In this letter, we present optical mixing in epitaxial lift-off (ELO) pseudomorphic HEMT's (PHEMT's) at difference frequencies in the microwave regime up to 22 GHz. The 3 mu m gate length AlGaAs-InGaAs PHEMT's were lifted off their host GaAs substrates and subsequently attached to quartz slides. It was observed that the ELO devices consistently resulted in stronger signals (similar to 7 dB) than the non-ELO devices under frontside and backside illumination, This is attributed to improved optical coupling efficiency, a decrease in substrate leakage, and an illumination-induced back gating effect for the ELO films.
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Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USAUniv Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
Lee, Kyusang
Zimmerman, Jeramy D.
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Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USAUniv Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
Zimmerman, Jeramy D.
Xiao, Xin
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Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USAUniv Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
Xiao, Xin
Sun, Kai
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Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USAUniv Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
Sun, Kai
Forrest, Stephen R.
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Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USAUniv Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA