Xu Ke-shu

Cancer Institute (WIA)

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Tie-Qi Chen

Chifeng Municipal Hospital

Sui Zhan

Institute of Plasma Physics

Ruibo Lu

Harbin Engineering University

Xiao Sheng-an

Fudan University

Yanjun Liu

Shandong University

Zhongjing Xing

Fudan University Shanghai Cancer Center

Guo Jian-hua

Astronomy and Space

LV RUI-BO

Fudan University Shanghai Cancer Center

Shuyan Zhang

University of Groningen

Shuyan Zhang

Zhengzhou University

Cooperative Institutions

Fudan University

Southeast University

Ministry of Education of the People's Republic of China

Chinese Academy of Sciences

Southeast University

Fudan University Shanghai Cancer Center

Cancer Institute (WIA)

Nanjing Xiaozhuang University

Suzhou Municipal Hospital

East China University of Science and Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Molecular orientation and color alternation of surface stabilized ferroelectric liquid crystal cell

Acta Physica Sinica (Overseas Edition) (1996)

Xiao Sheng-an Tie-Qi Chen Xu Ke-shu

Molecular orientation configurations across zig-zag defects and thin-line defects of the surface stabilized ferroelectric liquid crystal (SSFLC) cell are presented. The transmission spectra of the SSFLC cell of non-uniform states are numerically calculated using the asymmetric chevron structure model. The calculations agree well with experimental results, which confirms the continuity of the N-director across the chevron interface. The color alternation of the SSFLC cell between crossed polarizers is well explained.

Polarizer

Alternation (linguistics)

Chevron (anatomy)

Crystal (programming language)

10.1088/1004-423x/5/4/003

Cite

Citations (0)

Some Improvements on the GS Algorithm in Phase Retrieval Problem

Fudan xuebao. Ziran Kexue ban (2000)

Xu Ke-shu

Usually GS algorithm falls into a state of local minimum when it is used to resolve the phase retrieval problem. In order to avoid this disadvantage, a new algorithm based on the GS algorithm has been designed, which uses a parameter λ to create a weighted average of the intermediate calculated results and then gives a new initial phase condition. Therefore the initial phase condition can be switched quickly and randomly to overcome this disadvantage. Several examples provided show the efficiency of the newly designed algorithm.

Disadvantage

Source

Cite

Citations (0)

Characteristics of phase-only modulation using a reflective liquid crystal on si licon device

Acta Physica Sinica (2003)

Aiming Ge Sui Zhan Xu Ke-shu

This paper discusses the characteristics of phase-only modulation using a reflec tive liquid crystal on silicon(LCOS). The 2×2 Jones matrix method is used as a computational tool to theoretically analyze phase modulation characteristics. Th e system has been constructed for testing of amplitude and phase, in which a He- Ne laser as the light source, testing the wave front phase using an interferomet er. The LCOS displays as a liquid crystal spatial light modulator and its drivin g circuit is controlled by a computer, digital data are sampled by CCD. We have tested the phase modulation of 1024×768 LCOS displays. Given the state of input and output polarizations ,the result of testing our theories by experiment sho w consistency ,so LCOS displays can be used as phase-only modulator.

Spatial light modulator

Modulation (music)

Digital micromirror device

10.7498/aps.52.2481

Cite

Citations (11)

Preparation of stripe-shaped domain structure in ferroelectric liquid crystal and the fabrication of spatial light modulator

Acta Physica Sinica (Overseas Edition) (1999)

Ruibo Lu Xu Ke-shu Shuyan Zhang Guiling Xiang Zhongjing Xing

The stripe-shaped domain (SSD) structure was prepared in the initial ferroelectric liquid crystal (FLC) alignment without the application of an external electric field, which was realized by the aligning layer modification through the doping of tin tetra-2, 4-dimethyl phenoxy phthalocyanine (SnPc) into the rubbed polyimide films. Atomic force microscopy was used to investigate the alignment films and the corresponding aligning ability was evaluated through the pre-tilt angle measurement. The memory capability and the contrast ratio of thus aligned SSFLC cells have been enhanced and improved with the appearance of the SSD structure. The electrically controlled 64 × 64 FLC spatial light modulator was fabricated using the improved aligning method, which proves valuable for the practical device fabrication.

Spatial light modulator

10.1088/1004-423x/8/9/006

Cite

Citations (1)

THE ALIGNMENT EFFECT OF NAPHTHALOCYANINE LB FILMS ON LIQUID CRYSTALS

Acta Physica Sinica (1999)

LV RUI-BO Xu Ke-shu Shuyan Zhang Jianhua Gu Zuhong Lu

Bis (trimethylsiloxy) silicon naphthalocyanine (SiNc) LB films were fabricated to align nematic liquid crystals. Films obtained under different surface pressures exhibit different alignment effects. Films obtained under surface pressure of 15mN/m will induce a planar alignment, while those obtained under 30mN/m will induce a homeotropic alignment. Atomic force microscopy reveals that on films prepared under high surface pressure the SiNc molecules stack into separate monomers or aggregates to form lines of nanometer size with molecular macrocycles perpendicular to the surface of the film and the dipping direction of its formation. In addition, there are grooves of molecular size between the stacked SiNc molecular lines. Similar formation occurs in films prepared under low surface pressures, only instead of molecules all lying perpendicular to the surface, many SiNc molecules are lying obliquely to the film surface or even lying on the surface. The mechanism of the liquid crystal alignment is also discussed.

Sinc function

Homeotropic alignment

Crystal (programming language)

10.7498/aps.48.2289

Cite

Citations (1)

Electro-optical properties of holographic polymer dispersed liquid crystal devices

Acta Physica Sinica (2004)

Bin Zhang Yanjun Liu Xu Ke-shu

Holographic polymer dispersed liquid crystals（HPDLC）are a kind of novel photoelectronic information functional materials. It has the perfect characters including high diffraction efficiency, rapid response and easy manufacture. HPDLC devices are potentially useful for optical communication, panel display, information storage and integrated optics. Based on the study of the diffraction properties optimization of HPDLC，we have established the measurement system for electro-optical properties of the HPDLC device. The influence of different surfactants loading on the anchoring energy of liquid crystal have been explored, which was demonstrated to be a good way to decrease the operating voltage. The experimental results indicated that the index matching plays an important role in improving the contrast ratio of device. The response time was measured and the average response time of 100μs was obtained.

Diffraction efficiency

Contrast ratio

Response time

10.7498/aps.53.1850

Cite

Citations (6)