All-optical tunable filters based on optomechanical effects in two-dimensional photonic crystal cavities

Zheng, Yaoxian; Yu, Quanqiang; Tao, Keyu; Ouyang, Zhengbiao

doi:10.1364/ol.38.004362

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…Integrated optical devices based on photonic crystals (PhCs) are a promising platform for high density integration of devices which significantly enhance light-matter interaction [ 1 – 3 ]. In recent years, a wide variety of applications have been proposed and demonstrated, including optical switches [ 4 , 5 ], light emitting diodes [ 6 ], lasers [ 7 , 8 ], all-optical logic gates [ 9 , 10 ], filters [ 11 , 12 ], power splitters [ 13 , 14 ] and highly efficient modulators [ 15 – 17 ]. In particular, PhC microcavities of various architectures have attracted significant interests in molecule sensing due to their compact size, low detect limit (DL) and high sensitivity ( S ) [ 18 – 24 ], thus far, 1D PhC [ 20 , 25 , 26 ], 2D PhC [ 27 – 29 ], L3 cavities [ 30 ], slot waveguides [ 24 ], ring cavities [ 31 – 33 ], have been studied widely for sensing, since the size of PhC sensors are approximately three orders of magnitude less than commercial integrated-optic sensors [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Design Low Crosstalk Ring-Slot Array Structure for Label-Free Multiplexed Sensing

Huang

Tian

Zhou

et al. 2014

Sensors

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We theoretically demonstrate a low crosstalk ring-slot array structure used for label-free multiplexed sensing. The proposed sensors array is based on an array of three ring-slot and input/output line defect coupling waveguides. Each ring-slot cavity has slightly different cavity spacing and different resonant frequency. Results obtained using two dimensional finite-difference time-domain (2D-FDTD) simulation indicate that the resonant frequencies of each sensor unit in response to the refractive index variations are independent. The refractive index sensitivity is 134 ~ 145.5 nm/RIU (refractive index unit) and the Q factors more than 10 4 can be achieved. The calculated detect limit lower than 1.13 × 10 −4 RIU is obtained. In addition, an extremely small crosstalk lower than −25.8 dB is achieved among the array of three ring-slot cavities. The results demonstrate that this multiplexed sensor array is a promising platform for integrated optical devices and enables highly parallel label-free detection.

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Section: Introductionmentioning

confidence: 99%

Design Low Crosstalk Ring-Slot Array Structure for Label-Free Multiplexed Sensing

Huang

Tian

Zhou

et al. 2014

Sensors

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“…The refractive index change can be realized based Research Article on the fast free carrier plasma dispersion effect on Si [18], and the position can be controlled based on optomechanical effects through MEMS [19,20].…”

Section: Research Articlementioning

confidence: 99%

Dual-wavelength filters based on two-dimensional photonic crystal degenerate modes with a ring dielectric rod inside the defect cavity

Zhong²,

Wang

et al. 2015

Appl. Opt.

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A tunable dual-wavelength filter based on degenerate modes with a ring dielectric rod inside the single point defect cavity is proposed. The band structures and mode profiles are computed by the plane-wave expansion method. The normalized transmission spectra for this structure are investigated by using the two-dimensional finite-difference time-domain method. The two orthogonal output modes of the filter can be regarded as the combination of the original degenerate cavity modes and both excited due to the introduced perturbation rod. The influences of the perturbation rod on the localized modes, band separations, and the tuning ranges are all investigated and analyzed based on the perturbation theory. With the ring dielectric rod being introduced into the defect, a narrower wavelength bandwidth and a wider wavelength tuning range can be obtained, which are superior to that of the filter based on a cavity with a larger radius rod. Besides, the perturbation rod can also be used for splitting degenerate modes for multiwavelength filters. The proposed filter has a simple structure and may be potentially applied in various integrated circuits, such as multiwavelength filters.

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“…Nowadays, in order to build on-chip all-optical systems, it is urgent to realize integrated tunable all-optical filters [18]- [20]. To the best of our knowledge, there have been limited research efforts in terms of silicon all-optical filters.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth and Wavelength Tunable All-Optical Filter Based on Cascaded Opto-Mechanical Microring Resonators

et al. 2019

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We propose and experimentally demonstrate an all-optical filter with tunable bandwidth and wavelength based on cascaded opto-mechanical microring resonators (MRRs). As the transmission of each MRR could be tuned by injecting resonance powers, the total transmission of the three cascaded MRRs could be manipulated to realize tunable all-optical filters. Due to the free-hanging waveguides of the opto-mechanical MRRs, the nonlinear effects in the device are efficiently enhanced, which contribute to reduce the resonance powers. In the experiment, the bandwidth and wavelength tunability of the optical filter have been demonstrated by injecting three resonance powers. The tuning efficiencies of the filter's 3 dB bandwidth and wavelength could reach 0.233 nm/mW and 0.043 nm/mW respectively, which benefit the construction of all-optical systems with low-power consumptions. The footprint of the compact device is 0.02 mm 2 . The proposed tunable optical filter is competent to process optical signals with dominant advantages of high tuning efficiencies, all-optical control, compact footprint, and complementary metal-oxide semiconductor-compatibility, which has significant applications for on-chip all-optical systems.

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All-optical tunable filters based on optomechanical effects in two-dimensional photonic crystal cavities

Cited by 10 publications

References 17 publications

Design Low Crosstalk Ring-Slot Array Structure for Label-Free Multiplexed Sensing

Design Low Crosstalk Ring-Slot Array Structure for Label-Free Multiplexed Sensing

Dual-wavelength filters based on two-dimensional photonic crystal degenerate modes with a ring dielectric rod inside the defect cavity

Bandwidth and Wavelength Tunable All-Optical Filter Based on Cascaded Opto-Mechanical Microring Resonators

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