Highly tunable photonic crystal filter for the terahertz range

Němec, H.; Kužel, Petr; Duvillaret, Lionel; Pashkin, A.; Dressel, Martin; Mt, Sebastian

doi:10.1364/ol.30.000549

Cited by 131 publications

(56 citation statements)

References 23 publications

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“…Using such electrically controllable thin films would considerably enhance the operation speed and performance of highly tunable photonic crystal filters as recently reported in Ref. 12.…”

mentioning

confidence: 86%

Dielectric tunability of SrTiO3 thin films in the terahertz range

Kužel

Kadlec

Němec

et al. 2006

Applied Physics Letters

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We have developed an interdigited electrode structure for applying a static electric field to a ferroelectric thin film, which enables nearly full transmission of a perpendicularly polarized terahertz wave. This approach has been used to determine the electric field dependence of the complex permittivity of a SrTiO3 thin film on a sapphire substrate up to about 2THz employing time-domain terahertz spectroscopy. We have demonstrated up to 10% variation of the film permittivity at 300GHz at room temperature induced by an applied electric field of 100kV∕cm. No dielectric dispersion is observed between 1MHz and about 500GHz. The field-induced changes are attributed to soft mode hardening.

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“…Using such electrically controllable thin films would considerably enhance the operation speed and performance of highly tunable photonic crystal filters as recently reported in Ref. 12.…”

mentioning

confidence: 86%

Dielectric tunability of SrTiO3 thin films in the terahertz range

Kužel

Kadlec

Němec

et al. 2006

Applied Physics Letters

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“…PhCs have many attractive characteristics such as photonic bandgap (PBG), localization effect, and refraction effect. By introducing point defect and/or line defect, PhC-based devices can be made [2], such as PhC-based waveguide [3][4][5], nanocavity [6][7][8], low threshold lasers [9][10][11][12], PhC-based filter [13][14][15], PhC fibers [16][17][18][19], optical sensors, and so on.…”

Section: Introductionmentioning

confidence: 99%

A high sensitivity pressure sensor based on two-dimensional photonic crystal

et al. 2016

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Abstract:In this paper, we propose and simulate a pressure sensor based on two-dimensional photonic crystal with the high quality factor and sensitivity. The sensor is formed by the coupling of two photonic crystal based waveguides and one nanocavity. The photonic crystal with the triangular lattice is composed of GaAs rods. The detailed structures of the waveguides and nanocavity are optimized to achieve better quality factor and sensitivity of the sensor. For the optimized structures, the resonant wavelength of the sensor has a linear redshift as increasing the applied pressure in the range of 0 -2 GPa, and the quality factor keeps unchanged nearly. The optimized quality factor is around 1500, and the sensitivity is up to 13.9 nm/GPa.

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“…Once components are fabricated or structures are fixed, the filtering characteristics of these SPP filters will be unchangeable. To overcome these disadvantages, a mechanical tunable THz filter 16,17 and a thermal tunable THz filter 18 have been reported, which are known as active components.…”

Section: Introductionmentioning

confidence: 99%

Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides

Zhang

et al. 2013

AIP Advances

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A highly tunable terahertz (THz) filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides is proposed and demonstrated numerically by means of the Finite Element Method. The results reveal that a sharp peak with high Q-value presents in the band gap of Bragg grating waveguide with a defect, and the position of the sharp peak can be modified greatly by changing the intensity of the transverse magnetic field applied to the device. Compared to the situation without magnetic field applied, the shift of the filtered frequency (wavelength) reaches up to 36.1 GHz (11.4 μm) when 1 T magnetic field is applied. In addition, a simple model to predict the filtered frequency and an effective way to improve the Q-value of the filter are proposed by this paper

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Highly tunable photonic crystal filter for the terahertz range

Cited by 131 publications

References 23 publications

Dielectric tunability of SrTiO3 thin films in the terahertz range

Dielectric tunability of SrTiO3 thin films in the terahertz range

A high sensitivity pressure sensor based on two-dimensional photonic crystal

Highly tunable Terahertz filter with magneto-optical Bragg grating formed in semiconductor-insulator-semiconductor waveguides

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