A single quantum dot (QD) strongly coupled with a plasmonic nanoparticle yields a promising qubit for scalable solidstate quantum information processing at room temperature. However, realizing such a strong coupling remains challenging due to the difficulty of spatial overlap of the QD excitons with the plasmonic electric fields (EFs). Here, by using a transmission electron microscope we demonstrate for the first time that this overlap can be realized by integrating a deterministic single QD with a single Au nanorod. When a wedge nanogap cavity consisting of them and the substrate is constructed, the plasmonic EFs can be more effectively "dragged" and highly confined in the QD's nanoshell where the excitons mainly reside. With these advantages, we observed the largest spectral Rabi splitting (reported so far) of ∼234 meV for a single QD strong coupling with plasmons. Our work opens a pathway to the massive construction of roomtemperature strong coupling solid qubits.
Chlorosilane-based self-assembled monolayers (SAMs), including octyltrichlorosilane (C8-OTS), (tridecafluoro-1,1,2,2-tetrahydrooctyl) trichlorosilane (FOTS) and dimethyldichlorosilane (DDMS), are applied on various substrates via a vapor-phase coating process for thermal stability analysis. Si(100) wafer dies and commercial vaporphase-deposited nanoparticle films are utilized as substrates to characterize the thermal stability enhancement. Atomic-force microscopy data prove that the vapor-based deposition technique results in a smooth surface with few aggregates. Contact angle goniometry data show that DDMS-based SAMs function effectively as the final protection layer for various substrates and these results are confirmed by thermogravimetric analysis of SAMs on the fumed silica supports. Quantitative analysis from X-ray photoelectron spectroscopy data shows that polymerized DDMS may exist on various surfaces and can contribute to the stable silane structures for DDMS. These test results yield improved understanding of thermal behavior of chlorosilane SAMs under high temperature and indicate that DDMS films are viable options for devices requiring low adhesion and high thermal stability.
This work investigates the criticality of the dilute-to-dense transition
in an inclined quasi-2D granular channel flow. At fixed inflow rate
Q0 and exit
opening size d,
the waiting time t
before the transition occurs after a dilute flow is initiated at
t = 0 is recorded.
The histogram f(t)
of the number of times counted that the transition occurs at a time
t is plotted as a
function of t for each
d. It is found that the
probability function C(t)
for the flow remaining dilute at a waiting time
t
decays exponentially, and its characteristic time
α−1(d) can be fitted well
to a power law a(dc−d)−γ
with dc
the critical opening size beyond which the transition will never occur.
Transient in-line holographic imaging system is optimized for recording the holograms of detonation loaded microjet particles with a velocity higher than 5 km/s. Then an adaptive multithreshold image segmentation method is developed to improve the measurement precision of particle size and number. The measured size of ejected particles is from several microns to over ten microns, and the processing errors of particle number and size are less than 5% and 15%, respectively. The statistical results also show that the size, number, and velocity of microjet particles vary depending on the surface conditions of the Al metal debris. Compared with a uniform metal sample, the nonuniform metal sample with cone-shaped hole exhibits more ejected particles, larger particle size, and higher velocity.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.