All optical control of self-pumped phase conjugation from BaTiO 3 :Co photorefractive crystal

2001 ◽  
Author(s):  
Yoshihiro Koizumi ◽  
Go Urushibata ◽  
Minoru Obara
Keyword(s):  
Phase Conjugation ◽  
Photorefractive Crystal ◽  
Optical Control ◽  
All Optical

Realizing all-optical full-adder logic operation with photorefractive crystal phase conjugation

2007 ◽  
Author(s):  
Xiuying Fan ◽  
Guohui Lv ◽  
Zuohong Jiang ◽  
Huiying Wang ◽  
Youlong Yu
Keyword(s):  
Phase Conjugation ◽  
Full Adder ◽  
Photorefractive Crystal ◽  
Crystal Phase ◽  
Logic Operation ◽  
All Optical

Ultrafast Switching Dynamics

2017 ◽  
Author(s):  
Olle Eriksson ◽  
Anders Bergman ◽  
Lars Bergqvist ◽  
Johan Hellsvik
Keyword(s):  
Lower Energy ◽  
Research Field ◽  
Optical Control ◽  
Magnetic Memory ◽  
Magnetic Media ◽  
Switching Dynamics ◽  
All Optical ◽  
Ultrafast Switching ◽  
Stored Information ◽  
Intense Research

The time-integrated amount of data and stored information, is doubled roughly every eighteen months, and since the majority of the worlds information is stored in magnetic media, the possibility to write and retrieve information in a magnetic material at ever greater speed and with lower energy consumption, has obvious benefits for our society. Hence the seemingly simple switching of a magnetic unit, a bit, is a crucial process which defines how efficiently information can be stored and retrieved from a magnetic memory. Of particular interest here are the concepts of ultrafast magnetism and all-optical control of magnetism which have in recent decades become the basis for an intense research field. The motivation is natural; the mechanisms behind these phenomena are far from trivial and the technological implications are huge.

scholarly journals Optofluidic Platform Based on Liquid Crystals in X-Cut Lithium Niobate: Thresholdless All-Optical Response

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 908
Author(s):  
Fabrizio Ciciulla ◽  
Annamaria Zaltron ◽  
Riccardo Zamboni ◽  
Cinzia Sada ◽  
Francesco Simoni ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Light Intensity ◽  
Lithium Niobate ◽  
Photovoltaic Effect ◽  
Optical Control ◽  
Crystal Layer ◽  
Liquid Crystal Layer ◽  
Threshold Behaviour ◽  
All Optical

In this study, we present a new configuration of the recently reported optofluidic platform exploiting liquid crystals reorientation in lithium niobate channels. In order to avoid the threshold behaviour observed in the optical control of the device, we propose microchannels realized in a x-cut crystal closed by a z-cut crystal on the top. In this way, the light-induced photovoltaic field is not uniform inside the liquid crystal layer and therefore the conditions for a thresholdless reorientation are realized. We performed simulations of the photovoltaic effect based on the well assessed model for Lithium Niobate, showing that not uniform orientation and value of the field should be expected inside the microchannel. In agreement with the re-orientational properties of nematic liquid crystals, experimental data confirm the expected thresholdless behaviour. The observed liquid crystal response exhibits two different regimes and the response time shows an unusual dependence on light intensity, both features indicating the presence of additional photo-induced fields appearing above a light intensity of 107 W/m2.

scholarly journals Functional THz emitters based on Pancharatnam-Berry phase nonlinear metasurfaces

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Cormac McDonnell ◽  
Junhong Deng ◽  
Symeon Sideris ◽  
Tal Ellenbogen ◽  
Guixin Li
Keyword(s):  
Amino Acids ◽  
Linear Polarization ◽  
Berry Phase ◽  
Science And Technology ◽  
Optical Control ◽  
Biomedical Science ◽  
Spin States ◽  
Single Cycle ◽  
All Optical ◽  
Thz Waves

AbstractRecent advances in the science and technology of THz waves show promise for a wide variety of important applications in material inspection, imaging, and biomedical science amongst others. However, this promise is impeded by the lack of sufficiently functional THz emitters. Here, we introduce broadband THz emitters based on Pancharatnam-Berry phase nonlinear metasurfaces, which exhibit unique optical functionalities. Using these new emitters, we experimentally demonstrate tunable linear polarization of broadband single cycle THz pulses, the splitting of spin states and THz frequencies in the spatial domain, and the generation of few-cycle pulses with temporal polarization dispersion. Finally, we apply the ability of spin control of THz waves to demonstrate circular dichroism spectroscopy of amino acids. Altogether, we achieve nanoscale and all-optical control over the phase and polarization states of the emitted THz waves.

scholarly journals All-Optical Arbitrary-Point Stable Quadruple Frequency Dissemination With Photonic Microwave Phase Conjugation

2018 ◽  
Vol 10 (4) ◽  
pp. 1-8 ◽  
Author(s):  
Haojie Wang ◽  
Xiaoxiao Xue ◽  
Shangyuan Li ◽  
Xiaoping Zheng
Keyword(s):  
Phase Conjugation ◽  
Arbitrary Point ◽  
All Optical

Photorefractive-crystal shape-parameter influence on formation of self-pumped phase conjugation

1994 ◽  
Vol 33 (14) ◽  
pp. 3135 ◽  
Author(s):  
Xuefeng Yue ◽  
Zongshu Shao ◽  
Jun Chen ◽  
Yongyuan Song ◽  
Huanchu Chen
Keyword(s):  
Shape Parameter ◽  
Phase Conjugation ◽  
Photorefractive Crystal ◽  
Crystal Shape ◽  
Parameter Influence

scholarly journals Localized All-Optical Control of Single Semiconductor Quantum Dots through Plasmon Polariton-Induced Screening

2018 ◽  
Vol 6 (15) ◽  
pp. 1800345
Author(s):  
Matt Seaton ◽  
Alex Krasnok ◽  
Allan S. Bracker ◽  
Andrea Alù ◽  
Yanwen Wu
Keyword(s):  
Quantum Dots ◽  
Semiconductor Quantum Dots ◽  
Optical Control ◽  
All Optical ◽  
Plasmon Polariton

Energy-efficient all optical wavelength converter for optical phase conjugation

2020 ◽  
Vol 58 ◽  
pp. 102278
Author(s):  
Lei Wang ◽  
Mingyi Gao ◽  
Mengli Liu ◽  
Huaqing Zhu ◽  
Bowen Chen ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Phase Conjugation ◽  
Optical Phase Conjugation ◽  
Wavelength Converter ◽  
Optical Phase ◽  
Optical Wavelength ◽  
All Optical ◽  
Optical Wavelength Converter

scholarly journals All-optical control of lead halide perovskite microlasers

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Nan Zhang ◽  
Yubin Fan ◽  
Kaiyang Wang ◽  
Zhiyuan Gu ◽  
Yuhan Wang ◽  
...  
Keyword(s):  
Optical Control ◽  
All Optical ◽  
Halide Perovskite ◽  
Lead Halide
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