Avoided-crossing-based liquid-crystal photonic-bandgap notch filter

Noordegraaf, Danny; Scolari, Lara; Lægsgaard, Jesper; Alkeskjold, Thomas Tanggaard; Tartarini, Giovanni; Borelli, Elena; Bassi, Paolo; Li, Jun; Wu, Shin‐Tson

doi:10.1364/ol.33.000986

Cited by 65 publications

(28 citation statements)

References 11 publications

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“…Additionally, optical properties of silica-air PCFs can be extended by filling the cladding air holes with materials such as liquid crystal [2], semiconductor [3], or metal [4], etc. In metal-filled PCFs, surface plasmon polaritons (SPPs) can form on the metal wires [5], and the core guided light can be coupled with SPPs when the phases of them match.…”

Section: Introductionmentioning

confidence: 99%

Polarization characteristics of photonic crystal fibers selectively filled with metal wires into cladding air holes

Akira¹,

Saitoh²,

Koshiba³

2011

Opt. Express

138

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Abstract:We numerically investigate the polarization characteristics of photonic crystal fibers selectively filled with metal wires into cladding air holes, through a full-vector modal solver based on the finite-element method (FEM). Firstly, we investigate the fundamental coupling properties between the core guided light and surface plasmon polaritons (SPPs) excited on the surface of metal wire. Secondly, we show that we can obtain highly polarization-dependent transmission characteristics in PCFs by introducing several metal wires closely aligned into the cladding, and reveal the strongly polarization-dependent coupling properties between the core guided modes and the SPP supermodes, which consist of discrete SPP modes. Finally, we show the importance of arranging the metal wires close to each other for high polarization-dependence.

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Section: Introductionmentioning

confidence: 99%

Polarization characteristics of photonic crystal fibers selectively filled with metal wires into cladding air holes

Akira¹,

Saitoh²,

Koshiba³

2011

Opt. Express

138

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“…The notch in the transmission spectrum is caused by a cladding mode crossing through the band gap, forming a so-called "avoidedcrossing" with the core mode of the band gap. 12 When an electric field is applied to the LCPBG fiber, the LC reorients depending on the direction and strength of the applied voltage. Using four electrodes it is possible to control the direction of the electric field in the transversal direction with different electrode configurations ͑ECs͒ corresponding to three directions of the electric field ͑EC1: 0°, EC2: 45°, and EC3: 90°͒ as the dotted lines in Fig.…”

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confidence: 99%

Tunable and rotatable polarization controller using photonic crystal fiber filled with liquid crystal

Wei

Alkeskjold

Bjarklev

2010

Applied Physics Letters

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We design and fabricate a compact tunable and rotatable polarization controller using liquid crystal photonic band gap fibers. The electrically and thermally induced phase shift in the Poincaré sphere and corresponding birefringence change are measured. The direction of the electric field is managed by connecting four electrodes in different electrode configurations, and the thermal tunability is controlled by on-chip heaters. According to the results, a quarter-wave plate and a half-wave plate working in the wavelength range of 1520–1600 nm are experimentally demonstrated.

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“…Sharper features that can be measured with higher accuracy and still follow large shifts in wavelength with changes in effective index can be introduced using additional resonant features, be it anti crossings with higher order modes [7], or more readily using long period gratings (LPGs) [8][9][10]. LPGs are periodic corrugations of the refractive index or geometry of a fiber, with periodicity A much larger than the wavelength (typically hundreds of micrometers) (Fig.…”

Section: Long Period Gratingsmentioning

confidence: 99%