Demonstration of an ultrafast logic gate by interference of coherent transients

Ross, W.; Drobizhev, M.; Sigel, C.; Rebane, A. (1999). Demonstration of an ultrafast logic gate by interference of coherent transients. Laser Physics, 9 (5), 1102−1107.
ajakirjaartikkel
Ross, W.; Drobizhev, M.; Sigel, C.; Rebane, A.
  • Inglise
Laser Phys.
Laser Physics
1555-6611
1054-660X
9
5
1999
11021107
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
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English, We demonstrate an ultrafast three-port all-optical Taffoli logic gate by using interference of femtosecond laser pulses with two-pulse photon echo in dye-doped polymer films at low temperatures. The gate performs an operation of "controlled controlled NOT" on the time scale of less than 1 ps, using one spatial spot. We show that an important condition for this gate is the causal nature of the coherent transient response. Relevant truth table is implemented only if pulses coming later in time do not influence the interference of the pulses applied earlier in time. The other special property of the gate is coherent phase memory about the input pulses. We suggest that if the excited electronic state coherence time is much longer than the duration of the pulses, then it is possible to implement a coherent logic gate with a large number of inputs.
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