H. Sakata et al., OPTICALLY CONTROLLED S-SHAPED AND N-SHAPED NEGATIVE DIFFERENTIAL RESISTANCES BY RESONANT-TUNNELING TRIANGULAR-BARRIER OPTOELECTRONIC SWITCH(R-TOPS), Optical and quantum electronics, 28(5), 1996, pp. 591-597
We report novel optoelectronic functions in a resonant-tunnelling tria
ngular-barrier optoelectronic switch (R-TOPS). We successfully observe
d optically controlled S- and N-shaped negative differential resistanc
es (NDRs) simultaneously in a single device. Different types of optoel
ectronic bistabilities originating from S- and N-shaped NDRs were obta
ined by changing the input light power. We also obtained the different
ial gain characteristics and latch characteristics from S-shaped NDR b
y changing the bias voltages. These characteristics with their differe
nt behaviours make it possible to realize novel optoelectronic switchi
ng.