Spin-based single-photon transistor, dynamic random access memory, diodes, and routers in semiconductors

Hu, C. Y.

doi:10.1103/physrevb.94.245307

Cited by 40 publications

(21 citation statements)

References 107 publications

(260 reference statements)

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“…Instead of classical optics, quantum optics provides a tool to control photon propagation, including electromagnetically induced transparency (EIT) [27][28][29], optical non-reciprocity [30][31][32] and chirality [33][34][35][36][37][38]. Light propagating in a "moving" Bragg lattice created in atoms is subject to a "macroscopic" Doppler effect and has demonstrated non-reciprocity [39][40][41].…”

mentioning

confidence: 99%

Cavity-Free Optical Isolators and Circulators Using a Chiral Cross-Kerr Nonlinearity

2018

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Optical nonlinearity has been widely used to try to produce optical isolators. However, this is very difficult to achieve due to dynamical reciprocity. Here, we show the use of the chiral cross-Kerr nonlinearity of atoms at room temperature to realize optical isolation, circumventing dynamical reciprocity. In our approach, the chiral cross-Kerr nonlinearity is induced by the thermal motion of N-type atoms. The resulting cross phase shift and absorption of a weak probe field are dependent on its propagation direction. This proposed optical isolator can achieve more than 30 dB of isolation ratio, with a low loss of less than 1 dB. By inserting this atomic medium in a Mach-Zehnder interferometer, we further propose a four-port optical circulator with a fidelity larger than 0.9 and an average insertion loss less than 1.6 dB. Using atomic vapor embedded in a on-chip waveguide, our method may provide chip-compatible optical isolation at the single-photon level of a probe field.

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confidence: 99%

Cavity-Free Optical Isolators and Circulators Using a Chiral Cross-Kerr Nonlinearity

2018

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“…The previous works about optical transistor and other optical devices mainly are limited to one DOF case [79][80][81][82][83][84]. In this paper, we designed compact quantum circuits for determinately implementing single photon hyper-transistor, hyper-router and hyper-DRAM, respectively.…”

Section: Discussionmentioning

confidence: 99%

Hyperparallel transistor, router and dynamic random access memory with unity fidelities

Liu,

Chen,

Liu

et al. 2021

Preprint

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We theoretically implement some hyperparallel optical elements, including quantum single photon transistor, router, and dynamic random access memory (DRAM). The inevitable side leakage and the imperfect birefringence of the quantum dot (QD)-cavity mediates are taken into account, and unity fidelities of our optical elements can be achieved. The hyperparallel constructions are based on polarization and spatial degrees of freedom (DOFs) of the photon to increase the parallel efficiency, improve the capacity of channel, save the quantum resources, reduce the operation time, and decrease the environment noises. Moreover, the practical schemes are robust against the side leakage and the coupling strength limitation in the microcavities.

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“…The spin-based high-gain and high-speed PT/SPT and related devices discussed above can be made in parallel based on giant circular birefringence (GCB) in another type of spin-cavity unit with a double-sided microcavity8586. In both cases, the maximum transistor gain could reach ~10 5 in the state-of-the-art pillar microcavity depending on the QD-cavity coupling strength and the spin coherence time.…”

Section: Discussionmentioning

confidence: 99%

Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity

2017

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The future Internet is very likely the mixture of all-optical Internet with low power consumption and quantum Internet with absolute security guaranteed by the laws of quantum mechanics. Photons would be used for processing, routing and com-munication of data, and photonic transistor using a weak light to control a strong light is the core component as an optical analogue to the electronic transistor that forms the basis of modern electronics. In sharp contrast to previous all-optical tran-sistors which are all based on optical nonlinearities, here I introduce a novel design for a high-gain and high-speed (up to terahertz) photonic transistor and its counterpart in the quantum limit, i.e., single-photon transistor based on a linear optical effect: giant Faraday rotation induced by a single electronic spin in a single-sided optical microcavity. A single-photon or classical optical pulse as the gate sets the spin state via projective measurement and controls the polarization of a strong light to open/block the photonic channel. Due to the duality as quantum gate for quantum information processing and transistor for optical information processing, this versatile spin-cavity quantum transistor provides a solid-state platform ideal for all-optical networks and quantum networks.

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Spin-based single-photon transistor, dynamic random access memory, diodes, and routers in semiconductors

Cited by 40 publications

References 107 publications

Cavity-Free Optical Isolators and Circulators Using a Chiral Cross-Kerr Nonlinearity

Cavity-Free Optical Isolators and Circulators Using a Chiral Cross-Kerr Nonlinearity

Hyperparallel transistor, router and dynamic random access memory with unity fidelities

Photonic transistor and router using a single quantum-dot-confined spin in a single-sided optical microcavity

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