UNIVERSAL FULLY OPTICAL LOGIC ELEMENT Russian patent published in 2021 - IPC G02F3/02 

FIELD: digital technology.

SUBSTANCE: invention relates to fully optical logic elements implemented using the concept of non-equilibrium condensation of exciton-polaritons into a non-basic state. The fully optical logic element includes an organic semiconductor sample placed in a microresonator with a Q-factor in the range from 500 to 600, a coherent source of continuous optical pumping to form an exciton reservoir by non-resonant excitation of the sample, with a pump beam energy to provide a condition for spontaneous condensation of exciton polaritons from an exciton reservoir, a source of radiation of one or two seed pulse beams to stimulate the relaxation process of a hot exciton into a non-basic state of the lower polariton branch. In this case, the energy of non-resonant optical pumping is tuned to one vibronic quantum of energy higher than the seed energy. To perform the controlled logic function “NOT”, one seed beam is used, and with constant optical pumping, a logical unit is present at the output of the logic element, and the seed beam acts as a control input signal that switches the output signal between states “1”and “0”. To perform the controlled logic function “OR NOT”, two seed beams are used, and with constant optical pumping, a logical unit is present at the output of the logic element, and each seed beam acts as a control input signal that switches the output signal between states “1” and “0”.

EFFECT: implementation of a universal polariton gate is the main building block for a platform for a fully optical logic circuit operating at room temperature at high speed.

12 cl, 8 dwg