Reconfigurable bandpass optical filters based on subwavelength grating waveguides with a Ge2Sb2 Te5 cavity

Badri, S. Hadi; Gilarlue, M. M.; Farkoush, Saeid Gholami; Rhee, Sang-Bong

doi:10.1364/josab.419475

Cited by 45 publications

(21 citation statements)

References 40 publications

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“…Several photonic and plasmonic apparatuses have been proposed and investigated, including on-chip optical modulators and optical switches established on PCMs [93,94]. One of the widely used PCMs in photonic apparatuses is Ge 2 Sb 2 Te 5 (GST) [95].…”

Section: Plasmonic Switchesmentioning

confidence: 99%

Optical Computing: Status and Perspectives

2022

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For many years, optics has been employed in computing, although the major focus has been and remains to be on connecting parts of computers, for communications, or more fundamentally in systems that have some optical function or element (optical pattern recognition, etc.). Optical digital computers are still evolving; however, a variety of components that can eventually lead to true optical computers, such as optical logic gates, optical switches, neural networks, and spatial light modulators have previously been developed and are discussed in this paper. High-performance off-the-shelf computers can accurately simulate and construct more complicated photonic devices and systems. These advancements have developed under unusual circumstances: photonics is an emerging tool for the next generation of computing hardware, while recent advances in digital computers have empowered the design, modeling, and creation of a new class of photonic devices and systems with unparalleled challenges. Thus, the review of the status and perspectives shows that optical technology offers incredible developments in computational efficiency; however, only separately implemented optical operations are known so far, and the launch of the world’s first commercial optical processing system was only recently announced. Most likely, the optical computer has not been put into mass production because there are still no good solutions for optical transistors, optical memory, and much more that acceptance to break the huge inertia of many proven technologies in electronics.

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Section: Plasmonic Switchesmentioning

confidence: 99%

Optical Computing: Status and Perspectives

2022

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“…PCMs show changes in electrical and/or optical properties with high-speed switching between two stable states. In recent years, several photonic and plasmonic devices such as on-chip optical modulators and optical switches based on PCMs, have been proposed [21][22][23][24][25][26] . Ge 2 Sb 2 Te 5 (GST) is one of the most commonly used PCMs in photonic devices.…”

Section: Integrated Non-volatile Plasmonic Switches Based On Phase-change-materials and Their Application To Plasmonic Logic Circuitsmentioning

confidence: 99%

Integrated non-volatile plasmonic switches based on phase-change-materials and their application to plasmonic logic circuits

Ghosh

Dhawan

2021

Sci Rep

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Integrated photonic devices or circuits that can execute both optical computation and optical data storage are considered as the building blocks for photonic computations beyond the von Neumann architecture. Here, we present non-volatile hybrid electro-optic plasmonic switches as well as novel architectures of non-volatile combinational and sequential logic circuits. The electro-optic switches consist of a plasmonic waveguide having a thin layer of a phase-change-material (PCM). The optical losses in the waveguide are controlled by changing the phase of the PCM from amorphous to crystalline and vice versa. The phase transition process in the PCM can be realized by electrical threshold switching or thermal conduction heating via external electrical heaters or the plasmonic waveguide metal itself as an integrated heater. We have demonstrated that all logic gates, a half adder circuit, as well as sequential circuits can be implemented using the plasmonic switches as the active elements. Moreover, the designs of the plasmonic switches and the logic operations show minimum extinction ratios greater than 20 dB, compact designs, low operating power, and high-speed operations. We combine photonics, plasmonics and electronics on the same platform to design an effective architecture for logic operations.

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“…Subwavelength gratings (SWGs) have been a critical component in the fabrication of viable, high-performance integrated silicon photonics devices, for instance, low-loss fiber-to-chip couplers [ 11 ], selective filters [ 12 ], modulators, sensors [ 13 , 14 ], and ultra-broadband waveguide couplers [ 15 ]. The cross-section of an SWG waveguide is equivalent to that of a ridge waveguide, but it features periodic refractive index modulation along the propagation direction of light.…”

Section: Introductionmentioning

confidence: 99%

Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications

Butt

Tyszkiewicz

Wojtasik

et al. 2022

IJMS

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The sol–gel dip-coating method is a cost-efficient way for the realization of thin films on a planar substrate. In this work, high-quality, low-loss, and low-surface roughness silica–titania thin films are deposited on a glass substrate with the sol–gel dip-coating method. This platform works in the visible to near-IR wavelength ranges and can be useful for several eye-catching photonic components. The paper is comprised of two parts: the first part deals with the development of a low-cost silica–titania waveguide system, whereas the second part provides detail on the numerical modeling of the SWG waveguide filter and SWG waveguide FP-sensor design. The SWG waveguide NIR-stopband filter can achieve an ER of >40 dB and 3-dB bandwidth of 110 nm designed at optimized parameters. The SWG waveguide-FP structure proposed in this work act as a refractive index sensor where the sensitivity is ~120 nm/RIU by reducing the width of the waveguide. This sensitivity can be further enhanced by reducing the waveguide height. We believe that this work is quite important for the realization of low-cost integrated photonic devices based on the silica–titania platform developed via the sol–gel dip-coating method.

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Reconfigurable bandpass optical filters based on subwavelength grating waveguides with a Ge₂Sb₂ Te₅ cavity

Cited by 45 publications

References 40 publications

Optical Computing: Status and Perspectives

Optical Computing: Status and Perspectives

Integrated non-volatile plasmonic switches based on phase-change-materials and their application to plasmonic logic circuits

Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications

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