Abstract
15-fs optical pulses delivered by a Ti:sapphire oscillator can be optically rectified in second-order nonlinear materials such as GaAs, GaSe, or AgGaS2. The fast polarization transient thus induced radiates a mid-infrared pulse whose spectrum extends from 5 to 15 μm, with a pulse duration as short as 40 Fs.1 These pulses are ideally suited for investigating intersubband relaxation in quantum wells.
© 1997 Optical Society of America
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