Particle swarm optimization and its application to the design of diffraction grating filters

Shokooh‐Saremi, Mehrdad; Magnusson, Robert

doi:10.1364/ol.32.000894

Cited by 156 publications

(68 citation statements)

References 8 publications

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“…3(a), the Q-factor of a type-II resonance is very sensitive to small changes in HG parameters, while its resonance wavelength is relatively insensitive. Thus, after finding several high-Q candidate parameter sets from a coarse scanning of parameters, several runs using particle swarm optimisation (PSO) technique [28] were performed around each candidate set to find the local solution that gives the highest possible Q-factor. Without resorting to the use of PSO, very fine-resolution scan are required due to the sensitiveness of the Q-factor, demanding significant computational efforts.…”

Section: High-q Resonances In a Hybrid Grating Structurementioning

confidence: 99%

Ultracompact resonator with high quality-factor based on a hybrid grating structure

Taghizadeh¹,

Mørk²,

Chung³

2015

Opt. Express

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Abstract:We numerically investigate the properties of a hybrid grating structure acting as a resonator with ultrahigh quality factor. This reveals that the physical mechanism responsible for the resonance is quite different from the conventional guided mode resonance (GMR). The hybrid grating consists of a subwavelength grating layer and an un-patterned high-refractive-index cap layer, being surrounded by low index materials. Since the cap layer may include a gain region, an ultracompact laser can be realized based on the hybrid grating resonator, featuring many advantages over high-contrast-grating resonator lasers. The effect of fabrication errors and finite size of the structure is investigated to understand the feasibility of fabricating the proposed resonator. 4337-4340 (2014). 15. S. S. Wang and R. Magnusson, "Theory and applications of guided-mode resonance filters," Appl. Opt. 32(14), 2606-2613 (1993). 16. M. G. Moharam, D. A. Pommet, E. B. Grann, and T. K. Gaylord, "Stable implementation of the rigorous coupledwave analysis for surface-relief gratings: enhanced transmittance matrix approach," J.

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Section: High-q Resonances In a Hybrid Grating Structurementioning

confidence: 99%

Ultracompact resonator with high quality-factor based on a hybrid grating structure

Taghizadeh¹,

Mørk²,

Chung³

2015

Opt. Express

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“…Here, a narrowband filter based on leaky-mode resonance is designed with the particle swarm optimization (PSO) technique and its transmittance is determined [11]. Figure 1 shows the structural details of the device.…”

Section: Resonance Device Classesmentioning

confidence: 99%

Tunable Leaky-Mode MEMS Filters for Multispectral Imaging Applications

Magnusson

Shokooh‐Saremi

2008

2008 IEEE Aerospace Conference

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When an incident electromagnetic wave is properly coupled to a waveguide's leaky eigenmode by a subwavelength grating, a guided-mode resonance takes place. This phenomenon can manifest itself as sharp, high quality resonances in the reflection spectra. Since these resonances are highly sensitive to the device structural parameters (-grating thickness, period, and filling factor), a tunable resonance can be implemented if one or more of these parameters are suitably varied. In this paper, the micro-electro-mechanical system (MEMS) concept is applied for tuning the spectral response of resonant filters through mechanical microscale alteration of the grating profile. We provide numerical solutions based on exact electromagnetic models of MEMS-tuned resonance gratings designed with common materials. Computed results for an example tunable element with 6.0 pm period and 2.4 pm thickness show MEMS tuning of 3.4 pm in the -9-12 pm band with -100 nm resonance linewidth. These elements are promising candidates for MWIR (3-8 ptm) and LWIR (8-15 ptm) multispectral imaging applications.

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“…The structure is normally illuminated by a monochromatic plane wave and then highly reflected in the zeroth-order. In this letter, rigorous coupled-wave analysis (RCWA) for multilayered grating structures [13]- [15] associated with the particle swarm optimization (PSO) method [16] is adopted to design and optimize the structure. The PSO strategy is a global, readily implemented optimization technique that can handle different optimization problems.…”

Section: Introductionmentioning

confidence: 99%

A Multilayer-Based High-Performance Multisubpart Profile Grating Reflector

Hou

et al. 2010

IEEE Photon. Technol. Lett.

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Abstract-In this letter, a multilayer-based high-performance subwavelength multisubpart profile grating reflector (MPGR) is proposed and fabricated. The properties of the reflector are investigated by rigorous coupled-wave analysis for multilayered grating structures. It is shown that with the properly configured profile and strongly modulated grating layer in transverse-electric polarized wave, the MPGR experimentally demonstrates a broadband reflection spectrum from 1.56 to 1.8 m, very high reflectivity ( 97%), and good angular insensitivity of about 27.8 .

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Particle swarm optimization and its application to the design of diffraction grating filters

Cited by 156 publications

References 8 publications

Ultracompact resonator with high quality-factor based on a hybrid grating structure

Ultracompact resonator with high quality-factor based on a hybrid grating structure

Tunable Leaky-Mode MEMS Filters for Multispectral Imaging Applications

A Multilayer-Based High-Performance Multisubpart Profile Grating Reflector

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