio and good magnetic behavior, these FEBID magnetic tips provide several advantages over commercial magnetic tips when used for simultaneous topographical and magnetic measurements.
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!