We demonstrated sub-wavelength (~111 nm diameter) single nanowire (NW) continuous wave (CW) lasers on silicon photonic crystal in the telecom-band with direct modulation at 10 Gb/s by optical pumping cryogenic temperatures. To estimate small signal response and pseudo-random bit sequence (PRBS) of our CW lasers, we employed a new detection technique that employs superconducting photon detector time-correlated counting module. The results showed NW laser was unambiguously modulated above an...

We report the successful demonstration of all-optical switching using a subwavelength InP/InAsP nanowire integrated in silicon photonic crystal at telecommunication wavelengths. In this work, we employed two different hybrid cavities based on an air-trench crystals. These have advantages both material functionality III–V and low propagation loss waveguide. The induced line-defect cavity shows Q-factor 25000, higher than systems previously demonstrated. time is 150 ps, which among fastest...

C-Glycosides are metabolically stable mimics of natural O-glycosides and expected to be useful tools for investigation the biological functions glycans. Here, we describe synthesis a series aryl vinyl C-glycosides by stereoinvertive sp3–sp2 cross-coupling reactions 2-deoxyglycosyl boronic acid derivatives with or halide, mediated photoredox/nickel dual catalytic system. Hydrogenation afforded C-linked 2′-deoxydisaccharide analogues.

The self-repair of an ordered pattern nanometer dimensions based on the self-compensation properties anodic porous alumina is demonstrated. In a pretextured formed Al using nanoindentation process with array convexes, deficiency sites were found to be compensated automatically during anodization. Combining pore configuration preparation replica structure allowed us develop which has capability self-repairing imperfections in starting pattern. It was confirmed that deficiencies could repaired...

Nanochannel arrays with an ideally ordered hole configuration a 63 nm periodicity and 15–40 diameter were fabricated using anodization of the pretextured Al in sulfuric acid solution. The SiC mold array convexes, which was prepared by electron beam lithography, used for nanoindentation Al. convexes adjusted to self-organized obtained concaves on initiated development during generated period. Under appropriate conditions, anodic porous alumina aspect ratio over 20 obtained.

A mosaic consisting of pillars two kinds metal , gold and nickel, has been deposited on porous alumina substrates. sequence barrier layer application, selective penetration the barrier, deposition can be manipulated to control arrangement density composites. An array Au (brighter) Ni cylinders is shown in Figure.

Two-dimensional (2D) photonic crystals were fabricated using anodic porous alumina with a highly ordered air-hole array of triangular lattice high aspect ratio over 200. The transmission properties the obtained in matrix exhibited stop band spectrum which corresponds to gap 2D crystals.

The eye diagram of a 100 Gbit/s optical signal has been successfully measured using sum-frequency-generation sampling, which uses an organic crystal (AANP: 2-adamantylamino-5-nitropyridine) with high nonlinearity to improve the signal-to-noise ratio waveform. Using this method, > 17 dB is obtained at peak power 270 mW.

Here we report the successful demonstration of lasing oscillation in a subwavelength semiconductor nanowire (100 nm diameter) at telecom wavelengths. Although is too thin to configure an efficient optical cavity by itself, have combined with Si photonic crystal form nanowire-induced hybrid nanocavity. This unique configuration enables us realize nanowire-based nanolaser on platform. Our systematic study, which included L–L characteristics, emission wavelength, line width, lifetime, and...

We report on the fabrication, nanomanipulation, and optical properties of ZnO-nanowire-induced nanocavities in grooved SiN photonic crystals. show that subwavelength ZnO nanowires supporting intrinsically no Fabry–Pérot mode violet near-ultraviolet range can induce confinement when introduced a two-dimensional crystal waveguide. Despite fabrication challenges arising at such short wavelengths, this hybrid approach leads to fundamental nanocavity modes with resolution-limited quality factors...

