QUANTUM-DOT TRIGGERED PHOTON AND TRIGGERED PHOTON PAIR

摘要

The present invention provides a device and method for producing triggered single photons and triggered pairs of polarization-entangled photons. A light source (130) delivers a pulse (140) to a photon emitter (110) and generates pairs of electrons and holes to emit photons (150-1X, 150-2X, 150-3X). The light source includes means to tune a pulse wavelength to an excited state-absorption resonance of the photon emitter. The light source could also include means to selectively choose a polarization to create pairs of electrons and holes of a particular spin. A filter (160) isolates the last and single photon. Optionally a micro-cavity is included to direct the emitted photons and couple to one or more optical elements. When the device or method is used to produce triggered pairs of polarization-entangled photons it works almost the same as for the single photons, except for modifications to the way the light source excites the photon emitter and how emission filtering is performed.