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Quantum Sensing and Nano Electronics and Photonics

Laser driving of quantum emitters using engineered optical pulses

Kimberley C. Hall, Grant R. Wilbur, Ali Binai-Motlagh, Alison Clarke, Ajan P. Ramachandran, Nick Milson, John Healey, Sabine O’Neal, DENNIS GLENN DEPPE

Published Mar 8, 2024• 0 citations
Publisher

Abstract

Optimal quantum control (OQC) enabled by femtosecond laser pulse shaping techniques provides a highly flexible approach to quantum states manipulation in solid-state qubit systems. Here we apply OQC to optimize the form of the triggering laser pulse for a single photon source. The use of a frequency-swept laser pulse possessing a notch resonant with the transition energy of the quantum emitter enables the spectral isolation of the emitted photon stream in conjunction with resonant driving for good indistinguishability. We show that the robustness of this scheme would enable spectral multiplexing of quantum light sources using a single triggering laser pulse.

DOI
10.1117/12.3003111

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Optimal quantum control (OQC) enabled by femtosecond laser pulse shaping techniques provides a highly flexible approach to quantum states manipulation in solid-state qubit systems. Here we apply OQC to optimize the form of the triggering laser pulse for a single photon source. The use of a frequency-swept laser pulse possessing a notch resonant with the transition energy of the quantum emitter enables the spectral isolation of the emitted photon stream in conjunction with resonant driving for good indistinguishability. We show that the robustness of this scheme would enable spectral multiplexing of quantum light sources using a single triggering laser pulse.
We present a driving scheme for solid-state quantum emitters using frequency-swept pulses containing a spectral hole resonant with the optical transition in the emitter. Our scheme enables high-fidelity state inversion, exhibits robustness to variations in the laser pulse parameters and is immune to phonon-mediated excitation-induced dephasing, benefits that derive from the the insensitivity of the adiabaticity condition to variations in the experimental parameters. 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.
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 are derived 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.
Semiconductor quantum dots (QDs) may be applied to solid-state quantum emitters of interest for quantum light sources or nodes in distributed quantum networks. For such emitters, resonant optical driving results in the highest degree of photon indistinguishability, but leads to the need to reject scattered light from the laser used to drive the emitter. In this work, we apply femtosecond pulse shaping techniques to the development of quantum state inversion strategies for QD emitters that optimize fidelity and source brightness. The control protocols we have developed would be applicable to a wide range of solid-state QE systems.
In this presentation I will describe a new laser driving scheme for triggered high-brightness single photon emitters using a chirped laser pulse possessing a spectral hole resonant with the transition energy of the emitter, referred to as Notch-filtered adiabatic rapid passage (NARP). When combined with optimized photonic structures for enhanced collection efficiency and commercial filters we estimate that NARP would provide less than 10-8 scattered photons per emitted photon with a 4% detection loss together with resonant driving for high photon indistinguishability. We demonstrate inversion using NARP experimentally in a single semiconductor QD.
The ability to shape photon emission facilitates strong photon-mediated interactions between disparate physical systems, thereby enabling applications in quantum information processing, simulation and communication. Spectral control in solid state platforms such as color centers, rare earth ions, and quantum dots is particularly attractive for realizing such applications on-chip. Here we propose the use of frequency-modulated optical transitions for spectral engineering of single photon emission. Using a scatteringmatrix formalism, we find that a two-level system, when modulated faster than its optical lifetime, can be treated as a single-photon source with a widely reconfigurable photon spectrum that is amenable to standard numerical optimization techniques. To enable the experimental demonstration of this spectral control scheme, we investigate the Stark tuning properties of the silicon vacancy in silicon carbide, a color center with promise for optical quantum information processing technologies. We find that the silicon vacancy possesses excellent spectral stability and tuning characteristics, allowing us to probe its fast modulation regime, observe the theoretically-predicted two-photon correlations, and demonstrate spectral engineering. Our results suggest that frequency modulation is a powerful technique for the generation of new light states with unprecedented control over the spectral and temporal properties of single photons.