We report a transient absorption microscopy study of charge carrier dynamics in bulk MoS 2 crystals at room temperature. Charge carriers are injected by interband absorption of a 555-nm pulse, and probed by measuring differential reflection of a time-delayed and spatially scanned 660-nm pulse. We find an intervalley transfer time of about 0.35 ps, an energy relaxation time of hot carriers on th...

Electron-hole generation and recombination rates for plasmon emission and absorption in graphene are presented. The recombination times of carriers due to plasmon emission are found to be in the tens of femtoseconds to hundreds of picoseconds range. The recombination times depend sensitively on the carrier energy, carrier density, temperature, and plasmon dispersion. Carriers near the Dirac poi...

in developing countries such as iran it was after economic crises and the increase in price of energy carriers and primary resources that industrial ecology was taken into consideration as a method in industrial states. 941 industrial states in iran have a high potential in creating material and energy flow networks with the industrial ecology approach to prevent massive energy loss and valuabl...

The energy relaxation of carriers in reduced graphene oxide thin films is studied using optical pump-probe spectroscopy with two probes of different colors. We measure the time difference between peaks of the carrier density at each probing energy by measuring a time-resolved differential transmission and find that the carrier density at the lower probing energy peaks later than that at the hig...