Dhawan Amit R, Nasilowski Michel, Wang Zhiming, Dubertret Benoît, Maître Agnès
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
Sorbonne Universités, UPMC Univ Paris 06, UMR 7588, Institut de NanoSciences de Paris (INSP), Paris, F-75005, France.
Adv Mater. 2022 Mar;34(11):e2108120. doi: 10.1002/adma.202108120. Epub 2022 Jan 28.
Single-emitter plasmonic patch antennas are room-temperature deterministic single-photon sources, which exhibit highly accelerated and directed single-photon emission. However, for efficient operation these structures require 3D nanoscale deterministic control of emitter positioning within the device, which is a demanding task, especially when emitter damage during fabrication is a major concern. To overcome this limitation, the deterministic room-temperature in situ optical lithography protocol uses spatially modulated light to position a plasmonic structure nondestructively on any selected single-emitter with 3D nanoscale control. Herein, the emission statistics of such plasmonic antennas that embed a deterministically positioned single colloidal CdSe/CdS quantum dot, which highlight acceleration and brightness of emission, are analyzed. It is demonstrated that the presented antenna induces a 1000-fold effective increase in the absorption cross-section, and, under high pumping, these antennas show nonlinearly enhanced emission.
单发射体等离子体贴片天线是室温确定性单光子源，其表现出高度加速和定向的单光子发射。然而，为了高效运行，这些结构需要对发射体在器件内的定位进行三维纳米级确定性控制，这是一项艰巨的任务，尤其是在制造过程中发射体损坏是一个主要问题时。为了克服这一限制，确定性室温原位光刻协议使用空间调制光，以三维纳米级控制将等离子体结构无损地定位在任何选定的单发射体上。在此，分析了嵌入确定性定位的单个胶体CdSe/CdS量子点的此类等离子体天线的发射统计数据，这些数据突出了发射的加速和亮度。结果表明，所展示的天线使吸收截面有效增加了1000倍，并且在高泵浦条件下，这些天线显示出非线性增强发射。
