Nanoscale resolved mapping of the dipole emission of hBN color centers with a scattering-type scanning near-field optical microscope.

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Tác giả: Janne O Becker, Johannes Binder, Aleksandra K Dąbrowska, Rainer Hillenbrand, Korbinian Kaltenecker, Annika Klein-Hitpass, Katarzyna Ludwiczak, Iris Niehues, Philippe Roelli, Robert Schmidt, Martin Schnell, Piotr Tatarczak, Daniel Wigger, Andrzej Wysmołek

Ngôn ngữ: eng

Ký hiệu phân loại: 146 Naturalism and related systems and doctrines

Thông tin xuất bản: Germany : Nanophotonics (Berlin, Germany) , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 209769

Color centers in hexagonal boron nitride (hBN) are promising candidates as quantum light sources for future technologies. In this work, we utilize a scattering-type near-field optical microscope (s-SNOM) to study the photoluminescence (PL) emission characteristics of such quantum emitters in metalorganic vapor phase epitaxy grown hBN. On the one hand, we demonstrate direct near-field optical excitation and emission through interaction with the nanofocus of the tip resulting in a subdiffraction limited tip-enhanced PL hotspot. On the other hand, we show that indirect excitation and emission via scattering from the tip significantly increases the recorded PL intensity. This demonstrates that the tip-assisted PL (TAPL) process efficiently guides the generated light to the detector. We apply the TAPL method to map the in-plane dipole orientations of the hBN color centers on the nanoscale. This work promotes the widely available s-SNOM approach to applications in the quantum domain including characterization and optical control.
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