Design of an ultracompact low-power all-optical modulator by means of dispersion engineered slow light regime in a photonic crystal Mach–Zehnder interferometer

Bakhshi, Sara; Moravvej-Farshi, Mohammad Kazem; Ebnali-Heidari, Majid

doi:10.1364/ao.51.002687

Cited by 24 publications

(8 citation statements)

References 40 publications

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“…In practical applications, as the light-matter interactions rely on the strength of the interaction between the optical field and the material, many nonlinear phenomena will be enhanced under the presence of slow light, which allows us to design miniaturized and high-sensitive devices based on this field enhancement [114][115][116]. In 2012, F. Hosseinibalam et al [117] proposed a slow light assisted PCC for ultracompact, low power, and high-sensitive biosensor.…”

Section: Slow Light Assisted Pccmentioning

confidence: 99%

A review for optical sensors based on photonic crystal cavities

Zhang

Zhao

2015

Sensors and Actuators A: Physical

178

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This review covers photonic crystal cavities (PCCs) and their applications in optical sensors, with a particular focus on the structures of different PCCs. For each kind of optical sensor, the specific measurement principle, structure of PCC, and the corresponding sensing properties are all presented in detail. The summary of the reported works and the corresponding results demonstrate that it is possible to realize miniature and high-sensitive optical sensors due to the ultra-compact size, excellent resonant properties, and flexibility in structural design of PCCs. Finally, the key problems and new directions of PCCs for sensing applications are discussed.

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Section: Slow Light Assisted Pccmentioning

confidence: 99%

A review for optical sensors based on photonic crystal cavities

Zhang

Zhao

2015

Sensors and Actuators A: Physical

178

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“…5 Initiating from the discovery of the photonic band gap in 1987 by Yablonovitch 6 and John, 7 slow light Photonic Crystal Waveguides (PCWs) has showed much potenstial as a possible platform for time-domain processing of optical signal and spatial compression of optical energy. [10][11][12] However, the issue of large insertion losses due to large group index mismatch between strip waveguides and the slow light PCW needs to be addressed before the integration of several slow light PCW devices is feasible. [10][11][12] However, the issue of large insertion losses due to large group index mismatch between strip waveguides and the slow light PCW needs to be addressed before the integration of several slow light PCW devices is feasible.…”

Section: Introductionmentioning

confidence: 99%

Efficient coupling to slow light photonic crystal waveguide

2016

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Slow light photonic crystal waveguides (PCWs) have been the subject of intensive study due to their potential for on-chip applications such as optical buffers and the enhancement of nonlinear phenomenon. 1 However, due to high group velocity mismatch between the strip waveguide and the slow light waveguide efficient coupling of light is challenging. The coupling efficiency is also very sensitive to the truncation at the interface between the two waveguides. 2 This sensitivity can be removed and light can efficiently be coupled from the strip waveguide to the slow light waveguide by adding an intermediate photonic crystal waveguide (or coupler) that operates at a group index of ∼ 5. Several designs have been proposed for couplers to obtain higher coupling efficiency within the desired group index range. 3 We have studied uniaxial stretched couplers in which the lattice constant is stretched in the direction of propagation by 10-50 nm in the coupler region. Using a Finite Difference Time Domain (FDTD) Simulation Method that allows the extraction of the group index, 4 we have observed 8.5 dB improvement in the coupling efficiency at the group index of 30. Efficient coupling is dominantly determined by the band edge position of the coupler region and maximum transmission efficiency is limited by the maximum transmission of the coupler PCW. If the band edge of coupler PCW is sufficiently red shifted relative to the band edge of the slow light PCW then higher coupling efficiency can be achieved.

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“…Optofluidic infiltration technology has many advantages such as the ability to be tuned, flexible, and reconfigured. In particular, it is a key technology for applications such as nonlinear enhancement in photonic devices [37], optical switches [38], and channel drop filters [39].…”

Section: Introductionmentioning

confidence: 99%

“…Cargille optical liquids with high refractive indices from 1.30 to 2.31 at specific intervals of 0.005 and 0.002 refractive index units are promising alternatives as optical fluids for infiltration [41]. Specifically, these liquids find application in nonlinear Kerr effects in slow-light PCWs [38]. It has been demonstrated both theoretically and experimentally that optimizing slow-light performance can be achieved by choosing one [30,42] and two [43] kinds of liquid infiltration.…”

Section: Introductionmentioning

confidence: 99%

Wideband slab photonic crystal waveguides for slow light using differential optofluidic infiltration

et al. 2015

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A new type of wideband slow light with a large delay bandwidth product in a slab photonic crystal waveguide with a triangular lattice of circular air holes in a silicon-on-insulator substrate based on optofluidic infiltration is demonstrated. It is shown that dispersion engineering through infiltrating optical fluids-with different refractive indices n(1f) and n(2f)--in the first two rows of the air holes innermost to the waveguide results in an improved normalized delay bandwidth product ranging from 0.187 to 0.377 with large bandwidth (12 nm<Δλ<32 nm) and group index (14.20< n(g)< 24.62) around 1550 nm. The nearly zero group velocity dispersion on the order of 10-(20) s(2)/m is achieved in all of the structures. These results are obtained by numerical simulation based on a three-dimensional-plane-wave expansion method.

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Design of an ultracompact low-power all-optical modulator by means of dispersion engineered slow light regime in a photonic crystal Mach–Zehnder interferometer

Cited by 24 publications

References 40 publications

A review for optical sensors based on photonic crystal cavities

A review for optical sensors based on photonic crystal cavities

Efficient coupling to slow light photonic crystal waveguide

Wideband slab photonic crystal waveguides for slow light using differential optofluidic infiltration

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