Ks. Giboney et al., TRAVELING-WAVE PHOTODETECTORS WITH 172-GHZ BANDWIDTH AND 76-GHZ BANDWIDTH-EFFICIENCY PRODUCT, IEEE photonics technology letters, 7(4), 1995, pp. 412-414
Results of the first fabrication and measurement of travelling-wave ph
otodetectors are reported. The devices have bandwidths as high as 172
GHz, the highest reported for a p-i-n photodetector, and bandwidth-eff
iciency products as large as 76 GHz, the largest reported for any phot
odetector without gain. Comparisons with vertically illuminated and wa
veguide photodetectors fabricated on the same wafer establish the supe
rior performance of travelling-wave photodetectors. Microwave loss on
the travelling-wave photodetector structure is identified as a bandwid
th limitation.