Interfacing Spins in an InGaAs Quantum Dot to a Semiconductor Waveguide Circuit Using Emitted Photons

Luxmoore, I. J.; Wasley, Nicholas Andrew; Ramsay, Andrew J.; Thijssen, A. C. T.; Oulton, Ruth; Hugues, Maxime; Kasture, Sachin; Achanta, Venu Gopal; Fox, A. M.; Skolnick, M. S.

doi:10.1103/physrevlett.110.037402

Cited by 143 publications

(116 citation statements)

References 27 publications

Supporting

Mentioning

114

Contrasting

Order By: Relevance

“…Being a fundamental optical effect, it also brings crossdisciplinary similarities, for example, spin-current injections and related effects in solid-state electronic devices. Control of the state of light polarization in such an integratable manner also puts on the agenda spintronic-spinoptical integrated circuitry, enabling the control of individual electron spins in semiconductor structures 23 . With reciprocal control of emission/absorption in spin-selective quantum dots and waveguided mode excitation control, other applications may exist in quantum information processing with efficient in/out coupling to spin-sensitive quantum emitters of single photons.…”

Section: Resultsmentioning

confidence: 99%

Spin–orbit coupling in surface plasmon scattering by nanostructures

et al. 2014

View full text Add to dashboard Cite

The spin Hall effect leads to the separation of electrons with opposite spins in different directions perpendicular to the electric current flow because of interaction between spin and orbital angular momenta. Similarly, photons with opposite spins (different handedness of circular light polarization) may take different trajectories when interacting with metasurfaces that break spatial inversion symmetry or when the inversion symmetry is broken by the radiation of a dipole near an interface. Here we demonstrate a reciprocal effect of spin-orbit coupling when the direction of propagation of a surface plasmon wave, which intrinsically has unusual transverse spin, determines a scattering direction of spin-carrying photons. This spin-orbit coupling effect is an optical analogue of the spin injection in solid-state spintronic devices (inverse spin Hall effect) and may be important for optical information processing, quantum optical technology and topological surface metrology.

show abstract

Section: Resultsmentioning

confidence: 99%

Spin–orbit coupling in surface plasmon scattering by nanostructures

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Fig. 1.c, which enables the deterministic interfacing of single emitters and single photons that is not possible in other waveguide systems [1,2]. An ideal directional photon-emitter interface corresponds to β dir → 1, which likely can be achieved by further engineering of the GPW.…”

mentioning

confidence: 99%

“…In a regular waveguide, a quantum emitter radiates photons in either of two directions, and photon emission and absorption are reverse processes. This symmetry is violated in nanophotonic structures where a non-transversal local electric field implies that both photon emission [1,2] and scattering [3] may become directional. Here we experimentally demonstrate that the internal state of a quantum emitter determines the chirality of single-photon emission in a specially engineered photonic-crystal waveguide.…”

mentioning

confidence: 99%

Deterministic photon–emitter coupling in chiral photonic circuits

et al. 2015

View full text Add to dashboard Cite

The ability to engineer photon emission and photon scattering is at the heart of modern photonics applications ranging from light harvesting, through novel compact light sources, to quantuminformation processing based on single photons. Nanophotonic waveguides are particularly well suited for such applications since they confine photon propagation to a 1D geometry thereby increasing the interaction between light and matter. Adding chiral functionalities to nanophotonic waveguides lead to new opportunities enabling integrated and robust quantum-photonic devices or the observation of novel topological photonic states. In a regular waveguide, a quantum emitter radiates photons in either of two directions, and photon emission and absorption are reverse processes. This symmetry is violated in nanophotonic structures where a non-transversal local electric field implies that both photon emission [1,2] and scattering [3] may become directional. Here we experimentally demonstrate that the internal state of a quantum emitter determines the chirality of single-photon emission in a specially engineered photonic-crystal waveguide. Single-photon emission into the waveguide with a directionality of more than 90% is observed under conditions where practically all emitted photons are coupled to the waveguide. Such deterministic and highly directional photon emission enables on-chip optical diodes, circulators operating at the single-photon level, and deterministic quantum gates. Based on our experimental demonstration, we propose an experimentally achievable and fully scalable deterministic photon-photon CNOT gate, which so far has been missing in photonic quantum-information processing where most gates are probabilistic [4]. Chiral photonic circuits will enable dissipative preparation of entangled states of multiple emitters [5], may lead to novel topological photon states [6,7], or can be applied in a classical regime to obtain highly directional photon scattering [8][9][10].Truly 1D photon-emitter interfaces are desirable for a range of applications in photonic quantum-information processing [11]. To this end, photonic-crystal waveguides constitute an ideal platform featuring on-chip integration with the ability to engineer the light-matter coupling. Recent experiments have achieved a coupling efficiency for a single quantum dot (QD) to a photoniccrystal waveguide in excess of 98%, thus constituting a deterministic 1D photon-emitter interface [12]. Standard photonic-crystal waveguides are mirror symmetric around the center of the waveguide and as a consequence the mode polarization is predominantly linear at the positions where light intensity is high. By designing a photonic-crystal waveguide that breaks this symmetry, modes that are circularly polarized at the field maxima can be engineered. We refer to this novel type of waveguide as a glide-plane waveguide (GPW), cf. Supplementary Material for further descriptions of the structural parameters. In a GPW, a QD with a circularly polarized transition dipole emits preferential...

show abstract

“…Using this strategy, an on-chip QD-beam splitter and QD-spin interface have been recently demonstrated. 8,9 On the detection side, a superconducting nanowire located in the evanescent field of a ridge waveguide can be used to detect guided photons with low noise and high efficiency. 10 Despite these promising advances, the tailoring of QD spontaneous emission by ridge waveguides has not yet been investigated experimentally.…”

mentioning

confidence: 99%

Quantum dot spontaneous emission control in a ridge waveguide

Stepanov

Delga

Zang

et al. 2015

Applied Physics Letters

View full text Add to dashboard Cite

International audienceWe investigate the spontaneous emission (SE) of self-assembled InAs quantum dots (QDs) embedded in GaAs ridge waveguides that lay on a low index substrate. In thin enough waveguides, the coupling to the fundamental guided mode is vanishingly small. A pronounced anisotropy in the coupling to non-guided modes is then directly evidenced by normal-incidence photoluminescence polarization measurements. In this regime, a measurement of the QD decay rate reveals a SE inhibition by a factor up to 4. In larger wires, which ensure an optimal transverse confinement of the fundamental guided mode, the decay rate approaches the bulk value. Building on the good agreement with theoretical predictions, we infer from calculations the fraction β of SE coupled to the fundamental guided mode for some important QD excitonic complexes. For a charged exciton (isotropic in plane optical dipole), β reaches 0.61 at maximum for an on-axis QD. In the case of a purely transverse linear optical dipole, β increases up to 0.91. This optimal configuration is achievable through the selective excitation of one of the bright neutral excitons

show abstract

Interfacing Spins in an InGaAs Quantum Dot to a Semiconductor Waveguide Circuit Using Emitted Photons

Cited by 143 publications

References 27 publications

Spin–orbit coupling in surface plasmon scattering by nanostructures

Spin–orbit coupling in surface plasmon scattering by nanostructures

Deterministic photon–emitter coupling in chiral photonic circuits

Quantum dot spontaneous emission control in a ridge waveguide

Contact Info

Product

Resources

About