Tunneling and coupling between one-dimensional states in double quantum wires

Evidence of tunneling and electronic coupling in a one-dimensional system is reported. This is accomplished by comparing low-temperature photoluminescence and photoluminescence excitation spectra of GaAs double quantum wires of different barrier widths with a full 4 x 4 k . p calculation of coupled interband transitions. [S0163-1829(98)01228-4]