Large-range frequency tuning of a narrow-linewidth quantum emitter

Zhai, Liang; Löbl, Matthias C.; Jahn, Jan-Philipp; Huo, Yongheng; Treutlein, Philipp; Schmidt, Oliver G.; Rastelli, Armando; Warburton, Richard J.

doi:10.1063/5.0017995

Cited by 20 publications

(17 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, this enables the storage of QD single-photons in quantum memory made of a rubidium atoms ensemble [8] or Silicon vacancies [9], a possibly crucial step for the repeater-based quantum internet. To reach this wavelength range, GaAs QDs in an AlGaAs matrix can be used [6,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Charge Tunable GaAs Quantum Dots in a Photonic n-i-p Diode

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this submission, we discuss the growth of charge-controllable GaAs quantum dots embedded in an n-i-p diode structure, from the perspective of a molecular beam epitaxy grower. The QDs show no blinking and narrow linewidths. We show that the parameters used led to a bimodal growth mode of QDs resulting from low arsenic surface coverage. We identify one of the modes as that showing good properties found in previous work. As the morphology of the fabricated QDs does not hint at outstanding properties, we attribute the good performance of this sample to the low impurity levels in the matrix material and the ability of n- and p-doped contact regions to stabilize the charge state. We present the challenges met in characterizing the sample with ensemble photoluminescence spectroscopy caused by the photonic structure used. We show two straightforward methods to overcome this hurdle and gain insight into QD emission properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Charge Tunable GaAs Quantum Dots in a Photonic n-i-p Diode

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a result, many dynamic tuning techniques have been studied and applied in the past years. Researchers have demonstrated control over spectral properties mechanically [ 3 , 5 , 6 , 7 , 8 ], thermally [ 1 , 2 , 9 , 10 , 11 , 12 ], electrically [ 13 , 14 , 15 , 16 , 17 , 18 ], optically [ 19 , 20 , 21 , 22 ], and magnetically [ 23 , 24 , 25 , 26 , 27 , 28 , 29 ], leading to a multitude of practical devices.…”

Section: Introductionmentioning

confidence: 99%

Piston-Type Optical Modulator for Dynamic Thermal Radiation Tuning Applications

Caratenuto

Zheng

2021

Materials

View full text Add to dashboard Cite

This study introduces a movable piston-like structure that provides a simple and cost-effective avenue for dynamically tuning thermal radiation. This structure leverages two materials with dissimilar optical responses—graphite and aluminum—to modulate from a state of high reflectance to a state of high absorptance. A cavity is created in the graphite to house an aluminum cylinder, which is displaced to actuate the device. In its raised state, the large aluminum surface area promotes a highly reflective response, while in its lowered state, the expanded graphite surface area and blackbody cavity-like interactions significantly enhance absorptance. By optimizing the area ratio, reflectance tunability of over 30% is achieved for nearly the entire ultraviolet, visible, and near-infrared wavelength regions. Furthermore, a theoretical analysis postulates wavelength-dependent effectivenesses as high as 0.70 for this method, indicating that tunabilities approaching 70% can be achieved by exploiting near-ideal absorbers and reflectors. The analog nature of this control method allows for an infinitely variable optical response between the upper and lower bounds of the device. These valuable characteristics would enable this material structure to serve practical applications, such as reducing cost and energy requirements for environmental temperature management operations.

show abstract

“…Our semiconductor system consists of GaAs QDs in an Al 0.33 Ga 0.67 As matrix grown by local droplet etching 21 [Figure 1(a)]. These QDs create single photons at deepred wavelengths (750 − 800 nm), a very convenient spectral band: low-loss optical fibres, semiconductor lasers and highly efficient single-photon detectors are readily available.…”

mentioning

confidence: 99%

Quantum Interference of Identical Photons from Remote GaAs Quantum Dots

Zhai,

Nguyen,

Spinnler

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Photonic quantum technology provides a viable route to quantum communication 1,2 , quantum simulation 3 , and quantum information processing 4 . Recent progress has seen the realisation of boson sampling using 20 single-photons 3 and quantum key distribution over hundreds of kilometres 2 . Scaling the complexity requires photonic architectures containing a large number of single photons, multiple photon-sources and photon-counters. Semiconductor quantum dots are bright and fast sources of coherent single-photons [5][6][7][8][9] . For applications, a significant roadblock is the poor quantum coherence upon interfering single photons created by independent quantum dots 10,11 . Here, we demonstrate two-photon interference with near-unity visibility using photons from remote quantum dots. Exploiting the quantum interference, we demonstrate a photonic controlled-not circuit and a high-fidelity entanglement between photons of different origins. Our results provide a long-awaited solution to the challenge of creating coherent single-photons in a scalable way. In the near future, they point to a demonstration of quantum advantage using quantum-dot single photons 8 and an implementation of device-independent quantum key distribution 2 .

show abstract

Large-range frequency tuning of a narrow-linewidth quantum emitter

Cited by 20 publications

References 51 publications

Charge Tunable GaAs Quantum Dots in a Photonic n-i-p Diode

Charge Tunable GaAs Quantum Dots in a Photonic n-i-p Diode

Piston-Type Optical Modulator for Dynamic Thermal Radiation Tuning Applications

Quantum Interference of Identical Photons from Remote GaAs Quantum Dots

Contact Info

Product

Resources

About