title: All-optical XOR logic gate using intersubband transition in III-V quantum well materials.
abstract: A monolithically integrated all-optical exclusive-OR (XOR) logic gate is experimentally demonstrated based on a Michelson interferometer (MI) gating device in InGaAs/AlAsSb coupled double quantum wells (CDQWs). The MI arms can convert the pump data with return-to-zero ON-OFF keying (RZ OOK) to binary phase-shift keying (BPSK) format, then two BPSK signals can interfere with each other for realizing a desired logical operation. All-optical format conversion from the RZ OOK to BPSK is based on the cross-phase modulation to the transverse electric (TE) probe wave, which is caused by the intersubband transition excited by the transverse magnetic (TM) pump light. Bit error rate measurements show that error free operation for both BPSK format conversion and XOR logical operation can be achieved.
authors.forename: Jijun
authors.initials: J
authors.lastname: Feng
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Akimoto
authors.forename: Shin-ichiro
authors.initials: S
authors.lastname: Gozu
authors.forename: Teruo
authors.initials: T
authors.lastname: Mozume