Exciton lifetime of quantum dots under hydrostatic pressure tuned scattering field Ag nanoparticles

In the past few decades, studies of exciton emissions coupled with metal nanoparticles have mainly focused on enhancing radiation and reducing lifetime by near-field coupling interactions between excitons nanoparticles. Only in recent years has plasmon-field-induced to extend (inhibition emission) been reported. Experimentally, for observing a long-lifetime state it needs satisfy condition <inline-formula><tex-math id="M8">\begin{document}$kz\sim1$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="24-20221344_M8.jpg"/><graphic xlink:href="24-20221344_M8.png"/></alternatives></inline-formula>, instead id="M9">\begin{document}$ kz\ll 1 $\end{document}</tex-math><alternatives><graphic xlink:href="24-20221344_M9.jpg"/><graphic xlink:href="24-20221344_M9.png"/></alternatives></inline-formula>, where id="M10">\begin{document}$k=2{\pi }n/\lambda$\end{document}</tex-math><alternatives><graphic xlink:href="24-20221344_M10.jpg"/><graphic xlink:href="24-20221344_M10.png"/></alternatives></inline-formula> is wavevector, id="M11">\begin{document}$ n xlink:href="24-20221344_M11.jpg"/><graphic xlink:href="24-20221344_M11.png"/></alternatives></inline-formula> refractive index, id="M12">\begin{document}$ \lambda xlink:href="24-20221344_M12.jpg"/><graphic xlink:href="24-20221344_M12.png"/></alternatives></inline-formula> wavelength, id="M13">\begin{document}$ z xlink:href="24-20221344_M13.jpg"/><graphic xlink:href="24-20221344_M13.png"/></alternatives></inline-formula> separation distance emitter nanoparticle. Thus, this paper, we tune emission wavelength applying hydrostatic pressure achieve id="M14">\begin{document}$kz\sim1$\end{document}</tex-math><alternatives><graphic xlink:href="24-20221344_M14.jpg"/><graphic xlink:href="24-20221344_M14.png"/></alternatives></inline-formula> order detail investigate The studied InAs/GaAs quantum dot (QD) sample grown molecular beam epitaxy (001) semi-insulating GaAs substrate. After AlAs sacrificial layer etched hydrofluoric acid, QD film transferred onto an Si substrate covered Ag Then placed diamond anvil cell device combined piezoelectric ceramic. case can measure photoluminescence time-resolved spectra under different pressures. It found that observed longest id="M15">\begin{document}$(120\pm 4)\times 10~\rm{n}\rm{s}$\end{document}</tex-math><alternatives><graphic xlink:href="24-20221344_M15.jpg"/><graphic xlink:href="24-20221344_M15.png"/></alternatives></inline-formula> at id="M16">\begin{document}$ 1.38\;\rm{G}\rm{P}\rm{a} xlink:href="24-20221344_M16.jpg"/><graphic xlink:href="24-20221344_M16.png"/></alternatives></inline-formula>, corresponding id="M17">\begin{document}$ 797.49\;\rm{n}\rm{m} xlink:href="24-20221344_M17.jpg"/><graphic xlink:href="24-20221344_M17.png"/></alternatives></inline-formula><i>,</i> which about id="M18">\begin{document}$ 1200 xlink:href="24-20221344_M18.jpg"/><graphic xlink:href="24-20221344_M18.png"/></alternatives></inline-formula> times longer than id="M19">\begin{document}$\sim 1\;\rm{n}\rm{s} xlink:href="24-20221344_M19.jpg"/><graphic xlink:href="24-20221344_M19.png"/></alternatives></inline-formula> QDs without influence experimental results be understood based destructive interference field scattering This model proposes convenient way increase dipoles large scale, expected applied information processing, optoelectronic applications, fundamental physics researches such as Bose-Einstein condensates.