Wounds in time: the aesthetic afterlives of the Cultural Revolution

My dissertation, ???Wounds in Time: the Aesthetic Afterlives of the Cultural Revolution,??? departs from the traditional historicist approach to the Cultural Revolution, contributing instead an investigation of the Cultural Revolution through its aesthetic afterlives. This study crosses disciplines and seeks to grasp the traumatic traces embedded within works of literature, art, and cinema that deal with the Cultural Revolution consciously or unconsciously, in lucidity or encryption. My analysis of the Cultural Revolution as a traumatic wound endeavors to bring the concealed political crimes, disavowed pains and absent feelings into historical consciousness. Figures central to this study include writers Han Shaogong, Yu Hua, and Hong Ying, artist Zhang Xiaogang, as well as filmmakers Jia Zhangke and Jiang Wen. Drawing on classical theory of trauma by Freud as well as works by subsequent theorists such as Nicholas Abraham and Maria Torok, Cathy Caruth and Dominick LaCapra, I maintain that the Cultural Revolution is not a fixed temporal entity but a phantom that stretches beyond history, finding contemporary cultural avenues of expression, and rematerializing to demand recognition and reparation. Further, by means of bringing trauma theory into a new historical/cultural context, this study translates/revises trauma theory beyond its Eurocentric provenance

Nanoscale Nucleation and Growth of Non-Stoichiometric V-Shaped InP Defect in Heterogeneous InGaAsP/InP Array

Nanotechnology is a broad field that involves the manipulation of atoms and molecules. For nanophotonics, defect formation in nanostructured compound semiconductor system is of great technological interest. In this paper, we study the nanoscale nucleation and growth of V-shaped defect in the heterogeneous InGaAsP/InP array. We have observed that the nucleation originated from the phosphorus-deficient disordering that was likely induced by reactive ion etching. During the nucleation, the phosphorus-deficient In1+xP1-x compound was developed at the trench. The triangular nano-precipitates of In1+xP1-x with sizes of 20-30nm were formed. The ratio of In to P in the non-stoichiometric compound was higher in the upper portion of the V-defect, likely due to antisite defect mechanism. During the defect growth process, the phosphorus-deficient nucleation site expanded to form open, inverted pyramid with sidewalls following the crystallographic planes

Study on single pass all optical wavelength converter based on cascaded second order nonlinearity with double conversion configuration

Conference Name:2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011. Conference Address: XianNing, China. Time:April 16, 2011 - April 18, 2011.IEEE Consumer Electronics SocietyIn this paper, the comparison of theoretical analysis and numerical simulation in conversion efficiency, bandwidth, frequency difference and multichannel propagation are expatiated distinctly according to the conversion principle and structure model of SP-cSHG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Second Harmonic Generation and Difference Frequency Generation with Double Conversion Configuration) and SP-cSFG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Sum Frequency Generation and Difference Frequency Generation with Double Conversion Configuration). Furthermore, it is pointed out that the structure model of SP-cSFG+DFG-DC-AOWC will be an ideal one due to its characteristics and advantages in conversion efficiency, bandwidth, frequency difference and multichannel propagation. ? 2011 IEEE

Study on the characteristics of single pass all optical wavelength converter based on cascaded second harmonic generation and difference frequency generation with double conversion configuration

Conference Name:2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011. Conference Address: XianNing, China. Time:April 16, 2011 - April 18, 2011.IEEE Consumer Electronics SocietyIn this paper, theoretical analysis and numerical simulation are expatiated distinctly according to the conversion principle and structure model of SP-cSHG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Second Harmonic Generation and Difference Frequency Generation with Double Conversion Configuration) relative to SP-cSHG+DFG-DC-AOWC (Single Pass All Optical Wavelength Converter Based on Cascaded Second Harmonic Generation and Difference Frequency Generation with Single Conversion Configuration). For SP-cSHG+DFG-DC-AOWC compared with SP-cSHG+DFG-SC-AOWC, the formula about total conversion efficiency (and total normalized conversion efficiency) is demonstrated detailedly, the characteristics and advantages in waveguide length and wave power are discussed deeply, and the methods and measures to get relatively higher conversion efficiency are given concretely. ? 2011 IEEE

Study on the characteristics of all optical wavelength converter based on cascaded sum frequency generation and difference frequency generation with double conversion configuration in contrast to the one with single conversion configuration

Conference Name:2013 International Conference on Information and Communication Technology for education, ICTE 2013. Conference Address: Singapore. Time:December 1, 2013 - December 2, 2013.Atlantis Press; et al; Hong Kong Education Society; Information Engineering Research Institute, USA; Trans Tech Publications inc.; WIT Transactions on Information and Communication TechnologiesIn this paper, in contrast to SP-cSFG+DFG-SC-AOWC, for SP-cSFG+DFG- DC-AOWC, the characteristic description of total conversion efficiency which is affected by waveguide length, signal wavelength, pump wavelength, wave power, and pump pulse width is discussed clearly, the advantages in total conversion efficiency are demonstrated confirmedly. Based on some particular comparison of characteristics description, both the common points and the uncommon points for the converter with similar conversion principle and similar conversion configuration are clarified obviously. ? 2014 WIT Press

Granadilla-Inspired Structure Design for Conversion/Alloy-Reaction Electrode with Integrated Lithium Storage Behaviors

