A Non-Volatile Tunable Ultra-Compact Silicon Photonic Logic Gate

Peng, Zheng; Feng, Junbo; Yuan, Hongkuan; Cheng, Wei; Wang, Yan; Ren, Xiaodong; Cheng, Hao; Zang, Shengyin; Shuai, Yubei; Líu, Hao; Wu, Jiagui; Yang, Junbo

doi:10.3390/nano12071121

Cited by 11 publications

(3 citation statements)

References 57 publications

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“…Though the extinction ratio still needs to be improved, the power consumption is superior to many reported results of about tens of milliwatts [ 28 ]. This indicates the potential applications for some inverter optical switches or all-optical logic gates [ 29 , 30 ].…”

Section: Device Performance Characterizationmentioning

confidence: 99%

Optical Bistability in a Tunable Gourd-Shaped Silicon Ring Resonator

et al. 2022

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In this study, a tunable gourd−shaped ring resonator is demonstrated to generate optical bistability. The system consists of two sub−rings for a gourd shape configuration with a U−shaped wave guiding pathway. The transfer matrix method and FDTD simulation are used to acquire the spectral characteristics of the system. For the fabricated device, the spectra profile and extinction ratio can be effectively tuned by the microheater above the U−shaped waveguide, which matches with the theoretical results. Due to the gourd structure of the resonator, the light waves in two rings can be cross−coupled with each other, and the optical bistability could come out effectively with the change in the input optical power around 6 mW. The presented optical bistability devices have great application potential in optical information processing such as optical storage, switch and logic operation.

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Section: Device Performance Characterizationmentioning

confidence: 99%

Optical Bistability in a Tunable Gourd-Shaped Silicon Ring Resonator

et al. 2022

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“…Recently, phase change materials (PCMs) have been extensively investigated to tackle the challenge of miniaturizing active devices in PICs due to their unique ability to undergo reversible conversion between states and exhibit significant refractive index contrast [ 6 , 7 , 8 , 9 ]. The phase transition in PCMs can be triggered by various stimuli, including heat, electricity or optics, leading to apparent differences in their electrical and optical properties during and after the phase transition [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material

et al. 2023

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The miniaturization of optical switches is a promising prospect with the use of phase-change materials (PCMs), and exploring various strategies to effectively integrate PCMs with integrated optical waveguides represents an intriguing research question. In this study, an ultra-compact integrated optical switch based on PCM is proposed. This device consists of a Ge2Sb2Te5 nano-disk and an inverse-designed pixelated sub-wavelength structure. The pixelated sub-wavelength structure offers customized refractive indices that conventional materials or structures cannot achieve, leading to an improved insertion loss (IL) and extinction ratio (ER) performance of the device. Furthermore, this structure enhances the interaction between the optical field and GST, resulting in a reduction of the device size and the inserted GST footprint. With an ultra-compact device footprint of 0.9 µm × 1.5 µm, the simulation results exhibit a low IL of 0.45 dB, and a high ER of 18.0 dB at 1550 nm. Additionally, relevant studies show that this device is able to perform reliably despite minor variations in the manufacturing process.

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“…The device shows good suitability to be used in broad-spectral ranges due to the low absorption of dielectric materials and a stable solid layer design. In contrast to this, semiconductor material-based optical devices [59][60][61][62] have their limitations, such as high material cost and higher absorption in most of the spectral ranges, making them difficult to use and fabricate in densely populated optical integrated circuits. The proposed use of the presented optical switching device in a photonic logic circuit is shown in Figure 1b, requiring rigorous switching and amplification actions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Optical-Switching Mechanism Using Guided Mode Resonances

et al. 2022

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Recently, photonic crystals have paved the way to control photonic signals. Therefore, this research numerically investigated the design of the optical switch using the guided-mode resonances in photonic crystals operating in a communication window around 1.55 μm. The design of the device is based on a dielectric slab waveguide to make it compatible with optical waveguides in photonic circuits. Moreover, two signals are used and are termed as the data signal and control signal. The data signal is coupled into the optical waveguide using an out-of-the-plane vertical coupling mechanism, whereas the control signal is index-guided into the optical waveguide to amplify the data signal. The switching parameters of the optical switch are adjusted by changing the number of the photonic crystal periods and implementing a varying radius PhC-cavity within the middle of the PhC-lattice, where the optical characteristics in terms of resonant wavelength, reflection peaks, linewidth, and quality factor of the data signal can be adjusted. The numerical simulations are carried out in open-source finite difference time domain-based software. Congruently, 7% optical amplification is achieved in the data signal with a wavelength shift of 0.011 μm and a quality factor of 12.64. The amplification of the data signal can be utilized to implement an optical switching mechanism. The device is easy to implement and has great potential to be used in programmable photonics and optical integrated circuits.

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A Non-Volatile Tunable Ultra-Compact Silicon Photonic Logic Gate

Cited by 11 publications

References 57 publications

Optical Bistability in a Tunable Gourd-Shaped Silicon Ring Resonator

Optical Bistability in a Tunable Gourd-Shaped Silicon Ring Resonator

Inverse Design and Numerical Investigations of an Ultra-Compact Integrated Optical Switch Based on Phase Change Material

Investigation of Optical-Switching Mechanism Using Guided Mode Resonances

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