Tunable Q-factor silicon microring resonators for ultra-low power parametric processes

Strain, Michael J.; Lacava, Cosimo; Meriggi, Laura; Cristiani, Ilaria; Sorel, Marc

doi:10.1364/ol.40.001274

Cited by 35 publications

(11 citation statements)

References 21 publications

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“…Ref. [80] demonstrated that the operating point of a MRR can be controllable by employing a tunable evanescent field coupler, exhibiting a quasicontinuously Q factors between 9000 and 96 000. Burridge et al used Mach-Zehnder interferometer (MZI) based MRR to realize tunable Q factor in a similar way (Figure 2d).…”

Section: Photon Pair Sourcementioning

confidence: 99%

Advances in Chip‐Scale Quantum Photonic Technologies

Zheng

et al. 2021

Adv Quantum Tech

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Quantum photonic system has made remarkable achievements in computing and communication. Serving as quantum information carriers, photons are flying qubits and robust against decoherence, emerging as a desirable platform to make quantum processor a reality. However, with system's complexity and functionality scaling up, the requirements for stability, programmability, and manufacturability will be in high demand. Integrated photonics, compatible with complementary metal-oxide-semiconductor fabrication, has overwhelming dominance in terms of density and performance, making it an unrivaled contender for large-scale quantum information processing (QIP). To improve the performance of individual blocks and integrate them on a common substrate is one of the core tasks for a practical quantum processor. Here, the recent advances in components that constitute quantum photonic systems on silicon photonics platform, including sources, modulators, and detectors are reviewed. Burgeoning quantum photonics applications, such as multi-dimensional, multi-photon QIP and integrated quantum key distribution are highlighted.

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Section: Photon Pair Sourcementioning

confidence: 99%

Advances in Chip‐Scale Quantum Photonic Technologies

Zheng

et al. 2021

Adv Quantum Tech

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“…[1][2][3] Four-wave mixing (FWM) is an important third-order Kerr nonlinear effect in silicon for all-optical signal processing functions. [4][5][6] Various silicon photonic devices including microrings, [7][8][9] photonic crystals, [10][11][12] and 1D periodic photonic structures [13,14] have been employed to improve the FWM conversion efficiencies by enhancing the light-matter interactions using the resonant structures. [15][16][17][18][19] Although a resonant structure can significantly improve the conversion efficiency, the conversion bandwidth is inevitably limited by the cavity bandwidth or the band edge of a photonic crystal.…”

Section: Efficient and Broadband Four-wave Mixing In A Compact Silicomentioning

confidence: 99%

Efficient and Broadband Four‐Wave Mixing in a Compact Silicon Subwavelength Nanohole Waveguide

Yang

Sun

Zhang

et al. 2019

Advanced Optical Materials

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In this paper, we propose a simple yet effective scheme by using a compact silicon subwavelength nanohole waveguide, which possesses a broadband and low-loss transmission. As the subwavelength nanoholes are periodically distributed along the silicon waveguide, the optical properties of this artificial material, such as the effective refraction index, the transmittance and the dispersion, can be engineered by varying the nanohole diameter and the period. By this means, an enhanced light intensity in the silicon area can be achieved in the nanohole waveguide, leading to an efficient and broadband FWM process. The mechanism we propose in this paper is different from the slow-wave effect reported in previous papers, [13,14] which enhanced the conversion efficiencies in 1D periodic photonic structures by leveraging the large group indices near the band edges. The nonlinearity of the silicon nanohole waveguide originates from the enhanced light intensity in the nonresonant silicon waveguide, thus enabling a broadband FWM process. For the nanoholes with a diameter of 100 nm and a period of 300 nm, a FWM conversion efficiency of −26.7 dB is observed in the experiment, showing a 12.5 dB improvement compared to a conventional silicon strip waveguide. Thanks to the broadband transmission and the negligible linear dispersion of the silicon nanohole waveguide, a 3 dB conversion bandwidth of 37 nm is experimentally demonstrated, which is limited by the optical amplifiers employed in the experiment.The proposed silicon nanohole waveguide is schematically illustrated in Figure 1a, which consists of a periodic array of subwavelength nanoholes in the center of the silicon waveguide. The propagation of the light in the waveguide is studied using the 3D finite-difference time-domain (3D-FDTD) method. In Figure 1b-d, the cross-section of the silicon waveguide is 480 × 220 nm 2 and the lengths of the silicon waveguide and the nanohole segment are 60 and 50 µm, respectively. The nanohole diameter d = 100 nm is used and kept constant while the period of the nanoholes is varied. The electric field distribution of the Bloch mode is mainly trapped in the air (silicon) area with the period a = 200 nm (a = 300 nm). Based on the previous study, [21] the band edge wavelength is dependent on the nanohole period. The normalized transmission spectra with two periods and different nanohole diameters are shown in Figure 1e,f, respectively. It can be seen that the band edges in both cases are away from the operating wavelengths (C-band) with the nanohole diameters ranging from 60 to 140 nm. Small Confining light in a small volume offers an effective approach to enhance the four-wave mixing (FWM) process. Recently, most efforts are devoted to improve the conversion efficiencies by using resonant structures. As a result, the bandwidths of the FWM conversions are typically limited to 1-2 nm. In this paper, a nonresonant silicon subwavelength nanohole waveguide is proposed to manipulate the field distribution of the propagating wave. The electromagnetic...

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“…The cavity wavelength tuning mechanism used in this work is achieved by fabricating a thermal tuning element above the grating device, as shown in Figure 2a. By applying a voltage across the heater element, localized temperature variations can be applied to the device and therefore control exerted over its resonance wavelength [11,14]. The devices fabricated in this work were produced on a SOI wafer (SOITEC, Bernin, France) with a 220 nm thick silicon core.…”

Section: π-Phase Shifted Bragg Grating Design and Fabricationmentioning

confidence: 99%

“…Enhancement of the non-linear effects in waveguide devices has been achieved through both material [8] and device design. In many cases, micro-resonator devices are used to enhance the non-linear interaction for low power, compact device designs [3,[9][10][11][12]. The increased photon lifetime in the cavity and resonant enhancement of the field in a small mode volume allows for improved light-matter interaction, but additionally increases detuning effects on the resonator due to thermal refractive index variation of the resonant wavelength.…”

Section: Introductionmentioning

confidence: 99%

A Micro-Processor-Based Feedback Stabilization Scheme for High-Q, Non-Linear Silicon Resonators

Cantarella

Strain

2016

Applied Sciences

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Stabilization of silicon micro-resonators is a key requirement for their inclusion in larger photonic integrated circuits. In particular, thermal refractive index shift in non-linear applications can detune devices from their optimal working point. A cavity stabilization scheme using a micro-processor-based feedback control loop is presented based on a local thermal heater element on-chip. Using this method, a silicon π-phase shifted grating with a cavity Q-factor of 40 k is demonstrated to operate over an ambient temperature detuning range of 40 • C and injection wavelength range of 1.5 nm, nearly 3 orders of magnitude greater than the resonant cavity linewidth.

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Tunable Q-factor silicon microring resonators for ultra-low power parametric processes

Cited by 35 publications

References 21 publications

Advances in Chip‐Scale Quantum Photonic Technologies

Advances in Chip‐Scale Quantum Photonic Technologies

Efficient and Broadband Four‐Wave Mixing in a Compact Silicon Subwavelength Nanohole Waveguide

A Micro-Processor-Based Feedback Stabilization Scheme for High-Q, Non-Linear Silicon Resonators

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