Optical Nonlinearity in Photonic Glasses

Tanaka, Keiji

doi:10.1007/978-0-387-29185-7_44

Cited by 22 publications

(28 citation statements)

References 70 publications

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“…This concept was applied by Tanaka [2,7] to non-crystalline solids. It has been demonstrated that the optical gap energy Eg is a decisive parameter determining nonlinear optical properties of optical glasses.…”

Section: Non-linear Kramers-kronig Relationsmentioning

confidence: 98%

“…In the low-frequency limit (w----> O), the asymptotic far from the bandgap value of n2 can be evaluated by using (2). Near two-photon bandgap in the spectral range ,1, > 2,1, g (,1, g is the bandgap wavelength), dispersion of n2 is described in accordance with the model of anharmonic oscillator [4]: (5) where p is a fitting parameter depending on the glass composition.…”

Section: 0mentioning

confidence: 99%

“…Far from the absorption edge, the magnitude of the third-order nonlinear susceptibility in amorphous semiconductors is similar to that in the corresponding crystals [2]. Several semi-empirical relationships have been proposed for nonlinear optical constants n2 (nonlinear refraction coefficient) and �(n) (n-photon nonlinear absorption coefficient).…”

Section: Introductionmentioning

confidence: 98%

“…Calculated spectral dependencies of: a) real and imaginary part of the third-order nonlinear susceptibility X ( 3 ) (WI; WI.W2,-(2) (a.u.) in a simple two-band system, reproduced from[4]; b) coefficients of linear (a) and nonlinear (�) absorption, linear (no) and nonlinear (n2) refraction in direct-gap (solid) and indirect-gap (dashed) crystalline semiconductors versus the photon energy, reproduced from[2].…”

mentioning

confidence: 99%

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Nonlinear optical properties of amorphous semiconductors

Романова

Melnikov

Kuzutkina

et al. 2012

2012 International Conference on Mathematical Methods in Electromagnetic Theory

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Section: Non-linear Kramers-kronig Relationsmentioning

confidence: 98%

Section: 0mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

mentioning

confidence: 99%

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Nonlinear optical properties of amorphous semiconductors

Романова

Melnikov

Kuzutkina

et al. 2012

2012 International Conference on Mathematical Methods in Electromagnetic Theory

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“…Chalcogenide glasses (ChG), on the other hand, have suitable softening characteristics due to their amorphous nature [25]. Furthermore ChG are ideal candidates for various applications in photonic systems because of their wide transparency window from the visible to mid-IR region [26,27], high optical nonlinearities [28,29], high refractive indices [30,31], photosensitivity [32,33], and large photothermal figure-of-merit [34,35]. The novelty of our approach lies in two aspects: firstly, we take the advantage of the low deposition temperature and amorphous nature of highrefractive-index ChG alloys to enable monolithic fabrication of HIC photonic devices on a variety of substrate materials [36,37].…”

Section: Introductionmentioning

confidence: 99%

Demonstration of high-performance, sub-micron chalcogenide glass photonic devices by thermal nanoimprint

et al. 2014

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High-index-contrast optical devices form the backbone of densely integrated photonic circuits. While these devices are traditionally fabricated using lithography and etching, their performance is often limited by defects and sidewall roughness arising from fabrication imperfections. This paper reports a versatile, roll-to-roll and backend compatible technique for the fabrication of high-performance, high-index-contrast photonic structures in composition-engineered chalcogenide glass (ChG) thin films. Thin film ChG have emerged as important materials for photonic applications due to their high refractive index, excellent transparency in the infrared and large Kerr non-linearity. Both thermally evaporated and solution processed As-Se thin films are successfully employed to imprint waveguides and micro-ring resonators with high replicability and low surface roughness (0.9 nm). The micro-ring resonators exhibit an ultra-high quality-factor of 4 × 10 5 near 1550 nm wavelength, which represents the highest value reported in ChG micro-ring resonators. Furthermore, sub-micron nanoimprint of ChG films on non-planar plastic substrates is demonstrated, which establishes the method as a facile route for monolithic fabrication of high-index-contrast devices on a wide array of unconventional substrates.

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High‐Performance, High‐Index‐Contrast Chalcogenide Glass Photonics on Silicon and Unconventional Non‐planar Substrates

Zou

Zhang

Lin

et al. 2014

Advanced Optical Materials

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This paper reports a versatile, roll-to-roll and backend compatible technique for the fabrication of high-index-contrast photonic structures on both silicon and plastic substrates. The fabrication technique combines low-temperature chalcogenide glass film deposition and resist-free singlestep thermal nanoimprint to process low-loss (1.6 dB/cm), sub-micron single-mode waveguides with a smooth surface finish using simple contact photolithography. Using this approach, the first chalcogenide glass micro-ring resonators are fabricated by thermal nanoimprint. The devices exhibit an ultra-high quality-factor of 4 × 10 5 near 1550 nm wavelength, which represents the highest value reported in chalcogenide glass micro-ring resonators. Furthermore, sub-micron nanoimprint of chalcogenide glass films on non-planar plastic substrates is demonstrated, which establishes the method as a facile route for monolithic fabrication of high-index-contrast devices on a wide array of unconventional substrates.

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Optical Nonlinearity in Photonic Glasses

Cited by 22 publications

References 70 publications

Nonlinear optical properties of amorphous semiconductors

Nonlinear optical properties of amorphous semiconductors

Demonstration of high-performance, sub-micron chalcogenide glass photonic devices by thermal nanoimprint

High‐Performance, High‐Index‐Contrast Chalcogenide Glass Photonics on Silicon and Unconventional Non‐planar Substrates

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