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Femtosecond time-resolved photoelectron spectroscopy has been used to measure the electron-phonon coupling constant of free size selected Nan+ (n=16-250) clusters. The extrapolated electron-phonon coupling constant of bulk sodium is gB sime 2:3 times 1016 W/m3K.
Sub-10-fs visible pulses allow real time detection of coherent phonons in single-walled carbon nanotubes. Nonlinear coupling between radial breathing (250 cm-1) and the carbon-stretching (1600 cm-1) modes is experimentally observed and theoretically modeled.
We investigated many-body and radiative coupling effects on intersubband Rabi oscillations in a multiple quantum well system. Under certain conditions, radiative coupling is the dominating effect, yielding distinctively different excitation behaviors in the wells.
We demonstrate a novel passive approach to terahertz pulse shaping based on altering the properties of surface waves propagating along a metal-dielectric interface. A simple time-domain numerical model explaining our observations is presented.
A femtosecond fiber laser with 1.5-MHz repetition rate was used to write directional couplers inside bulk glasses for the first time in the 1550-nm band. Waveguide losses and coupling strengths are reported for borosilicate glass.
The role of polarons in the quantum kinetics of carrier-phonon interaction is emphasized. Scattering processes involving polarons allow ultrafast relaxation even if the phonon energy is not resonant with the electronic transitions.
We report a 4x4 HPCF coupler, HPCF pigtailed VCSEL and PIN PD with a low insertion loss and coupling loss, which can be readily applied in high speed short reach PON.
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