Archive for April 2009
You are browsing the archives of 2009 April.
MESSENGER spacecraft reveals a dynamic Mercury
Discovery of the impact basin, Rembrandt, is the first time scientists have seen terrain well-exposed on the floor of a large impact basin.
Previous Stories
- Enhanced terahertz emission from coherent longitudinal optical phonons in a quantum well structure under applied bias
- Waveguide mode imaging and dispersion analysis with terahertz near-field microscopy
- Surface-plasmon resonance of a planar lollipop near-field transducer
- Surface microstructuring by laser-induced backside wet etching
- Surface microstructuring by laser-induced backside wet etching
- Single photon nonlinear optics on photonic crystal chips
- Single photon nonlinear optics on photonic crystal chips
- Single photon nonlinear optics on photonic crystal chips
- Spectral response design of hydrogenated amorphous silicon p-i-n diodes for ambient light sensing
- Multicolor photodetector based on GaAs quantum rings grown by droplet epitaxy
- Scaling of light emitting transistor for multigigahertz optical bandwidth
- Gain measurements in strain-compensated quantum cascade laser
- Retrieval of satellite pulses of single isolated attosecond pulses
- How to observe the 2009 Eta Aquarid meteor shower
- Resolving a galactic mystery
- Starbursts in dwarf galaxies are a global affair
- Advances in extreme-UV lithography
- Advances in extreme-UV lithography
- Watching solar activity muddle Earth’s magnetic field
- Rogue black holes may roam the Milky Way
- Near-infrared intersubband absorption in molecular-beam epitaxy-grown lattice-matched InAlN/GaN superlattices
- Large-area metamaterials on thin membranes for multilayer and curved applications at terahertz and higher frequencies
- Optofluidic evanescent dye laser based on a distributed feedback circular grating
- Defect reduction in (11[overline 2]2) semipolar GaN grown on m-plane sapphire using ScN interlayers
- Cosmic distance record smashed
- Highly stretchable, conductive, and transparent nanotube thin films
- GaN-based light-emitting diode with textured indium tin oxide transparent layer coated with AlO powder
- High-speed InGaAs/InP-based single-photon detector with high efficiency
- Plasmonic Bloch oscillations in chirped metal-dielectric structures
- Picosecond optical pulse generation from self-pulsating bisectional GaN-based blue-violet laser diodes
- Widely tunable distributed-feedback lasers with chirped gratings
- Surface plasmon enhanced photoconductance of gold nanoparticle arrays with incorporated alkane linkers
- Overcoming mask blank defects in EUV lithography
- Overcoming mask blank defects in EUV lithography
- Spirit rover resumes driving while analysis of problem behaviors continues
- Giant space tornadoes drive the northern lights
- Continent-sized radio telescope takes close-ups of Fermi active galaxies
- Solar wind tans young asteroids
- Field dependent electroluminescence from amorphous Si/SiN multilayer structure
- Metallic-like photoluminescence and absorption in fused silica surface flaws
- Photoelectrochemical etching of p-type GaN heterostructures
- Nonplanar chiral metamaterials with negative index
- Giant optical resonances due to gain-assisted Bloch surface plasmons
- Chandra shows shocking impact of galaxy jet
- See Mercury, the Moon, and the Pleiades together in the night sky
- Astronomers discover youngest and lowest-mass brown dwarfs
- Scientists discover lightest exoplanet yet
- Mass loss leaves close-in exoplanets exposed to the core
- Diffracted magneto-optical Kerr effect in one-dimensional magnetic gratings
- Nonequilibrium Green’s function calculation for four-level scheme terahertz quantum cascade lasers
- Atomic clock based on transient coherent population trapping
- Continuous wave second-harmonic generation using domain-disordered quasi-phase matching waveguides
- Orion study reveals chaotic and overcrowded stellar nursery
- The Sun’s elevation influences Moon dust
- Stephen Hawking rushed to the hospital
- Bulk photonic metamaterial with hyperbolic dispersion
- Substrate emitting index coupled quantum cascade lasers using biperiodic top metal grating
- Sky-event preview: The 2009 Lyrid meteor shower
- High-performance injectorless quantum cascade lasers emitting below 6 [mu]m
- Near-field imaging of coupled photonic-crystal microcavities
