A large lateral photovoltaic effect (LPE) has been observed in a Cu2O/Si heterojunction structure when its surface is illuminated by a laser. Moreover, with external bias voltage, the maximal LPE sensitivity can reach...
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A switchable multiwavelength laser with a continuously tunable spacing is proposed and illustrated based on cascaded interactions of the second harmonic and difference-frequency generations in an aperiodically poled M...
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A switchable multiwavelength laser with a continuously tunable spacing is proposed and illustrated based on cascaded interactions of the second harmonic and difference-frequency generations in an aperiodically poled MgO-doped lithium niobate （MgO：APPLN） waveguide. The wavelengths and wavelength spacings of the four outputs are continuously varied and controlled by changing the two input pump wavelengths and spacings within a 3-nm flattop bandwidth of MgO：APPLN. In addition, the switchable states of the four outputs can be selected by inputting proper powers of the two pumps. The number of output wavelengths can also be increased by choosing the proper APPLN structure, the total length of MgO：APPLN, and higher Dowers of input DumD lights.
We propose AND, NOR, and XNOR logic gates realized simultaneously for 40-Gb/s networks, in which the realization of NOR and XNOR logic gates using only MgO-doped periodically poled lithium niobate （MgO： PPLN） is re...
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We propose AND, NOR, and XNOR logic gates realized simultaneously for 40-Gb/s networks, in which the realization of NOR and XNOR logic gates using only MgO-doped periodically poled lithium niobate （MgO： PPLN） is reported. In our configuration, we exploit broadband quasi-phase matching （QPM） cascaded sec- ond harmonic and difference-frequency generation （cSHG/DFG）, cascaded sum-frequency and difference- frequency generation （cSFG/DFG） in one MgO：PPLN, and the narrow band QPM sum-frequency genera- tion （SFG） in another MgO：PPLN. The performance, including the quality-factor （Q-factor） and extinction ratio （ER）, of the proposed multifunctional logic device is also simulated.
A large lateral photovoltaic effect (LPE) has been observed in a Cu2O/Si heterojunction structure when its surface is illuminated by a laser. Moreover, with external bias voltage, the maximal LPE sensitivity can reach...
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A large lateral photovoltaic effect (LPE) has been observed in a Cu2O/Si heterojunction structure when its surface is illuminated by a laser. Moreover, with external bias voltage, the maximal LPE sensitivity can reach up to 1114 mV/mm, which is almost 10 times larger compared with its initial non-biased value of 113 mV/mm. We ascribe this phenomenon mainly to the effect of the increased photo-generated holes caused by the bias. Giant output voltage and high sensitivity suggest the potential of Cu2O nano-films could be used in a wide variety of applications for position-sensitive photodetectors.
We demonstrate polarization-based binary all-optical logic functions,such as controlled-NOT,AND and OR gates through electro-optic Pockels effect of *** using these gates with others,Complicated Boolean calculation sh...
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We demonstrate polarization-based binary all-optical logic functions,such as controlled-NOT,AND and OR gates through electro-optic Pockels effect of *** using these gates with others,Complicated Boolean calculation should be expected.
Nanoparticles（NPs） such as Ag NPs,Au NPs,and bimetallic Au/Ag nanoalloy are of great interest for a range of applications in fields ranging from plasmonics to catalysis. In this work,plasma-assisted electrochemistry...
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Nanoparticles（NPs） such as Ag NPs,Au NPs,and bimetallic Au/Ag nanoalloy are of great interest for a range of applications in fields ranging from plasmonics to catalysis. In this work,plasma-assisted electrochemistry was applied to produce crystalline Ag NPs,well-mixed Au/Ag nanoalloy in electrolyte,and the in situ monitoring of NPs growth was incorporated into the experimental set-up,which affords a real-time information about the synthesized NPs,and capability essential for quality control of nanomaterial production, by synthesizing Ag NPs,pH value,conductivity and temperature of the eletrolyte were studied as a function of the micro-plasma current,processing time and concentration of AgNO,and the way to control the size and size distribution of Ag NPs was *** synthesizing Au/Ag nanoalloy,a novel approach was put forward to produce Au/Ag nanoalloy in absence of the harmful reducing agents such as NaBH needed for conventional colloidal chemistry method. The work shed light on the potential application of Plasma-assisted electrochemistry performed at ambient conditions（*** temperature and atmospheric pressure） as an effective,low cost,viable green alternative to nanoparticle synthesis.
作者：
石蕾田凌浩陈险峰Department of Physics
State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication SystemsShanghai Jiao Tong University
We propose an efficient method for characterizing the orbital angular momentum （OAM） of an optical vortex with a large topological charge （TC） through distinguishing the interference pattern of the non- uniformly-...
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We propose an efficient method for characterizing the orbital angular momentum （OAM） of an optical vortex with a large topological charge （TC） through distinguishing the interference pattern of the non- uniformly-distributed nmlti-pinholes using fewer pinholes. This method overcomes the limit on large TC detection by nmlti-point interferometer and can be used to probe optical vortices with arbitrary sizes. In addition, it also has potential application in measuring light beam with OAM from astronomical sources.
作者：
Songsong TangXianfeng Chen[]Department of Physics
State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems Shanghai Jiao Tong University Shanghai 200240 China
We propose a scheme to generate isolated attosecond (as) pulses by high-peak-power multicycle laser fields which is based on high-order harmonics generation (HHG) from a helium atom irradiated by a three-color femtose...
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We propose a scheme to generate isolated attosecond (as) pulses by high-peak-power multicycle laser fields which is based on high-order harmonics generation (HHG) from a helium atom irradiated by a three-color femtosecond (fs) laser field. An infrared laser acts as the driving laser and two tunable lasers act as control fields which are used to modulate the ellipticity and amplitude of the driving field respectively. With well-chosen parameters, an isolated 100 as pulse is generated with a duration of 50 fs.
We demonstrate polarization-based binary all-optical logic functions, such as controlled-NOT, AND and OR gates through electro-optic Pockels effect of PPLN. By using these gates with others, Complicated Boolean calcul...
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How to obtain a large sensitivity has been a central issue of lateral photovoltaic effects (LPEs) since it had been discovered many decades ago. This work reports a colossal LPE in a nanolayer Ti and TiO 2 modulated ...
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How to obtain a large sensitivity has been a central issue of lateral photovoltaic effects (LPEs) since it had been discovered many decades ago. This work reports a colossal LPE in a nanolayer Ti and TiO 2 modulated metal-oxide-semiconductor (MOS) structure of Ti/TiO 2 /Si. The obtained 169 mV/mm sensitivity in this structure represents currently the highest level compared with previously reported results of 700 μV/mm-60 mV/mm in any other systems. The results indicate this MOS structure can be used as novel position-sensitive detectors with high sensitivity.
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