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Frontiers in Optics

Deterministic single photon subtraction using solid state emitters coupled to chiral waveguides

Supratik Sarkar, Jinjin Du, Michal Bajcsy

Published Jan 1, 2019• 0 citations
Publisher

Abstract

We provide analytical treatment and numerical solutions using input-output formalism to explore the experimental feasibility and efficiency of deterministic single-photon subtraction using a three-level quantum emitter coupled to a chiral waveguide.
DOI
10.1364/fio.2019.jtu3a.37

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Abstract We propose a scheme for deterministic single photon subtraction based on Single Photon Raman Interaction (SPRINT) with a three-level quantum emitter coupled to a chiral waveguide and present an analytical and numerical study of its feasibility. We show that single photon subtraction probability for pulsed input light in a coherent or a Fock state can approach unity in the ideal limit and discuss the potential of various reported quantum emitter-waveguide platforms as candidates for experimental realization of our scheme. The use of chiral slow-light photonic crystal waveguides coupled to Λ -type emitters can perform efficient photon subtraction. While integrating cold atoms to such systems remains technically challenging, solid-state emitters offer a potentially practical path to realize such photon subtraction.
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We present a specialized photon subtraction scheme that allows for the deterministic extraction of single photons from multiphoton states while preserving the input single-photon states unaltered. The proposed device integrates two Λ-type emitters with transitions selectively coupled to a single chiral waveguide through single photon Raman interaction (SPRINT). We develop a comprehensive theoretical model for the system using the input-output formalism within the SLH framework and conduct numerical simulations to analyze its interaction with traveling few-photon pulses of coherent light. We use these simulations to predict the scheme's operation and highlight how this two-emitter extension improves the original SPRINT-based deterministic single-photon subtraction when it comes to implementing undetectable photon number splitting attack on a quantum key distribution channel.
We investigate a single-photon diode realized by a one-dimensional waveguide chirally coupled to NNN spatially separated $\mathrm{\ensuremath{\Lambda}}$-type three-level emitters. An external laser is introduced to drive the emitters. The single photons moving in opposite directions show different transmission probabilities, which underpins the diode behavior. In the case of a single emitter, the single-photon diode works well at specific frequency points, which are tunable by the external laser. In the case of multiple emitters, the optimal-working-frequency point of the diode can be turned to a broad band.
We present a scheme for realizing deterministic single-photon subtraction in a coupled single quantum dot-cavity solid-state system. The device consists of a charged quantum dot and its coupled bimodal photonic crystal cavity with a moderate magnetic field applied in a Voigt configuration. We numerically simulate injection of optical pulses into one of the cavity modes and show that the system deterministically transfers one photon into the second cavity mode for input pulses in the form of both Fock states and coherent states. This device has potential in the application of a compact and integrated solid-state based device for quantum information processing.