- Giant enhancement of top emission from ZnO thin film by nanopatterned Pt
- ‘Software’ correlators in radio astronomy
- ‘Software’ correlators in radio astronomy
- Ultra-clean carbon nanotube electron guns for use in space
- Ultra-clean carbon nanotube electron guns for use in space
- Ultra-clean carbon nanotube electron guns for use in space
- Nanostructured transparent metal electrodes for organic solar cells
- Nanostructured transparent metal electrodes for organic solar cells
- Kepler captures first views of planet-hunting territory
- New discovery challenges galaxy-formation theories
- Mars spacecraft teams on alert for dust storm season
- Semiconductor lasers with integrated plasmonic polarizers
- High output power density from GaN-based two-dimensional nanorod light-emitting diode arrays
- NASA spacecraft show three-dimensional anatomy of a solar storm
- Photonic crystal heteroslab-edge microcavity with high quality factor surface mode for index sensing
- High speed pulsed electrical spin injection in spin-light emitting diode
- Transparent amorphous silicon channel waveguides with silicon nitride intercladding layer
- Doping nanocrystals by in situ layer-by-layer overcoating
- Highly efficient and air-stable near infrared emission in erbium/bismuth codoped zeolites
- Hubble Space Telescope witnesses spectacular flaring in extragalactic jet from M87’s black hole
- Spirit rover healthy but computer reboots raise concerns
- Ultralow noise microwave generation with fiber-based optical frequency comb and application to atomic fountain clock
- Vertical coupling between short range surface plasmon polariton mode and dielectric waveguide mode
- Simple filters enable x-ray polarization measurements
- Simple filters enable x-ray polarization measurements
- Electromagnetically induced transparency in acetylene molecules with counterpropagating beams in V and Lambda schemes
- Separation of surface plasmon polariton from nonconfined cylindrical wave launched from single slits
- Effect of hollow-core photonic crystal fiber microstructure on transverse optical trapping
- NASA twin spacecraft may reveal secret of Moon’s origin
- Tapered fiber MachZehnder interferometer for simultaneous measurement of refractive index and temperature
- Wavelength agile superlattice quantum dot infrared photodetector
- Circularly polarized lasing in a (110)-oriented quantum well vertical-cavity surface-emitting laser under optical spin injection
- Herschel telescope and Planck satellite to lift off May 6
- First flight mirror completes cryogenic testing
- Carbon nanodevices for sensors, actuators, and electronics
- Carbon nanodevices for sensors, actuators, and electronics
- A subwavelength near-infrared negative index material
- Dust cover jettisoned from Kepler telescope
- The effect of the internal capacitance of InGaN-light emitting diode on the electrostatic discharge properties
- Cool stars have different mix of life-forming chemicals
- Ground-based observations support comet missions
- Electrically pumped quantum post vertical cavity surface emitting lasers
- High temperature cavity polaritons in epitaxial ErO on silicon
- 186 K operation of terahertz quantum-cascade lasers based on a diagonal design
- A young pulsar shows its hand
- Satellite to study near-Earth asteroids’ wobbly signature
- Birefringent solid-core photonic bandgap fibers assisted by interstitial air holes
- Direct observation of two-step polarization reversal by an opposite field in a substrate-free piezoelectric thin sheet
- Astronomers dissect a giant stellar explosion
- Most detailed map of nearby universe completed
- NASA joins “Around the World in 80 Telescopes”
- Adaptive optics using multiple laser guide stars
- High quality factor photonic crystal nanobeam cavities
- Mid-infrared tunable two-dimensional Talbot array illuminator
- Adaptive optics using multiple laser guide stars
- First high-resolution image of the young binary star Theta 1 Orionis C
- High-speed switching of spin polarization for proposed spin-photon memory
- Acoustoelectric luminescence from a field-effect n-i-p lateral junction
- Scalable implementation of strongly coupled cavity-quantum dot devices
- Direct-gap exciton and optical absorption in the Ge/SiGe quantum well system
- Strong coupling through optical positioning of a quantum dot in a photonic crystal cavity