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 describe cascaded difference-frequency generation (DFG) between multiple laser-lines generating terahertz pulses at >10% energy-conversion efficiency. DFG initiated by a laser-line and weak laser-seed rapidly cascades to self-generate multiple laser-lines and produce exponential terahertz growth.
We model, fabricate and characterize hybrid silicon carbide-nanodiamond microdisk resonators on a silicon wafer. Diamond's silicon-vacancy emission couples to the whispering gallery resonances for a potential Purcell enhancement up to the modeled F = 75.
We show megapixel-resolution short-wave infrared single-photon imaging with a timing resolution of 150 ps utilizing one superconducting nanowire single-photon detector and compressive imaging.
We experimentally demonstrate deterministic tuning of photon statistics and controlled bunching of photons in off-diagonal disordered lattices. We achieve this by gradually activating the chiral mode pairs with a coherent structured illumination.
Porous SiC co-doped with B and N was passivated by atomic layer deposited (ALD) Al2O3 films to enhance the photoluminescence. After optimizing the deposition conditions, as high as 14.9 times photoluminescence enhancement has been achieved.
Surface nanoscale axial photonics (SNAP) structures are created with a femtosecond laser inscription for the first time. A micron-thin inscription, introduced along the fiber axis, is characterized by the measured subnanometer-small effective fiber radius variation.
We demonstrate a cylindrically symmetric radial laser emission from a CdSe/CdS/ZnS quantum dots doped hexane plug in an omnidirectional photonic-bandgap fiber cavity. The lasing threshold, polarization dependence and quality factor of lasing mode are characterized.
A graphene-based, high speed, in-fiber optical modulator has been demonstrated on a low-loss side-polished optical fiber platform. These results highlight the potential for robust and efficient integration of low-dimensional materials within standard telecom fibers.
We propose a new making method for fiber grating based on self-assembly of nanoparticles which are actively attracted to attach onto micro-tapered fibers by Van der Wall's force in an evenly-spaced manner for sensing applications.
We report experimental analysis of optical fibers thermally poled over long lengths using novel types of internal liquid electrodes to generate effective second-order nonlinearities. Our analysis includes transmission losses, depletion region formation, SHG at telecom pump wavelengths.
A 0.1-Hz 4.0-PW Ti:sapphire laser is being developed for research on relativistic laser-matter interactions. The development will be achieved by increasing the pulse energy to 84 J and decreasing the pulse duration to 21 fs.
Using a wavelength division multiplexer, we increase the spectral bandwidth of a multimode-fiber-based spectrometer to 100nm with the spectral resolution of 0.03nm. An effective algorithm is developed to achieve fast, accurate reconstruction of diversified spectra.
We demonstrated vertically coupled, hydrogenated amorphous silicon ring resonators by leveraging low temperature deposition of the material where SU-8 polymer was employed as planarization layer and resonator gap material.
Heterogeneous integration of SiGe/Ge and III-V semiconductors on Si platform enables low-power electronic-photonic integrated circuits because of their superior electronic and photonic properties. We discuss opportunities and challenges of SiGe/Ge and III-Vs for CMOS photonics.
We demonstrate low-loss coupling to single-mode fibers and photonic integrated circuits (PIC) using in-situ fabrication of free-form microlenses on device facets. Measured coupling losses down to 0.8 dB (0.5 dB) are achieved for chip-fiber (fiber-fiber) interfaces.
We show the ability to tune the optical properties of clad-less suspended microresonator by fully integrating thermal heating circuit with platinum suspended wires, and without affecting the optical performance of the device.
We demonstrate a way to engineer a second-order nonlinearity (χ(2)) in silicon-dielectric multilayers via the electric-field induced second-harmonic effect. The value of χ(2) measured using the Maker fringe method is 1.2 pm/V.
This paper introduces an exciting new hut-like texturing pattern that shows lower Reflectance than pyramids and nanowires in the shorter and longer wavelengths respectively.
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.