21-30 of 1,520 results for "stimulated emission at 300 176 k and simultaneous lasing at two wavelengths in epitaxial al inf x inf ga inf l x inf as injection lasers"

Silicon has been used in all photonic functions except lasing. We report evidence for stimulated emission in silicon nanocrystal microspheres under strong pulsed excitation.

We present preliminary experimental data revealing depletion dynamics for stimulated emission depletion (STED) microscopy as a function of excitation intensity, depletion intensity, time delay, and fluorophore damage. FluoSpheres 350/440(invitrogen) is used.

Whispering gallery mode (WGM) lasers hold promise because of their high Q and low thresholds. Their drawback, however, is the lack of directional emission. Deformed cavities support both regular and chaotic orbits that have emission directionality. Recent work...

We demonstrate the monolithic integration of a VCSEL half-cavity and a single-layer sub-wavelength grating as its top mirror. Polarization-selective amplified stimulated emission with selection ratio of 20 dB was obtained.

Recent studies of lasing and stimulated emission in luminescent /spl pi/-conjugated polymers performed by our group are presented. Optical properties of cylindrical high-Q polymer microcavities are discussed. The emission spectra of plastic microring...

Glass ceramic materials containing tetrahedral divalent cobalt ions have been recently introduced as laser saturable absorbers. Here we present study of stimulated emission from co-doped zinc-aluminosilicate glass ceramics (Co:ZAS).

The accurate and timely discovery of radio receivers can assist in the detection of radio-controlled explosives. Superheterodyne receivers emit low-power radio signals during normal operation. These are known as unintended emissions. In this paper, the unintended...

We report on stimulated emission (SE) at wavelengths up to 10.2 μm from waveguide HgCdTe structures with several quantum wells (QWs) inside the waveguide core. The onset of the SE takes place under optical pumping with intensity as low as 0.12 kW/cm2...

Summary form only given. Self-assembled semiconductor quantum dots have found interest as gain materials for semiconductor lasers. While time-resolved studies on quantum dots have mainly focused on the spontaneous recombination dynamics, little is known about the dynamics of...

Novel magneto-plasmonic emission phenomena are observed from excited Landau levels in In/sub x/Ga/sub 1-x/As quantum wells when pumped using intense femtosecond laser excitation in strong magnetic fields (25 T). The emission...