scholarly journals Two-wave mixing at near-infrared wavelengths using photorefractive BaTiO3.

1995 ◽  
Vol 7 (2) ◽  
pp. 97
Author(s):  
Takahiro Yoshimi ◽  
Yosuke Takeuchi ◽  
Jun Fushimi ◽  
Kazuyoku Tei ◽  
Hideshi Yokota
Keyword(s):  
Near Infrared ◽  
Wave Mixing ◽  
Two Wave Mixing ◽  
Infrared Wavelengths

Two-Wave Mixing and Self-Pumped Phase Conjugation with Photorefractive BaTiO 3 at Near-Infrared Wavelengths

1994 ◽  
Vol 11 (3) ◽  
pp. 145-148 ◽  
Author(s):  
Zhiguo Zhang ◽  
Yong Zhu ◽  
Jin Kang ◽  
Xing Wu ◽  
Qian Jiang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Phase Conjugation ◽  
Wave Mixing ◽  
Two Wave Mixing ◽  
Infrared Wavelengths

Two-wave mixing in photorefractive ion-implanted KNbO_3 planar waveguides at visible and near-infrared wavelengths

1993 ◽  
Vol 18 (8) ◽  
pp. 577 ◽  
Author(s):  
M. Zha ◽  
M. Fleuster ◽  
Ch. Buchal ◽  
D. Fluck ◽  
P. Günter
Keyword(s):  
Near Infrared ◽  
Planar Waveguides ◽  
Wave Mixing ◽  
Two Wave Mixing ◽  
Infrared Wavelengths ◽  
Ion Implanted

scholarly journals Electromechanically reconfigurable optical nano-kirigami

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Shanshan Chen ◽  
Zhiguang Liu ◽  
Huifeng Du ◽  
Chengchun Tang ◽  
Chang-Yin Ji ◽  
...  
Keyword(s):  
Near Infrared ◽  
Large Range ◽  
Three Dimensional ◽  
High Contrast ◽  
Si Substrate ◽  
High Modulation ◽  
Gold Nanostructure ◽  
Infrared Wavelengths ◽  
On Chip ◽  
Nano Electromechanical System

AbstractKirigami, with facile and automated fashion of three-dimensional (3D) transformations, offers an unconventional approach for realizing cutting-edge optical nano-electromechanical systems. Here, we demonstrate an on-chip and electromechanically reconfigurable nano-kirigami with optical functionalities. The nano-electromechanical system is built on an Au/SiO2/Si substrate and operated via attractive electrostatic forces between the top gold nanostructure and bottom silicon substrate. Large-range nano-kirigami like 3D deformations are clearly observed and reversibly engineered, with scalable pitch size down to 0.975 μm. Broadband nonresonant and narrowband resonant optical reconfigurations are achieved at visible and near-infrared wavelengths, respectively, with a high modulation contrast up to 494%. On-chip modulation of optical helicity is further demonstrated in submicron nano-kirigami at near-infrared wavelengths. Such small-size and high-contrast reconfigurable optical nano-kirigami provides advanced methodologies and platforms for versatile on-chip manipulation of light at nanoscale.

scholarly journals A Versatile Setup for Time-Resolved Functional Near Infrared Spectroscopy Based on Fast-Gated Single-Photon Avalanche Diode and on Four-Wave Mixing Laser

2019 ◽  
Vol 9 (11) ◽  
pp. 2366 ◽  
Author(s):  
Laura Di Sieno ◽  
Alberto Dalla Mora ◽  
Alessandro Torricelli ◽  
Lorenzo Spinelli ◽  
Rebecca Re ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Single Photon ◽  
Wave Mixing ◽  
Functional Near Infrared Spectroscopy ◽  
Time Resolved ◽  
Diffusive Medium ◽  
Spectroscopy System

In this paper, a time-domain fast gated near-infrared spectroscopy system is presented. The system is composed of a fiber-based laser providing two pulsed sources and two fast gated detectors. The system is characterized on phantoms and was tested in vivo, showing how the gating approach can improve the contrast and contrast-to-noise-ratio for detection of absorption perturbation inside a diffusive medium, regardless of source-detector separation.

Homodyne detection of ultrasonic surface displacements using two-wave mixing in photorefractive polymers

1999 ◽  
Author(s):  
Marvin B. Klein ◽  
Gerald D. Bacher ◽  
Anders Grunnet-Jepsen ◽  
Daniel Wright ◽  
William E. Moerner
Keyword(s):  
Wave Mixing ◽  
Homodyne Detection ◽  
Surface Displacements ◽  
Photorefractive Polymers ◽  
Two Wave Mixing

Impact of donor compensation ratio on photorefractive two–wave mixing dynamics in multiple quantum wells structures

2014 ◽  
Vol 23 (03) ◽  
pp. 1450029 ◽  
Author(s):  
Błażej Jabłoński
Keyword(s):  
Quantum Wells ◽  
Concentration Ratio ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Wave Mixing ◽  
Compensation Ratio ◽  
Mixing Dynamics ◽  
Two Wave Mixing ◽  
Charge Field ◽  
The Impact

The kind of defects and their concentration have a significant impact on photorefractive phenomena taking place within the structure of semi-insulating GaAs / AlGaAs multiple quantum wells. In this paper, the impact of donor-to-acceptor concentration ratio on the grating in photorefractive two-waves mixing was examined. The formation of the space charge field for different defect concentrations as well as different external electric field intensities are analyzed.

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