Abstract High-speed light emitters integrated on silicon chips can enable novel architectures for silicon-based optoelectronics, such as on-chip optical interconnects, and photonics. However, conventional sources based compound semiconductors face major challenges their integration with a platform because of difficulty direct growth substrate. Here we report ultra-high-speed (100-ps response time), highly graphene-based on-silicon-chip blackbody in the near-infrared region including...

This paper reports the first demonstration of current-induced magnetization switching using an ordinary insulator.

The integration of high-speed light emitters on silicon chips is an important issue that must be resolved in order to realize on-chip or interchip optical interconnects. Here, we demonstrate the first electrically driven ultrafast carbon nanotube (CNT) emitter based blackbody radiation with a response speed (1-10 Gbps) more than 10(6) times higher conventional incandescent and either comparable light-emitting diodes laser diodes. This explained by extremely fast temperature CNT film, which...

Graphene is a promising material for producing optical devices because of its optical, electronic, thermal, and mechanical properties. Here, we demonstrated on-chip switches equipped with graphene heater, which exhibited high modulation speed efficiency. We designed the optimal structure switch an add/drop-type racetrack resonator two output waveguides (the through drop ports) by electromagnetic field calculation. fabricated in microheater was directly placed on observed operation utilizing...

Relative values of differential cross sections (DCS) are measured by the crossed-beam method. Two cylindrical-mirror energy analysers employed. One them is moved to detect scattered electrons at every angle, and other fixed an angle monitor elastic scattering events. The effects target gas distributions in a molecular beam flowing out from multicapillary array taken account correct relative values. DCS also for water molecules helium atoms using chamber. On basis absolute He Jansen et al....

We have fabricated a new device for applying uniaxial strain to an individual suspended SWNT, and the form photoluminescence (PL) of SWNT under stretching are investigated. The processes deformation break directly observed by scanning electron microscopy (SEM). From PL measurements, emission energy shifts due band gap change measured elastic strain. behaviors can be related SEM. Moreover, intensity reduction is also just before breaking.

We investigated the photoluminescence of individual air-suspended single-walled carbon nanotubes (SWNTs) from 6 to 300 K. Time-resolved and antibunching measurements over telecommunication wavelength range were performed using a superconducting single-photon detector. detected moderate temperature independent behavior whole studied. To investigate exciton dynamics, which is responsible for behavior, we measured excitation-power dependence spectra lifetime decay curves. These suggested an...

The electrochemically reversible photoluminescence of sulforhodamine B (SRB) anions is demonstrated based on the redox Fe in a metallo-supramolecular polymer.

The magnetic properties of different-sized Pt nanoparticles coated by alkanethiol molecules with different carbon chain lengths (1-octadecanethiol, 1-dodecanthiol, and 1-octanethiol) were systematically studied means measurement, x-ray circular dichroism (XMCD), absorption near-edge structure (XANES), electron spin resonance (ESR). Furthermore, azobenzene-derivatized thiol coating was performed to detect the effect on characteristics geometrical transformation between cis trans states...

Fabrication of a 2D square lattice array intentionally tapered micro-/nano-silicon pillars by metal-assisted chemical etching (MACE) silicon wafers is reported. The are rod shaped with the cross-sections in range 0.2 × 0.2-0.9 0.9 μm2 and heights 3-7 μm. spacing between was controlled 0.5 3.0 While after MACE had high aspect ratio ∼1:5, subsequent anisotropic wet potassium hydroxide solution led to 80°-89.5° tapers smooth sidewalls. resulting taper angle showed relation geometry pillar...

In nature, biological macromolecules control the growth of inorganic crystals under mild conditions in aqueous media. Inspired by biomineralization, biomimetic approaches have been studied for media using organic molecules and polymers. The were not applied to nonaqueous systems development functional materials. Here, we Morphology orientation 10,12-pentacosadiynoic acid (PCDA) crystals, a diacetylene derivative, controlled with additive polymers surface-modified substrates. oriented PCDA...

