Figure 4. Relaxation kinetics of cavity-coupled W(CO)₆.

Transient response of cavity-coupled W(CO)₆ as a function of delay between excitation and probe pulses. Open circles are the average of three traces at each indicated probe frequency. The traces are offset and, where indicated, scaled for clarity. Solid lines are global fits to a biexponential kinetics model that yields lifetimes of 22 ps for the fast component (upper polariton) and 170 ps for the slow component (reservoir ν=1 and LP). Error bars represent s.d. from three consecutive scans.