Conversion/alloy-reaction electrode materials promise much higher energy density than the commonly used ones based on intercalation chemistries. However, the low electronic conductivity and, specially, the large volume expansion upon lithiation hinder their practical applications. Here, for the first time, a unique granadilla-inspired structure was designed to prepare the conversion/alloy-reaction anode of carbon coated tin/calcium tin oxide (C@void@Sn/CaSnO3) ternary composite. The granadilla-inspired structure ensures the intimate contact between the Sn/CaSnO3 nanoparticles and the carbon matrix, providing not only conductive networks for electron transport and a short distance for Li+ diffusion but also effective space for the electrode volume expansion toward conversion/alloy reaction. Moreover, the unique structure possesses abundant solid-solid interfaces between the three components as well as solid-liquid interfaces between nanoparticles and electrolyte, contributing to a large percent (58%) of interfacial charge (thus capacity). The integration of alloy-reaction, conversion-reaction, and interfacial lithium storage endows the hybrid electrode with a high capacity and long cycling life, holding great promise for next-generation high-capacity lithium-ion batteries

Variable wavelength conversion based on fan-out grating in QPM-LN - art no 67820F

Conference Name:Conference on Optoelectronic Materials and Devices II. Conference Address: Wuhan, PEOPLES R CHINA. Time:NOV 02-05, 2007.In this paper, we demonstrated for the first time variable 1.5 mu m wavelength conversion through cascaded second order nonlinear processes "SHG+DFG" by fan-out grating in lithium niobate waveguide. We fabricated the waveguide by annealed proton exchange in periodically poled LiNbO3 (PPLN). The device used in this experiment is 4 cm long, has a QPM period from 14.8 mu m to 15.2 mu m, waveguide width of 12 mu m, proton exchange depth of 0.7 mu m, and was annealed for 32h at 350 degrees C. After proton exchange in pure benzoic acid using a SiO2 mask, the substrate was annealed in an oxygen atmosphere. The wavelength of signal light was set at 1551.3 nm. The wavelengths of tunable pump lights we used in experiment were 1543.2 and 1556.2 nm, and the corresponding grating periods were 14.87 mu m and 15.03 mu m, respectively. The temperature was set at 100.5 degrees C to avoid photo refractive damage and to match the QPM peaks to the pump wavelengths. The conversion efficiency was about 10dB to be expected with the pump power 175mW in a similar device with a slightly different QPM period and operated at 125 degrees C

Recirculating configuration all-optical wavelength conversion by self-phase modulation in a highly nonlinear photonic crystal fiber - art no 678155

Conference Name:Conference on Passive Components and Fiber-Based Devices IV. Conference Address: Wuhan, PEOPLES R CHINA. Time:NOV 02-05, 2007.A novel architecture of all-optical wavelength conversion in a highly nonlinear bismuth oxide-based photonic crystal fiber (PCF) is demonstrated. Self-phase modulation is utilized to induce spectral broadening for the all-optical wavelength converter. A recirculating configuration is designed to obtain the twice spectral broadening. Therefore, wavelength conversion is achieved. The design and the simulation of PCF are demonstrated. The desired dispersion properties can be tailored by the parameters of bismuth oxide (Bi2O3) PCF microstructure. The propagation loss at 1550nm is about 0.8dB/m. The simulation results of PCF indicate the relationship of the effective index of the fundamental mode, the mode effective area and the holes pitch of PCF. The nonlinear coefficient is expected to be 1100W(-1)km(-1) by using bismuth oxide-based glass and reducing the effective core area. The mode-field diameter of PCF is estimated to be 1.98 mu m and the predicted small effective core area is 3.3 mu m(2). The design of Bi2O3-based PCF and the intermediate high numerical aperture fibers between Bi2O3-based PCF and single-mode fibers are considered to reduce the splicing loss. The obtained results show that the wavelength converter has a potential of wide conversion bandwidth, high response time, simple configuration and low insertion loss etc

Double-conversion optical frequency shifter using multiple quasi-phase-matched LiNbO3 waveguides - art no 67833U

Conference Name:Conference on Optical Transmission, Switching and Subsystems V. Conference Address: Wuhan, PEOPLES R CHINA. Time:NOV 02-05, 2007.In this paper, we proposed a variable operation of a DC-OFS based on double SFG+DFG (Double-SFG+DFG-OFS) nonlinearity process for the first time. We studied the principle and configuration of three DC-OFS in detail both theoretically and experimentally. In order to compare with Double-DFG-OFS and Double-SHG+DFG-OFS, we also used two four-channel-controlling multiple-quasi-phase-matched LiNbO3 wavelength converters and got ten different outputs spreading across a wavelength range of as broad as 35 nm by changing the combination of two controlling wavelengths of the two wavelength converters. And one channel signal was converted to shorter and longer wavelength and the same wavelength by changing the controlling wavelengths. We got higher conversion efficiency compared with the other two DC-OFSs mentioned above. We used novel M-QPM-LN wavelength converters having a continuously-phase-modulated domain structure, which can be operated by multiple pump wavelengths with minimum loss of efficiency. The periods were 14.8 mu m. The phase of the periodic poling was continuously modulated to satisfy the QPM condition at four different wavelengths. The frequency spacing of control signal-b is twice as large as the control signal-a. The operating temperatures were 102.5 and 100.5 C for the first and the second QPM-LN wavelength converters, respectively