An optical modulator based on a single strongly coupled quantum dot - cavity system in a p-i-n junction

Englund, Dirk; Faraon, Andrei; Majumdar, Arka; Stoltz, Nick; Petroff, P. M.; Vučković, Jelena

doi:10.1364/oe.17.018651

Cited by 21 publications

(12 citation statements)

References 32 publications

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“…This is done by measuring the transient response of the transmitted resonant laser power to modulation of the AB laser. We note that this type of modulation is different from the all-optical modulation reported in [20], where the QD shifts continuously with increasing AB laser power and the modulation is caused by the screening of the built-in electric field by photo-generated carriers. To obtain optimal modulation contrast we tune the CW laser to the dip in the cavity transmission spectrum (shown by the arrow in Figure 2 a).…”

Section: Qd Charging and Modulationcontrasting

confidence: 87%

Effect of photogenerated carriers on the spectral diffusion of a quantum dot coupled to a photonic crystal cavity

2011

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We experimentally observe the effect of photo-generated carriers on the spectral diffusion of a quantum dot (QD) coupled to a photonic crystal (PC) cavity. In this system, spectral diffusion arises in part from charge fluctuations on the etched surfaces of the PC. We find that these fluctuations may be suppressed by photo-generated carriers, leading to a reduction of the measured QD linewidth by a factor of ∼ 2 compared to the case where the photo-generated carriers are not present. This result demonstrates a possible means of countering the effects of spectral diffusion in QD-PC cavity systems and thus may be useful for quantum information applications where narrow QD linewidths are desired.

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Section: Qd Charging and Modulationcontrasting

confidence: 87%

Effect of photogenerated carriers on the spectral diffusion of a quantum dot coupled to a photonic crystal cavity

2011

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“…Collection efficiencies from microcavities have been predicted to be as high as 35% [21]. One possibility is to use QDs coupled to gated photonic crystal microcavities that are engineered for high collection efficiency [22,23]. We predict that such structures could give up to a factor of 15 improvement in the overall collection efficiency.…”

Section: (B) Since Laser Photons Followmentioning

confidence: 97%

Quantum-Dot-Spin Single-Photon Interface

2010

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Using background-free detection of spin-state-dependent resonance fluorescence from a single-electron charged quantum dot with an efficiency of 0.1%, we realize a classical single spin-photon interface where the detection of a scattered photon with 300 ps time resolution projects the quantum dot spin to a definite spin eigenstate with fidelity exceeding 99%. The bunching of resonantly scattered photons reveals information about electron spin dynamics. High-fidelity fast spin-state initialization heralded by a single photon enables the realization of quantum information processing tasks such as nondeterministic distant spin entanglement. Given that we could suppress the measurement backaction to well below the natural spin-flip rate, realization of a quantum nondemolition measurement of a single spin could be achieved by increasing the fluorescence collection efficiency by a factor exceeding 10 using a photonic nanostructure.

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“…While the majority of PCs are static structures, providing enhanced extraction characteristics that cannot be changed, several methods have been investigated to produce mechanically or optically tunable PC structures through adjustment of refractive index via application of external electric [24,25] or magnetic fields [26,27], including incorporating a PC into a P-I-N junction [28], or adjusting the PC period through mechanical stress [29][30][31][32][33]. Reconfigurable photonic structures have also been demonstrated with phase change materials [34] and nanomechanical metamaterials [35].…”

Section: Introductionmentioning

confidence: 99%

Quantum dot emission modulation using piezoelectric photonic crystal MEMS resonators

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Gao

et al. 2017

Opt. Express

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Quantum dots (QDs) integration into photonic devices requires varied approaches to control and modulate their emission. We demonstrate voltage-tunable PC structures with integrated QDs over suspended piezoelectric aluminum nitride thin film resonators that modulate PC enhancement at MHz frequencies. When the piezoelectric device is actuated at its resonant mechanical frequency, the extracted QD emission direction is likewise modulated via the optical resonant frequency of the PC. Modulation uses nanometer-scale mechanical displacements, offering the potential for greater switching speed and improved mechanical robustness that is not subject to the effects of stiction with a scalable fabrication approach.

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An optical modulator based on a single strongly coupled quantum dot - cavity system in a p-i-n junction

Cited by 21 publications

References 32 publications

Effect of photogenerated carriers on the spectral diffusion of a quantum dot coupled to a photonic crystal cavity

Effect of photogenerated carriers on the spectral diffusion of a quantum dot coupled to a photonic crystal cavity

Quantum-Dot-Spin Single-Photon Interface

Quantum dot emission modulation using piezoelectric photonic crystal MEMS resonators

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