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We show that arrival times for electromagnetic pulses measured through therate of absorption in an ideal impedance matched detector are equivalent to thearrival times using the average flow of optical energy as proposed by Peatross{\it et al.} [ Phys. Rev. Lett. {\bf 84}, 2370 (2000)]. We then investigate thetransport of optical pulses through dispersive media with negative dielectricpermittivity and negative refractive index choosing the geometry such that noresonant effects come into play. For evanescent waves, the definitions of thegroup delay and the reshaping delay get interchanged in comparison topropagating waves. The total delay times for the evanescent waves can benegative in an infinite plasma medium even for broad-band pulses. The totaltime is, however, positive for broad band pulses in the presence of aninterface when the radiation is detected outside the plasma. We find evidenceof the Hartman effect for pulses when the distance traversed in the plasma ismuch smaller than the free space pulse length. We also show that for a negativerefractive index medium(NRM) with $\epsilon(\omega)$ = $\mu(\omega)$ thereshaping delay for propagating waves is identically zero. The total delay timein NRM is otherwise dominated by the reshaping delay time, and for broad bandpulses in NRM the total delay time is subluminal

Delay times and detector times for optical pulses traversing plasmas and negative refractive media