Abstract

Using a GaAs layer grown by molecular-beam epitaxy at low substrate temperature as an optical semiconductor switch, we demonstrate the generation of picosecond infrared pulses at 10.6 μm. To our knowledge, this is the first time that ultrashort pulses have been generated by use of only one reflective switch. A cross-correlation method, which is used to measure the pulse width, indicates that the pulse width is ~1 ps. A 200-nm-thick, low-temperature molecular-beam-epitaxy-grown GaAs layer, acting as an ultrafast active switching element, was grown at a low temperature of 320 °C on a GaAs substrate and annealed at 550 °C. The presence of a high density of As precipitates in this material that act as fast recombination centers gives the optically injected carriers in low-temperature molecular-beam-epitaxy-grown GaAs a lifetime of 0.5 ps. We also discuss the feasibility of the extension of this technique to other mid- and far-infrared lasers.

© 1994 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription