At the level of individual molecules, familiar concepts heat transport no longer apply. When large amounts are transported through a molecule, crucial process in molecular electronic devices, energy is carried by discrete vibrational excitations. We studied self-assembled monolayers long-chain hydrocarbon molecules anchored to gold substrate ultrafast heating with femtosecond laser pulse. reached methyl groups at chain ends, nonlinear coherent spectroscopy technique detected resulting...

Suppression of the nonresonant background in vibrational sum-frequency generation (SFG) broadband multiplex configuration is achieved using a time-asymmetric pulse, created by passing femtosecond pulse through Fabry−Perot étalon, to temporally discriminate between faster and slower resonant contributions. A mixed time frequency domain explanation SFG process presented, spectra with high resolutions degrees suppression are obtained self-assembled alkanethiolate monolayers on Au.

Solid-state quantum emitters are in high demand for emerging technologies such as advanced sensing and information processing. Generally, these not sufficiently bright practical applications, a promising solution consists coupling them to plasmonic nanostructures. Plasmonic nanostructures support broadband modes, making it possible speed up the fluorescence emission room-temperature by several orders of magnitude. However, one has yet achieved lifetime shortening without substantial loss...

Abstract The broadband enhancement of single‑photon emission from nitrogen‐vacancy centers in nanodiamonds coupled to a planar multilayer metamaterial with hyperbolic dispersion is studied experimentally. fabricated as an epitaxial metal/dielectric superlattice consisting CMOS‐compatible ceramics: titanium nitride (TiN) and aluminum scandium (Al x Sc 1‐x N). It demonstrated that employing the results significant collected reduction excited‐state lifetime. Our could have impact on future...

Two-dimensional hexagonal boron nitride (hBN) that hosts bright room-temperature single-photon emitters (SPEs) is a promising material platform for quantum information applications. An important step towards the practical application of hBN on-demand, position-controlled generation SPEs. Several strategies have been reported to achieve deterministic creation However, they either rely on substrate nanopatterning procedure not compatible with integrated photonic devices or utilize radiation...

Quantum emitters coupled to plasmonic nanostructures can act as exceptionally bright sources of single photons, operating at room temperature. Plasmonic mode volumes supported by these be several orders magnitude smaller than the cubic wavelength, which leads dramatically enhanced light–matter interactions and drastically increased photon production rates. However, when increasing light localization further, deeply subwavelength modes may in turn hinder fast outcoupling photons into free...

Abstract The strong electric and magnetic resonances in dielectric subwavelength structures have enabled unique opportunities for efficient manipulation of light–matter interactions. Besides, the dramatic enhancement nonlinear interactions near so‐called bound states continuum (BICs) has recently attracted enormous attention due to potential advancements. However, experimental realizations applications high‐Q factor visible thus far been considerably limited. In this work, interplay dipoles...

Bright, stable, linearly polarized, and high-purity single-photon emitters at room temperature are observed in SiN.

The thermal emission of refractory plasmonic metamaterial -a titanium nitride 1D grating -is studied at high operating temperature (540 °C).By choosing a material, we fabricate gratings with brightness that are emitting mid-infrared radiation centered around 3 µm.We demonstrate experimentally the excitation plasmon-polariton on surface produces well-collimated beam spatial coherence length 32λ (angular divergence 1.8°) which is quasi-monochromatic full width half maximum 70 nm.These...

The recent discovery of room temperature intrinsic single-photon emitters in silicon nitride (SiN) provides the unique opportunity for seamless monolithic integration quantum light sources with well-established SiN photonic platform. In this work, we develop a novel approach to realize planar waveguides made low-autofluorescing and demonstrate emission coupling into waveguide mode. observed from these is found be line numerical simulations. mode confirmed by second-order autocorrelation...

Vibrational sum-frequency generation spectroscopy (SFG) is used for in situ probing of molecular vibrations at interfaces associated with solid-electrolyte interphases (SEI) systems relevant to lithium-ion batteries. SFG interface-selective and can suppress nonresonant signals from metal electrodes. Two were observed: the electrode-SEI interface electrolyte-SEI interface. The SEI was formed on Au or Cu by potential cycling 2.0 V–0.2 V (vs. Li/Li+) ethylene carbonate (EC) LiClO4...