Nitrogen radicals were irradiated on the (0001) and surfaces of ZnO single crystals, stability states N ions investigated by Auger electron spectroscopy (AES) X-ray photoelectron (XPS). On surface, many replaced O during annealing in oxygen gas or vacuum after nitrogen treatment. However, few surface. These results suggest that doping surface is more effective than

Short-wavelength electroluminescence (EL) emission is observed from unipolar and ambipolar carbon nanotube field-effect transistors (CNFETs) under high bias voltage. EL measurements were carried out with an unsuspended single-walled (SWNT) in vacuum to prevent the oxidation damage induced by current heating. voltage obtained because of Schottky barrier reduction electric field increase a SWNT. The simultaneous transport spectra revealed excitation mechanism impact or electron hole injection...

We report electrically driven narrow-linewidth blackbody emission from carbon-nanotube with Fabry-Perot microcavities. fabricated two types of devices microcavities consisting either gold mirrors or distributed Bragg reflectors (DBR). Gold-mirror microcavity exhibit narrowed full-width at half-maximum ∼50 nm in contrast to the broad normal spectrum. The spectra these can be explained by theoretical calculations accounting for temperature-dependent intrinsic and transmittance spectrum...

Saturable absorption is a key technology for shaping the waveform of light such as in passive mode-locking. The combination high-Q optical microcavities with saturable absorber allows stable lasing and soliton formation. This work describes by carbon nanotubes (CNTs) on silica microtoroids. CNTs, which are absorbers capable fast response time broadband absorption, were grown microtoroids chemical vapor deposition (CVD). Raman spectroscopy revealed that CNTs good quality (G/D ratio ∼ 7) about...

Superconducting nanowires have attracted considerable attention due to their unique quantum-mechanical properties, as well potential next-generation quantum nanodevices, such single-photon detectors, phase-slip (PS) qubits, and other hybrid structures. In this study, we present the results of one-dimensional (1D) superconductivity in fabricated by coating suspended carbon nanotubes with a superconducting thin niobium nitride (NbN) film. resistance-temperature characteristic curves, hallmarks...

The new processes of current flow through electrodes at carbon nanotube (CNT)-electrode junctions were carried out to change the contact resistance CNT conductors and tunnel barriers quantum dots. When process was applied with Au/Ti deposited on multiwall CNTs (MWNTs), markedly decreased. This is caused by formation titanium carbide (TiC) electrode-nanotube junction due strong interaction between Ti nanotubes. useful for obtaining conductor low resistance. Meanwhile, when single-wall (SWNT)...

Abstract A Ru(II)-based metallosupramolecular polymer RuL1 was synthesized by complexation of a Ru(II) salt and phenylenebis(terpyridine). The long chains were observed on Si substrate using atomic force microscopy. Interestingly, film showed luminescence from the 3MLCT state complex moieties at room temperature excitation resonant wavelength 1MLCT absorption. In addition, we fabricated solid-state device with achieved reversible switching applying voltages (3 −3 V) between indium tin oxide...

IR analyses such as Fourier transform infrared spectroscopy (FTIR) are widely used in many fields; however, the performance of FTIR is limited by slow speed (∼10 Hz), large footprint (∼ millimeter), and glass bulb structure light sources. Herein, we present imaging based on multilayer-graphene microemitters, which have distinct features: a planar structure, bright intensity, small (sub-μm2), high modulation >50 kHz. We developed an analysis system microemitter performed absorption...

A polarized light source covering a wide wavelength range is required in applications across diverse fields, including optical communication, photonics, spectroscopy, and imaging. For practical applications, high degrees of polarization thermal performance are needed to ensure the stability radiation intensity low energy consumption. Here, we achieved efficient emission highly broadband from suspended aligned carbon nanotube film. The anisotropic nature film, combined with suspension, led...

Controlling the generation of spin-orbit torque (SOT) with an electric field is important for spintronic applications in digital memory and magnetic sensors, but heavy metals typically used as SOT sources, insensitivity bulk carrier density to makes generating difficult. This study demonstrates that creating ultrathin film gold can be managed effectively by ionic-liquid gating, which enables tuning SOT-generation efficiency a factor two gate voltage just \ifmmode\pm\else\textpm\fi{}1 V. The...

Microsized light sources with polarized or broadband emission can be used for a variety of applications. However, the system directly generating and broad-spectrum without using polarizers has not been established. Here, we found that nano-device densely packed highly aligned carbon nanotube (CNT) films on silicon chips emit broad spectrum. We observed spatial patterns are dependent angle between electrical bias CNT alignment direction, which caused only by large thermal conductivity...