All-angle polarization-insensitive negative refraction in high-dielectric photonic crystal

Zaremanesh, Mansour; Noori, Mina

doi:10.1364/ao.58.005631

Cited by 7 publications

(8 citation statements)

References 31 publications

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“…According to tables 1-3, the bandwidth increases regarding PINR property over larger incidence angles. However, to make a comparison with previous studies, the results of the hole-type honeycomb structure investigated in [29] has been considered. In [29], the PINR with a bandwidth of 5% has been reported for incidence angles over ±23°, hence, the obtained results for almost equal conditions are summarized in table 3.…”

Section: Hole-type Diagonal Array Pcmentioning

confidence: 99%

“…The rod-type structure presented AANR in a bandwidth of 23% for TM polarization and the hole-type structure provided polarization insensitivity in a bandwidth of 5% for incident angles larger than ±23° [28]. Recently, the all-angle PINR has been reported in square lattice PC by using high dielectric material in a bandwidth of 2.4% [29]. Also, a highly efficient subwavelength imaging has been demonstrated in hexagonal lattice PC for mid-IR applications [30].…”

Section: Introductionmentioning

confidence: 99%

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Large-angle polarization insensitive negative refraction in the diagonal array photonic crystal

Zaremanesh¹,

Noori²

2019

Phys. Scr.

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In this article, the all-angle and polarization insensitive negative refraction (NR) properties are investigated in a 2D diagonal array photonic crystal. The rod-type structure presents the all-angle NR for TM 2 in a bandwidth of Δω/ω c ∼20%. The all-angle NR does not hold for the hole-type structure due to the overlap of the 2nd and the 3rd bands, however, the polarization insensitive negative refraction is achieved for incidence angles of over θ in =±20°in a bandwidth of Δω/ω c =10.6% in the second band. The proposed structure has been investigated using the PWE and the FDTD methods, regarding fabrication challenges in Si technology for the central operating wavelength of λ c =1550 nm.

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Section: Hole-type Diagonal Array Pcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Large-angle polarization insensitive negative refraction in the diagonal array photonic crystal

Zaremanesh¹,

Noori²

2019

Phys. Scr.

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“…Manipulation of synthetic materials such as metamaterials, phononic crystals, transformation optics, integration of surfaces and materials with a refractive index close to zero, carpet cloakings, etc., are examples of methods to achieve the cloaking 1 – 12 . The cloak can be achieved by controlling the sound (or light) flow and the phase front from microwave region to optical region using various methods such as phase control by metasurfaces, photonics and phononic crystals, unusual phenomena such as negative refraction, etc 13 – 15 . If the incident sound wave can bypass the object and is not penetrable and be able to remove the scattered sound, we will have the cloaking phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Multilayer acoustic invisibility cloak based on composite lattice

Zaremanesh

Bahrami

2022

Sci Rep

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A concentric cylindrical cloak is showed here to achieve the acoustic cloaking phenomenon. The introduced structure consists of MNE layers and water in MNE substrate in the MHz frequency range. Due to avoiding the incoming acoustic waves by the shell, the object can be hidden inside the cylindrical area of any shape. In order to improve the quality of cloaking, we have optimized the desired shell by considering the manufacturing technology. We show that an optimized, acoustic cloak based on composite lattice structure can reduce the scattering of an object more than a 20-layer realization of acoustic cloak based on multilayer cylindrical structure. This design approach can substantially simplify the fabrication of cloaking shells. In this research, to study the acoustic distribution of the desired structure, finite element method (FEM) has been used to analyze the structure in two dimensions and a cloak of natural materials with isotropic properties has been designed using effective medium theory.

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“…[ 1 ] PCs are periodic arrangements of macroscopic dielectric materials that provide photonic bandgap (PBG) characteristics besides various dispersion anomalies leading to super‐prism, negative refraction, slow light, and self‐collimation (SC) phenomena. [ 2–4 ] So far, interesting and highly efficient devices based on PCs have been reported in sensing, imaging, cloaking and invisibility, and energy harvesting. [ 5–8 ] One of the major fields of applications is devoted to sensor design by PCs and diverse sensors have been reported for temperature, pressure, pH, humidity, and refractive index (RI) which find potential applications in healthcare, automation, defense, security, food quality control, and environment.…”

Section: Introductionmentioning

confidence: 99%

Self‐Collimation and Slow Light‐Based Refractive Index Sensor with a Large Detection Range

2021

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In this study, a refractive index sensor based on self‐collimation and slow light is presented which operates in the Mid‐IR range (4 µm < λ < 4.133 µm). Here, the square and hexagonal arrays are merged as the background platform and the sensing area, respectively to provide self‐collimation and slow light properties. Three sensors based on slow‐light and self‐collimation are presented in detail which provide Q‐factor, sensitivity, and detection range of 227, 104 nm RIU−1, and 1–1.7, respectively in the best case. Furthermore, the sensor design based on self‐collimation and photonic bandgap phenomena in the background platform and the sensing area, respectively is presented with a single detection unit. The presented sensors are capable of gas or liquid detection with refractive indices in the range of 1–2 with enhanced Q‐factor and sensitivity of over 620 and 123, respectively.

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All-angle polarization-insensitive negative refraction in high-dielectric photonic crystal

Cited by 7 publications

References 31 publications

Large-angle polarization insensitive negative refraction in the diagonal array photonic crystal

Large-angle polarization insensitive negative refraction in the diagonal array photonic crystal

Multilayer acoustic invisibility cloak based on composite lattice

Self‐Collimation and Slow Light‐Based Refractive Index Sensor with a Large Detection Range

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