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.
Modern navigation systems integrate the global positioning system (GPS) with an inertial navigation system (INS), which complement each other for correct attitude and velocity determination. The core of the INS integrates accelerometers and gyroscopes used to measure forces and angular rate in the vehicular inertial reference frame. With the help of gyroscopes and by integrating the acceleration to...
The metasurface concept is employed to planarize retroflectors by stacking two metasurfaces with separation that is two orders larger than the wavelength. Here, a retroreflective metasurface using subwavelength‐thick reconfigurable C‐shaped resonators (RCRs) is reported, which reduces the overall thickness from the previous record of 590 λ0 down to only 0.2 λ0. The geometry of RCRs could be in situ...
We demonstrate a single-photon SWAP gate between polarization and spatial momentum on a SOI chip. 19.8% error ratio is obtained, and phase coherence of the SWAP operation is measured via single photon interference with up to 58.7% visibility.
We study experimentally and theoretically the use of photonic crystal nano-cavity to generate a broad range of waveforms, mediating by Drude electron-hole plasma in silicon, and coming from the dynamical states at varying operating conditions.
We report efficient on-chip Turing pattern formation, uniquely enabled by mode-hybridization induced phase matching. Destabilization of Turing pattern is circumvented, thereby achieving unprecedented pump depletion and record high external pump-to-comb conversion efficiency of 45%.
We demonstrate the power dependence of high-Q OMOs, which permits pre-oscillation, oscillation, and chaos like performance. Power dependence on mechanical frequency is also modeled and simulations are compared to the measured data.
Synchronization between two very close mechanical modes in air-slot PhC optomechanical oscillators is observed with drive powers above threshold. Improvement in phase noise (−70 dBc/Hz at 10 kHz offset) for the synchronized OMO is reported.
We report an integrated silicon polarization rotator, with dual-level aligned fabrication. The rotator has record high 25-dB extinction, low 2-dB loss, with near-perfect rotation of 90.03±8.85 degrees across 100-nm wavelengths for chip-scale polarization diversity.
We report chip-scale Turing frequency comb with narrow linewidth of 9 kHz and long term stability of 160 kHz on THz carriers. The Turing comb is transferred onto a plasmonic photomixer, achieving 600 μW terahertz radiation with high 1.1% optical-to-terahertz power conversion at room temperature.
We demonstrate a new type of microresonator frequency comb where the momentum conservation law is fulfilled by azimuthal modulation of the waveguide dispersion, mathematically equivalent to the formation of Faraday instability. The concept expands the parametric range in which a microresonator frequency comb is obtained.
We demonstrate high-speed modulations in dual-polarization (DP) quadrature phase shift keying and DP 16- and 32-quadrature amplitude modulation formats with radio frequency driving voltage as low as 2 Vppd using a packaged monolithic silicon DP in-phase quadrature modulator that employs a highly efficient vertical p-n junction rib-waveguide phase shifter.
We demonstrated the all-optical microwave frequency mixer in the integrated photonic circuits. A microwave light is mixed with the mechanical frequency by nonlinear optomechanical coupling, which is explained by stokes and anti-stokes process.
We study the coherent comb formation by a bichromatic pump and detail noise state transitions by detuning the seeding. We also show comb spacing in a coherent state can be tuned by 40 MHz. The work paves a way towards coherently tunable comb oscillator for chip-scale RF-optical frequency division and clockworks.
We report a tunable metamaterial for wide-angle and broadband absorption by tuning the height of meta-water-capsule through microfluidics. An 80% absorption is achieved within 67% bandwidth when the incident angle varies from 0° to 45°.
Here we report a record solid-state optomechanical oscillator for acceleration detection down to the thermodynamical limit, at 730 ng/Hz1/2 resolution and 193 ng/Hz sensitivity, through optical pumping and RF readout of the radiation-pressure-driven backaction oscillation.
We demonstrate the controllable optomechanical coupling by changing the position of fiber anchored on device, and the intracavity locking between the OMO and self-pulsation showing 1/6 sub-harmonics in wide optical detunings in the optomechanical cavities.
We demonstrate a chip-scale optomechanical cavity operating around 77.7-kHz which exhibits 44+ GHz/nm optomechanical coupling. The 58-kHz force-induced RF dynamic range and 100+ order harmonics are obtained with frequency instability of ∼10−6 at 0.1 sec.
High-extinction-ratio 10-Gb/s modulation in carrier-depletion silicon Mach-Zehnder modulator is demonstrated with RF amplitude as low as 3.6 Vpp at temperatures up to 130 °C without thermo-electric cooling. Algebraic representation of DC optical characteristics is presented.
We demonstrate 10-Gb/s high-on/off-contrast modulation of a carrier-depletion silicon Mach-Zehnder modulator having 3-mm rib-waveguide phase shifter driven with RF 3.6 VPP or lower at temperatures up to 130 °C without thermo-electric cooling.
Rapid growth in the demand for data traffic has facilitated the introduction of high-capacity digital coherent transmission for long-haul optical fiber networks. For successful digital coherent transmission to metro-area networks or shorter ranges, the cost and size of transmission equipment and its components must be further reduced. Silicon photonics is a fascinating technology to meet this requirement...
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.