Using finite-difference time-domain simulation, we show that ultrahigh-Q nanocavities can be obtained through the manipulation of a single semiconductor nanowire (NW) inside slot in line defect two-dimensional photonic crystal. By controlling design and its lattice parameters crystal, have achieved quality factor Q larger than 106 mode volume Vc smaller 0.11 μm3 (1.25 cubic wavelength NW) for cavity peak telecommunication band. This is useful realizing position-controlled Here, also discuss...

High-Q nanocavities have been extensively studied recently because they are considered key elements in low-power photonic devices and integrated circuits. Here we demonstrate that ultrahigh-Q (>10(6)) can be created by employing scanning probe lithography on a prepatterned line defect silicon crystal. This is the first realization of postprocess modification crystals. With this method, form an nanocavity with controllable cavity parameters at arbitrary position along defect. Furthermore,...

We have open up new nonlinear-laser potential in polar C15H19N3O2 (AANP) single crystal. At room temperature under one-micron picosecond laser excitation high-order stimulated Raman scattering (SRS) and self-sum-frequency generation effects this organic material were observed. All their registered lasing components identified put relation with the SRS-active vibration modes (ωSRS ≈1280 cm-1). The investigated crystal is classified a as promising χ(2)+χ(3) medium for laser-frequency...

Multiple patterning of a Si substrate is performed by nanoelectrode lithography, which transfers the pattern an electrochemical reaction. By repeating process with line-and-space-pattern nanoelectrode, checked successfully fabricated. The fabricated used as etching mask to wet etch substrate. has two possible results. With one, transferred additionally acts mask. other, only overlapping area can act These results derive from flexibility lithography.

Abstract This article describes our recent progress on the development of organic emissive materials and devices for photonic communication applications. Luminescence properties in infrared (IR) region were examined two types material, an rare earth complex ionic dye, their potential use as applications was discussed. The luminescence mechanism elucidated this study suggested a guideline future IR materials. Novel fabricated by combining with various crystal structure utilizing...

Small chiral organic molecules with CD properties are in high demanded due to their potential use promising electronic and biological applications. Herein, we reveal a system which the oxidation of phosphino group corresponding phosphine oxide on inner rim helicene derivative induces CPL response. Laterally π-extended 7,8-dihydro[5]helicenes bearing groups helical rims (i. e., C1 position) were synthesized, structures unambiguously determined by X-ray crystallography. The photophysical...

Metal hole arrays with submicrometer dimensions were fabricated by a two-step molding process that uses anodic porous alumina ideally ordered configurations as starting material. The obtained metal (Ni) had geometrical structures identical to those of the original. Transmission spectra Ni array membranes show band-pass characteristic in visible range. cut-off wavelength long-wavelength region is dependent on size.

A new lithographic method is proposed and demonstrated that has the potential to make nano-fabrication a more widely available technique. Nanoelectrode lithography works by transferring pattern on nanoelectrode target via an electrochemical reaction. This technique may provide better throughput flexibility than conventional techniques. describes proves concept of lithography.

We have investigated proposed all-optical switching by use of cascading phase-matched sum-frequency-generation (SFG) and difference-frequency-generation (DFG) processes. The operation is accomplished both a π phase change an amplitude the signal field in SFG–DFG theoretically confirmed that switch requires least power any uses characteristics been numerically clarified, experimental full-switching when bulk-type periodically poled LiNbO3 used correspond to numerical analysis. An ultrafast...

Chemical nanoimprint lithography is proposed as a new category. The authors investigate chemical utilizing an electrochemical reaction based on the anodic oxidation that occurs result of moisture present between mold and substrate. For stable patterning, have developed silicon carbide with low resistance. also has excellent surface flatness mechanical strength. In addition, prototype nanoimprinter equipped step-and-repeat system. imprinter temperature-humidity controller mold-pressure...

Polymerization of the aniline in presence polyvinyl alcohol is carried out water for preparation polyaniline (PANI) nanospheres. The surface structures are observed with scanning electron microscopy (SEM). Carbonization PANI nanospheres provides carbon nanobeads structures. Preparation and nanocarbon from reported.