We experimentally demonstrate a broadband enhancement of emission from nitrogen vacancy centers in nanodiamonds. The is achieved by using multilayer metamaterial with hyperbolic dispersion. fabricated as stack alternating gold and alumina layers. Our approach paves the way towards construction efficient single-photon sources planar on-chip devices.

Coherent nanoscale photon sources are of paramount importance to achieving all-optical communication. Several nanolasers smaller than the diffraction limit have been theoretically proposed and experimentally demonstrated using plasmonic cavities confine optical fields. Such compact exhibit a strong Purcell effect, thereby enhancing spontaneous emission, which feeds into lasing modes. However, most reported so far employed relatively narrowband resonant nanostructures therefore had restricted...

The potential-dependent (2×2)-3CO→(√19×√19)R23.4°-13CO adlayer phase transition on Pt(111) with 0.1M H2SO4 electrolyte was studied using femtosecond broadband multiplex sum frequency generation (SFG) spectroscopy combined linear scan voltammetry. Across the boundary SFG atop intensity jumps, and at same time spectrum of threefold CO sites is transformed into a bridge site small decrease in integrated intensity. jump three fold-to-bridge drop are noticeably different from what would be...

Diamond color centers have been widely studied in the field of quantum optics. The negatively charged silicon vacancy (SiV

Plasmonic color printing with semicontinuous metal films is a lithography-free and environment-friendly method for generating nonfading bright colors. Such are comprised of islands, nanoparticles their clusters various dimensions, which resonate at different wavelengths upon external light illumination, depending on the size shape local particle structures. To experimentally realize systems that were optimized achieving broad range increased stability, silver deposited metallic (Ag) mirror...

Abstract Silicon nitride (SiN) is a key material for quantum photonics due to its wide transparency window, high refractive index, low optical losses, and semiconductor foundry compatibility. We study the formation of single-photon emitters in SiN films grown by plasma-enhanced chemical vapor deposition (PECVD), exploring their photophysical properties dependence on growth conditions. Emitters were observed across entire range nitrogen-to-silicon precursor ratios, from silicon-rich...

Femtosecond laser-driven approximately 1 GPa shock waves are used to compress monolayers of hydrocarbon chains. Vibrational sum-frequency generation spectroscopy probes the orientation terminal methyl groups. With an odd number (15) carbon atoms, compression is elastic process that causes groups tilt. even (18) viscoelastic, creating single and double gauche defects. When unloads, defects remain while relax in 30 ps single-defect states with more upright

Plasmonic resonances in metallic nanostructures have been shown to drastically enhance local electromagnetic fields, and thereby increase the efficiency of nonlinear optical phenomena, such as second harmonic generation (SHG). While it has experimentally observed that enhanced fields can significantly boost SHG, date proved difficult probe electrical magnetic resonance one same nanostructure. This however is necessary directly compare relative contributions components SHG enhancement. In...

Nitrogen-vacancy centers in diamond allow for coherent spin-state manipulation at room temperature, which could bring dramatic advances to nanoscale sensing and quantum information technology. We introduce a method the optical measurement of spin contrast dense nitrogen-vacancy (NV) ensembles. This brings insight into interplay between fluorescence lifetime. show that improving readout sensitivity NV ensembles, one should aim modifying far-field radiation pattern rather than enhancing emission rate.

The integration of solid-state single-photon sources with foundry-compatible photonic platforms is crucial for practical and scalable quantum applications. This study explores aluminum nitride (AlN) as a material properties highly suitable integrated on-chip photonics the ability to host defect-center related emitters. We have conducted comprehensive analysis creation emitters in AlN, utilizing heavy ion irradiation thermal annealing techniques. Subsequently, we performed detailed their...

Laser-driven ∼1 GPa shock waves are used to dynamically compress self-assembled monolayers (SAMs) consisting of octadecanethiol (ODT) on Au and Ag, pentanedecanethiol (PDT) benzyl mercaptan (BMT) Au. The SAM response <4 ps loading ∼25 unloading is monitored by vibrational sum-frequency generation spectroscopy (SFG), which sensitive the instantaneous tilt angle terminal group relative surface normal. Arrival front causes SFG signal loss in all SAMs with a material time constant <3.5 ps....