当前位置: X-MOL 学术ACS Appl. Mater. Interfaces › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Extrinsic Effects on the Optical Properties of Surface Color Defects Generated in Hexagonal Boron Nitride Nanosheets
ACS Applied Materials & Interfaces ( IF 9.5 ) Pub Date : 2021-09-14 , DOI: 10.1021/acsami.1c11060
Marie Krečmarová 1 , Rodolfo Canet-Albiach 1 , Hamid Pashaei-Adl 1 , Setatira Gorji 1 , Guillermo Muñoz-Matutano 1 , Miloš Nesládek 2 , Juan P Martínez-Pastor 1 , Juan F Sánchez-Royo 1
Affiliation  

Hexagonal boron nitride (hBN) is a wide-band gap van der Waals material able to host light-emitting centers behaving as single photon sources. Here, we report the generation of color defects in hBN nanosheets dispersed on different kinds of substrates by thermal treatment processes. The optical properties of these defects have been studied using microspectroscopy techniques and far-field simulations of their light emission. Using these techniques, we have found that subsequent ozone treatments of the deposited hBN nanosheets improve the optical emission properties of created defects, as revealed by their zero-phonon linewidth narrowing and reduction of background emission. Microlocalized color defects deposited on dielectric substrates show bright (≈1 MHz) and stable room-temperature light emission with zero-phonon line peak energy varying from 1.56 to 2.27 eV, being the most probable value 2.16 eV. In addition to this, we have observed a substrate dependence of the optical performance of the generated color defects. The energy range of the emitters prepared on gold substrates is strongly reduced, as compared to that observed in dielectric substrates or even alumina. We attribute this effect to the quenching of low-energy color defects (these of energies lower than 1.9 eV) when gold substrates are used, which reveals the surface nature of the defects created in hBN nanosheets. Results described here are important for future quantum light experiments and their integration in photonic chips.

中文翻译:

六方氮化硼纳米片表面颜色缺陷对光学性能的外在影响

六方氮化硼 (hBN) 是一种宽带隙范德华材料,能够承载作为单光子源的发光中心。在这里,我们报告了通过热处理工艺分散在不同类型基材上的 hBN 纳米片中颜色缺陷的产生。已经使用显微光谱技术和它们的光发射的远场模拟研究了这些缺陷的光学特性。使用这些技术,我们发现沉积的 hBN 纳米片的后续臭氧处理改善了所产生缺陷的光发射特性,正如它们的零声子线宽变窄和背景发射的减少所揭示的那样。沉积在电介质基板上的微局部颜色缺陷显示出明亮 (≈1 MHz) 和稳定的室温光发射,零声子线峰值能量从 1 开始变化。56 到 2.27 eV,是最可能的值 2.16 eV。除此之外,我们还观察到所产生的颜色缺陷的光学性能对基板的依赖性。与在介电基板或什至氧化铝中观察到的相比,在金基板上制备的发射器的能量范围大大降低。我们将这种效应归因于使用金基板时低能颜色缺陷(这些能量低于 1.9 eV)的淬灭,这揭示了 hBN 纳米片中产生的缺陷的表面性质。此处描述的结果对于未来的量子光实验及其在光子芯片中的集成非常重要。与在介电基板或什至氧化铝中观察到的相比,在金基板上制备的发射器的能量范围大大降低。我们将这种效应归因于使用金基板时低能颜色缺陷(这些能量低于 1.9 eV)的淬灭,这揭示了 hBN 纳米片中产生的缺陷的表面性质。此处描述的结果对于未来的量子光实验及其在光子芯片中的集成非常重要。与在介电基板或什至氧化铝中观察到的相比,在金基板上制备的发射器的能量范围大大降低。我们将这种效应归因于使用金基板时低能颜色缺陷(这些能量低于 1.9 eV)的淬灭,这揭示了 hBN 纳米片中产生的缺陷的表面性质。此处描述的结果对于未来的量子光实验及其在光子芯片中的集成非常重要。
更新日期:2021-09-29
down
wechat
bug