Strain Modulation of Si Vacancy Emission from SiC Micro- and Nanoparticles.
Strain Modulation of Si Vacancy Emission from SiC Micro- and Nanoparticles.
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SiC微纳米颗粒中Si空位发射的应变调制。
DOI:
10.1021/acs.nanolett.0c03472
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发表时间:
2020-12-09
期刊:
影响因子:
10.8
通讯作者:
Vines L
中科院分区:
文献类型:
--
作者:
Vásquez GC;Bathen ME;Galeckas A;Bazioti C;Johansen KM;Maestre D;Cremades A;Prytz Ø;Moe AM;Kuznetsov AY;Vines L
Single-photon emitting point defects in semiconductors have emerged as strong candidates for future quantum technology devices. In the present work, we exploit crystalline particles to investigate relevant defect localizations, emission shifting, and waveguiding. Specifically, emission from 6H-SiC micro- and nanoparticles ranging from 100 nm to 5 μm in size is collected using cathodoluminescence (CL), and we monitor signals attributed to the Si vacancy (VSi) as a function of its location. Clear shifts in the emission wavelength are found for emitters localized in the particle center and at the edges. By comparing spatial CL maps with strain analysis carried out in transmission electron microscopy, we attribute the emission shifts to compressive strain of 2–3% along the particle a-direction. Thus, embedding VSi qubit defects within SiC nanoparticles offers an interesting and versatile opportunity to tune single-photon emission energies while simultaneously ensuring ease of addressability via a self-assembled SiC nanoparticle matrix.
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