All-Optical Switching of Silicon Nanobeam Cavities with an Ultra-compact Heater Utilizing the Photothermal Effect

Dong, Penghui; Zhang, Long; Dai, Daoxin; Shi, Yaocheng

doi:10.1021/acsphotonics.1c01364

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…We believe that investigating the photothermal effects that are convenient for suppressing the Brownian fluctuations of the microlever [29,52] and quantum ground state cooling of a mechanical resonator [31] can facilitate the development of cavity-based experiments that rely on high sensitivity. Recent advances in the development of a photothermal effects-based all-optical switch with ultrahigh tuning efficiency [57] may result in a functionally integrated component that can be employed in a broad range of efficient all-optical control applications. Moreover, despite the fact that photothermal forces are dissipative forces, it has been shown that a strong coupling strength can improve optomechanical entanglement [58].…”

Section: Discussionmentioning

confidence: 99%

Photothermally-Induced Nonlinearity in a Quantum Multimode Optical System

Akhtar¹

2023

Preprint

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Similar to radiation pressure, photothermal effects connect the optical path length to an intracavity field, resulting in nonlinear behavior of the resonator due to thermal effects. Here, we theoretically investigate the nonlinear optics that emerge as a result of photothermal effects in a multimode optical system composed of two cavity modes coupled via hopping coefficient and with two mechanical modes through coupling rates. We report single to double photothermally-induced transparency (PTIT) dips, and a single sharp photothermally-induced absorption (PTIA) peak, and demonstrate that photothermal and strong coupling coefficients can suppress this phenomenon. Moreover, we observe Fano resonances in the absorption profile by monitoring probe transmission in the off-resonant configuration of the transparency phenomenon. The dynamics of group delay or advance are investigated in the range of transparency such that a sharp dip can assist in achieving slow light for a longer time. Using appropriate experimental parameters, our proposed work can pave the way for future practical applications in quantum information processing based on multimode interactions.

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Section: Discussionmentioning

confidence: 99%

Photothermally-Induced Nonlinearity in a Quantum Multimode Optical System

Akhtar¹

2023

Preprint

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“…In addition, a silica cladding layer between the silicon waveguides and the metallic micro-heaters is usually needed to avoid light absorption caused by the metal, which also limits the heating efficiency. As a result, numerous strategies to enhance heating efficiency have been proposed, including transparent graphene nano-heaters 3 , suspended waveguide structures 4 , and photothermal effects 5 . Among these schemes, all-optically TO tunable devices as an alternative have attracted increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Ultra-high-efficiency tunable silicon photonic filter

Cao

Dai

2023

SPIE-CLP Conference on Advanced Photonics 2022

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Optical tunable filters play a key role in silicon photonic integrated circuits. Highly energy-efficient tunability and a wide continuous tuning range are strongly desired for silicon photonics filters. All-optically thermo-optic (TO) tunable devices based on the light absorbers integrated close to the silicon structure as localized heaters have attracted increasing attention because optical heaters, compared with electrical ones, can greatly reduce thermal loads and heat leakage for the device. They provide a new approach to implementing high-efficiency TO tuning with a fast response. In this work, we propose and experimentally demonstrate an on-chip all-optically tunable filter based on a suspended silicon microdisk resonator with an ultra-compact optical heater, which is a platinum absorber deposited directly on the top of the ridge waveguide. Attributed to the novel optical pumping scheme, ultra-small device size, and suspended waveguide structure, an ultra-high tuning efficiency of 37.70 nm/mW is achieved. Only 1.405 mW pump power is required to tune the single-resonance filter over a wide spectral range of ∼54.5 nm. The demonstrated tunable optical filter has the advantages of high tuning efficiency, compact footprint, and simple fabrication processes, which has significant applications for on-chip all-optical systems.

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“…O PTICAL switch, as the key component, has been widely researched and applied on reconfigurable optical add-drop multiplexing (ROADM) and optical cross connection (OXC) systems [1]- [3]. Several optical switches have been demonstrated on different platforms, including silicon-on-insulator (SOI) [4]- [8], silicon nitride (SiN) [9]- [11], silica-based planar lightwave circuits (PLCs) [12]- [16] and polymer-based PLCs [17]- [20]. The low loss waveguide and high coupling efficiency contribute silica-based switch is commercially available and can provide up to 32 ports switching with a fiber-to-fiber loss of 6.6 dB [21].…”

Section: Introductionmentioning

confidence: 99%

Low Power Consumption Polymer/Silica Hybrid Thermo-Optic Switch Based on Racetrack Resonator

Yin

Yao

et al. 2022

IEEE Photonics J.

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Large scale integration of photonics devices requires low power consumption devices. In this paper, we demonstrate a low power consumption polymer/silica hybrid thermo-optic switch based on racetrack resonator. With the high index-contrast between SU-8 core, silica buffer and PMMA cladding, a compact racetrack resonator with a small bending radius of 120 µm and a coupling length of 1765 µm is fabricated through simple and lowcost contact lithography technology. An extinction ratio of 16.83 dB is achieved while the power consumption applied is 14.69 mW. The energy efficiency of the switch is 12.07 pm/mW. The rise/fall time the switch is 174 µs/182 µs.

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All-Optical Switching of Silicon Nanobeam Cavities with an Ultra-compact Heater Utilizing the Photothermal Effect

Cited by 9 publications

References 27 publications

Photothermally-Induced Nonlinearity in a Quantum Multimode Optical System

Photothermally-Induced Nonlinearity in a Quantum Multimode Optical System

Ultra-high-efficiency tunable silicon photonic filter

Low Power Consumption Polymer/Silica Hybrid Thermo-Optic Switch Based on Racetrack Resonator

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