Abstract
We analyze the optoelectronic mixing characteristics of an InAlAs, Schottky-enhanced, InGaAs-based metal-semiconductor-metal photodetector. We show that the mixing efficiency of this device depends on the thickness of the InAlAs Schottky-enhancement layer: For thick enhancement layers (/spl ap/ 500 /spl Aring/), the bandwidth of the device when utilized as an optoelectronic mixer is less than the bandwidth of the device when utilized as a simple photodetector. In addition, the mixing efficiency depends on the light-modulation, local-oscillator, and mixed-signal frequencies, and decreases nonlinearly with decrease in optical power. For thin enhancement layers (/spl ap/ 100 /spl Aring/), the mixing characteristics improve: The bandwidth of the optoelectronic mixer is similar to that of a corresponding photodetector and the mixing efficiency decreases only slightly with decrease in optical power. We attribute the observed behavior to the band-gap discontinuity associated with the InAlAs Schottky enhancement layer.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
