Notch-filtered adiabatic rapid passage for optically driven quantum light sources

Abstract

We present a driving scheme for solid-state quantum emitters, referred to as Notch-filtered Adiabatic Rapid Passage (NARP), that utilizes frequency-swept pulses containing a spectral hole resonant with the optical transition in the emitter. NARP enables high-fidelity state inversion and exhibits robustness to variations in the laser pulse parameters, benefits that derive from the insensitivity of the condition for adiabatic evolution. NARP also offers the advantage of immunity to phonon-mediated excitation-induced dephasing when positively-chirped control pulses are used. Our resonant driving approach could be combined with spectral filtering of the scattered pump light and photonic devices for enhanced collection efficiency to realize simultaneous high indistinguishability and brightness in single photon source applications.

Robust parallel laser driving of quantum dots for multiplexing of quantum light sources

“…These QDs could be isolated in different cavities and pumped using the same driving laser or one could exploit a dense ensemble integrated into a single broadband cavity. A channel separation of 0.75 meV would optimally exploit the resolution of standard 4f pulse shaping systems, which could be implemented in conjunction with spectral engineering techniques 13 – 16 . Such an approach would increase the bandwidth of quantum optical communication systems by 20-fold while simultaneously exploiting highly-developed classical communication hardware for wavelength division multiplexing, increasing the scalability of quantum networks without adding significant complexity.…”

Solid-state quantum emitters for photon generation excited by the SUPER scheme

“…However, it might be possible via notch-filtering to suppress the resonant component. 26 With its two off-resonant pulses, the SUPER scheme can also make use of spectral filtering. From all schemes, the highest detuning can be reached using the SUPER scheme.…”

Controlling the Photon Number Coherence of Solid-state Quantum Light Sources for Quantum Cryptography

“…The reX scheme is advantageous over the direct, resonant excitation of the exciton, due to the suppressed re-excitation and therefore provides high-purity photon states [10]. Because the exciting laser energy is different from the emitted photon energy, a challenging crosspolarization filtering is avoided and the photon count rate can be increased up to a factor of two, which is also achieved by several other recentlyproposed excitation schemes [41][42][43][44][45][46][47]. However, the indistinguishability of the single photons via the reX scheme suffers greatly from the spontaneous decay of the biexciton [48] and if a specific polarization is required, the photon output is reduced due to the two available decay channels.…”