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.
Efficient Terahertz output is generated from InGaN/GaN dot-in-a-wire light emitting diodes (LEDs) grown on Si(111). Under reverse bias, the THz output power is enhanced more than 4 times.
Terahertz spectroscopy reveals that the anisotropic electrical properties of nonpolar InN film along in-plane c-axis and in-plane m-axis are determined by the orientation of narrow and thin stacking faults, not by the density of defects.
Down-conversion from a THz beat generated by a two-frequency solid-state laser to a RF intermediate frequency is performed with a zero dispersion-slope fiber. The two interleaved four-wave mixing spectra contain more than 75 harmonics.
An experiment of two channels WDM with 5 Gb/s has been performed. Chaotic characteristics of the propagated signals with different GVD and nonlinear impairments in this optical-fiber link have been analyzed through these experimental data.
We proposed a simple method to measure the third-order intercept point for a photodiode using two-tone and two maximum-biased MZM. The measured IP3 of 16.04dBm agreed with that measured using traditional three-tone setup.
We demonstrate the formation of microcavity polaritons at room temperature in a dielectric microcavity embedded with ZnO nanoparticles. Stoke shift of polariton emission is shown to be dependent on the excitonic content of the polaritons.
A tunable orbital angular momentum (OAM) mode filter is proposed. Filtering/blocking selected channels from 4 spatially multiplexed OAM channels is demonstrated. An OSNR penalty of <2 dB is observed when using the filter for 100 Gb/s QPSK data channels.
Using photon-number resolving detectors, we directly measure the parity of coherent states in a Mach-Zehnder interferometer. Phases are super resolved by a factor of 150 and shot noise limited measurements are demonstrated with 200 photons.
We compare an analog and a digital method for characterizing the long-distance non-line-of-sight ultraviolet scattering channel. Experimental results and theoretical-model predictions are presented that provide demonstration and validation.
The polarization compositions of fundamental quasi-TE and quasi-TM modes of a strip silicon waveguide are characterized with free-space polarizers, and their polarization extinction ratios depend on the sizes of various apertures in the experimental setups.
Near bandwidth-limited 7-fs-pulses were delivered at the foci of high-NA objectives by employing broadband mirrors for dispersion compensation. The impact of 7-fs-pulses on the signal generation efficiency and contrast in nonlinear optical imaging was investigated.
We examine the fluorescence enhancements from various 3D metallic nanoantenna/molecules structures with different antenna shapes, metal types and spacer-molecule lengths. The results allow us to engineer optimal metallic structures for the fluorescence enhancement.
We present a causal numerical model for time domain simulations of the optical response of graphene. The dielectric function is approximated with a conductivity term, a Drude term and a number of the critical points terms.
We demonstrate a 3D photonic technology for fabrication of double-layer silicon waveguides in standard silicon. This technology eliminates the need for silicon-on-insulator (SOI) wafers and can be further expanded to multiple-layer photonics for different applications.
We demonstrate ultrafast optical control of near field coupled metamaterial resonances. We observed dynamical transition of the metamaterial resonances to change its state from coupled to decoupled, and back to the coupled state under photoexcitation.
We present ultra-strong light-matter interaction of a metamaterial mode and an intersubband transition for normal incidence radiation in the mid-infrared spectral region. The anti-crossed lines show a splitting of 15% of the central frequency.
We present the first experimental observation of a Floquet Topological Insulator in any physical system. We realize optical topologically-protected unidirectional edge states, without magnetic fields, using honeycomb photonic lattice of helical waveguides.
This work reports on the attosecond real-time observation of the electron processes [1] underlying the ability of ultrastrong few-cycle laser pulses to turn a dielectric solid from an insulating into a conducting state [2].
We present experimental and theoretical results of confined plasmons in graphene micro- and nano-structures. We present a FDTD technique to accurately model the measured data and demonstrate the importance of interactions between plasmonic structures.
Despite unique and fascinating capability in subwavelength optics, active control of optical plasmon resonance has been hampered by drastically weak optical response of free carriers at optical frequency. We demonstrate efficient control of optical plasmon resonance in gold nanorod with graphene by electrical gating.
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.