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EACON 2020

EurAsian Conference on Nanophotonics

April 6 – 9, 2020 / Jena, Germany


Chi Chen

Research Center for Applied Sciences, Academia Sinica, Nangang, Taipei, 115, Taiwan

Near Field Spectroscopic Imaging: from Hard to Soft Materials

Scanning near field optical microscopy (SNOM) is a scanning probe technique that combines optics with an atomic force microscopy (AFM) to achieve sub-diffraction limit optical resolution. The tip-sample distance control is very critical and may causes serious sample damage during SNOM operation. This is still a mild issue for “hard” materials, such as transition metal dichalcogenides (TMD). Even though small scratch may happen, the sample would not be shifted by the tip. However, for “soft” materials, such as polymers and lipids, dragging and lifting of the sample are deadly problems to damage both the sample and SNOM tip.

Here we design and build a horizontal-type aperture based SNOM setup (a-SNOM) with superior mechanical stability toward high resolution and non-destructive topographic and optical imaging. We adopt the torsional resonance (TR) mode for the AFM operation to achieve a better force sensitivity and a higher spatial resolution even with the blunt a-SNOM tip. In addition, we developed another homemade horizontal-type SNOM system in an Argon purged glove box for stable SNOM operation and to eliminate possible photoreactions. Finally, a-SNOM imaging of fluorescent dye-labeled lipid domains are successfully achieved without sample damage by our horizontal-type a-SNOM system. In this talk, we will present simultaneous SNOM fluorescence and topographic imaging of TMD heterojunction, self-assembled P3HT nanowires and lipid domains with lateral optical resolution of 60~80 nm.

(Top) Schematic illustration of the cantilever based a-SNOM setup. (Bottom) Comparison of confocal-PL and SNOM-PL imaging of MoS2/WS2 lateral heterojunction.

Further Talks

Andrea Csáki

Microfludic Synthesis of plasmonic Nanoparticles for Sensing Applications

Andrey Turchanin

Controlled growth of transition metal dichalcogenide monolayers for applications in nanoelectronic and nanophotonic devices

Chi Chen

Near Field Spectroscopic Imaging: from Hard to Soft Materials

Chi-How Peng

Cobalt mediated controlled/living radical polymerization: from mechanism understanding to materials application

Chun-Hong Kuo

Bridging Energy and Chemistry via Nanoarchitectonic Engineering at Atomic Scale

Falk Eilenberger

Integration of two-dimensional materials in optical systems for nonlinear optics, sensing, and single photon sources

Frank Setzpfandt

Nonlinear frequency conversion in nanostructured optical systems for application in quantum photonics

Heng-Liang Wu

Controlling the Oxidation State of Cu Electrode and Reaction Intermediates for Electrochemical CO2 Reduction to Ethylene

Kien-Voon Kong

Direct Observation of Reaction Intermediates of Metal-based Therapeutic Agents in Single Living Cell Using TERS

Maria Wächtler

Quantum confined semiconductor nanostructures in light-driven catalysis

Martin Presselt

Supramolecular Control of Optical and Electronical Properties of Two-Dimensional Dye Layers

Po-Chiao Lin

New Environment Sensitive Fluorophores with Color-Tailored Emission: In Vivo Monitoring of Carbonic Anhydrases Expression on Growth of Larval Zebrafish

Shangjr (Felix) Gwo

Plasmonic Metasurface-Enhanced Linear and Nonlinear Processes in Two-Dimensional Semiconductors

Ta-Jen Yen

Empowering Bilayer MoS2 by Engineered Plasmonic Nanostructures for Optoelectronic Applications

Tiow-Gan Ong

Carbodicarbene, Carbogenic Maverick, Not a Moderate!

Volker Deckert

Plasmon Enhanced Probe Spectroscopies – Structural Investigation of Nanoscale Objects

Yi-Tsu Chan

Molecular self-assembly methodology for rational construction of metallosupramolecules with high structural complexity

Yian Tai

Toward a universal polymeric material for electrode buffer layers in organic optoelectronics

Yu-Jung Lu

Controlling Light-matter Interactions at Nanoscale with Plasmonics: From Spontaneous Emission to Lasing