The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We demonstrate for the first time a phase stabilized Kerr comb without the use of external references or non-linear interferometry. Out-of-loop measurements confirm good coherence and stability across the comb, with measured optical frequency fractional instabilities of 5×10−11/√τ
We report a novel way to generate frequency comb in normal GVD microresonator. By using single FSR intensity-modulated pump, we successfully observe a mode locked frequency comb and bright square pulse for the first time.
We report enhanced interlayer excitonic systems, excitons and trions, in trilayer transition metal dichalcogenides heterostructrues with photoluminescence spectroscopy. We investigate interlayer trion binding energy and carrier lifetime of interlayer excitons and trions.
An anisotropic acoustic metamaterial inspired by straw-stacks is reported for sound absorption wherefore the physics of porous media is enriched by tailoring inner resonances. The idealized periodic arrangement of straw-like hollow tubes is described in terms of the anisotropic Darcy permeability tensor and the effective compressibility accounting for both the thermo-elastic compressibility of the...
In this work, we proposed to demonstrate the entire 3D coronary tree using panoramic maximum intensity projection (MIP) of coronary arteries, and to detect and quantify coronary stenosis from computed tomography coronary angiography (CTCA). The performance of the proposed method was assessed in comparison with invasive coronary angiography (ICA) as reference standard. Six anonymized CTCA datasets...
The aim of this study was to develop a task set based on personalized material for nostalgic experience, which could detect cognitive ability via a virtual experience system combined with Kinect somatosensory interactive operation applications without the user wearing any accessory input device. Fifty-nine subjects participated in the experiment. The receiver operating characteristic curve of the...
This paper presents a study of the consistency of the values used as reference for the hardware delays of GPS P1 and P2 for calibration in the TAI network. The inter-signal biases dP1-dP2 are computed from the pseudorange measurements, after applying an ionospheric delay correction, and then compared to the calibrated values. It is shown that the differences between the computed dP1-dP2 and the calibrated...
Developing a compact, low power and high speed electro-optic modulator is crucial for overcoming the performance bottleneck of electronics. We review progress in chip based silicon compatible plasmonic modulator design, and discuss recent designs which have switching energy close to 1 fJ/bit.
Ge n- and p-FinFETs with different interfacial layer ferroelectric HfZrOx (IL-FE-HZO) gate stacks have been demonstrated systematically by various annealing conditions for the first time. Microwave annealing (MWA) not only shows enhanced FE characteristics but also suppresses the gate leakage and Ge interdiffusion compared with conventional rapid thermal annealing (RTA). While HZO on Al2O3 IL results...
This paper proposes a novel evaluation method for MEMS gyroscopes' packaging reliability. Based on the principles of thermodynamics and hydromechanics, the relationships among quality factors, air pressure, and gas number, as well as degradation models of them, are deducted for the first time. Experimental tests demonstrate that the relationships between the reciprocals of the two-mode quality factors...
This paper presents a grid-connected bi-directional modular multilevel converter (MMC) with division-summation (D-Σ) digital control to achieve power injection and rectification functions. The D-Σ digital control is adopted to track current reference, regulate dc-bus voltage and cell voltage, and balance the upper and lower dc-bus voltages. It can accommodate wide filter inductance variation and take...
This study investigates the cell voltages and arm currents in double-star modular multilevel converters (DSMMCs) based on power balance and current tracking control law. DSMMCs have been widely applied to static synchronous compensators, high-voltage direct-current transmission, back-to-back power transfer systems, wind/solar power generation and battery storage systems. The size of capacitors in...
We demonstrate high-bitrate coherent optical OFDM transmission utilizing low-noise Kerr frequency comb as multi-channel laser source. 4QAM-OFDM data with total bitrate of 136.0 Gb/s are successfully transmitted over a 100 km fiber link.
We demonstrate a spectrometer based on multiple interference and scattering in an ordinary frosted glass featuring random structures. The probe signal disperses through the frosted glass generating wavelength-dependent speckle patterns, which are detected by a charge coupled device chip and used to reconstruct the input spectrum after calibration. We consider an underdetermined system of linear equations...
We demonstrate a graphene-alumina-graphene heterostructured semiconductor chip, on which THz plasmons are generated via backward phase-matched 2nd nonlinearity all-optically. The on-chip plasmons are effectively gate tunable, with photon-efficiency ∼10−4, and Q factor > 60.
We report free carrier induced effective six-wave mixing in silicon. Unique features of this novel nonlinear wave mixing process, including strong detuning dependence, asymmetric sideband lineshape, and interactions with Kerr four-wave mixing are demonstrated.
We report a Si3N4 microresonator which simultaneously satisfies single-mode operation, high Q-factor and anomalous dispersion. With controlled high-speed pump-wavelength scanning, we successfully observe a smooth phase-locked Kerr frequency comb transition based on dissipative solitons.
The localized plasmon mode of the trapped metal nanoparticle shifts as it draws closer to the metallic substrate. This dynamically modifies its interaction energy with the trap and the trap force at the operating wavelength.
We report a 600-fold peak power enhancement of pulsed distributed feedback fiber lasers with monolayer graphene Q-switching. The tunable graphene-DFB fiber laser demonstrates sub-MHz linewidth and sub-μs pulses simultaneously, approaching the transform limit.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.