UROP Proceedings 2010-11

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Department of PhysicsNear-Field Scanning Optical MicroscopeAdvisor : DU Shengwang / PHYSStudent : HONG Lijia / PHYS-PM(UROP1000, Summer 2011)In this project, we have designed and fully developed a wide band integral phase-frequencylocking controller for external cavity diode lasers at 780 nm and obtained a narrow laser linewidth below 1 MHz. Meanwhile, we also developed a Labview software for the near-fieldscanning optical microscope to control piezoelectric stage’s motion and detectphotoluminescence from ZnO nano wires.405nm Laser SystemAdvisor : DU Shengwang / PHYSStudent : XU Huansu / PHYS-PM(UROP1100, Summer 2011)Laser diode has been playing an increasingly important role since the last two decades. Itcould be used in projectors, telecommunication, medical diagnostics as well as otherelectronic equipment. In this UROP project, I designed and developed a “low cost” narrowline width laser diode system at 405nm. I have learned the working principle of laser diode,grating, as well as current control and temperature control. Also, I have mastered thetechniques of assembling apparatus, soldering electronic devices, setting up the system aswell as designing experiments to modify the performance of the system. Most importantly, Ihave learned to know the essence of research and a good habit as an experimental physicist.Quantum State Calculation of Two-dimensional SupramolecularNanostructuresAdvisor : LIN Nian / PHYSStudents : CUI Hang / PHYS(UROP1000, Summer 2011)YANG Ji / PHYS-PM & COMP(UROP1000, Summer 2011)When a periodic potential is imposed at the surface, it will modify the surface electrondispersion, and an energy gap will appear at the zone boundaries. Scanning tunnelingmicroscopy can detect this phenomenon by measuring local density of states. Alternatively, asuitable MATLAB program can simulate this physical system by numerically solving the 2DSchrödinger equation. Hence, a practical solution would be designing a MATLAB programfor the two dimensional hexagonal structure potential well. However, discrepancy occursbetween the simulation results and the experimental datum in some cases. In this project, wefirst use different approaches to modify the MATLAB program and test it in one dimensionalcase, and then compare the results with existing simulations. We have verified the validity ofthe algorithm.17
Organic Molecular Beam Deposition in Ultra-high VacuumAdvisorCo-AdvisorStudents: LIN Nian / PHYS: TANG Benzhong / CHEM: HAO Xiaotian / PHYS-PP(UROP1100, Summer 2011)MITSUI Atsushi / PHYS-PM(UROP1000, Summer 2011)Organic Molecular Beam Deposition is a widely used technique in preparing organic thinfilms. This project aims at investigating the thermal properties of various organic moleculesby means of organic molecular beam deposition. A crucible is used to contain differentmolecules and then put in the Organic Molecular Beam Epitaxy (OMBE). A target is alsoplaced in front of the crucible so that molecules should be found after evaporation inUltra-high Vacuum. Through UV-Spectrum analysis, the evaporation temperature of variousmolecules has been obtained.Quantum State Calculation of Two-dimensional SupramolecularNanostructuresAdvisorStudents: LIN Nian / PHYS: KWOK King Wai / PHYS & MATH(UROP1100, Fall 2010)ZHOU Tong / PHYS(UROP1100, Fall 2010)Surface electron dispersion is modified when a periodic potential is imposed at the surface,showing an energy gap at the zone boundaries. Scanning tunneling microscopy can detect thisphenomenon by measuring local density of states, while a MATLAB program can simulatethis physical phenomenon by numerically solving the Schrödinger equation in a periodicpotential well, and optimizing the model of the real case. The proposed model fitted well inthe experimental data in some cases, but discrepancy between experimental data and predictedvalues of the model occurred in other cases. In this project, the model is tested in a simplerone-dimensional case.18
Page 4 and 5: Message from the PresidentUROP is a
Page 6 and 7: School ofScience
Page 8 and 9: After a month of screening, some pu
Page 10: Water Quality Survey for Hong Kong'
Page 14 and 15: Study of Blood Cell Development usi
Page 16 and 17: Department of MathematicsSpace Orbi
Page 18 and 19: Report on Lunar Crater ProjectAdvis
Page 20 and 21: Efficient Numerical Methods for Dyn
Page 24 and 25: Kinetic Monte Carlo Simulation of S
Page 26 and 27: Random Walk on Complex Network and
Page 28 and 29: Manufacture of Photoic Crystals and
Page 30 and 31: School ofEngineering
Page 32 and 33: Techno-economic Analysis of Hydroge
Page 34 and 35: Heavy Metal Adsorption from Seawate
Page 36 and 37: Reformation of Antimicrobial Coatin
Page 38 and 39: Innovative Iron-based Process for O
Page 40 and 41: Department of Computer Science and
Page 42 and 43: An Investigation to Simplex Minimiz
Page 44 and 45: Distributive Name ServiceAdvisor :
Page 46 and 47: “Where To”: A Collaborative And
Page 48 and 49: Light Carving: Rich Object Scanning
Page 50 and 51: Sparse Matrix CompletionAdvisor : Y
Page 52 and 53: Optical Property Investigation of N
Page 54 and 55: Opto-Mechanical Oscillator with Dir
Page 56 and 57: Capture the FlagAdvisor : SHI Ling
Page 58 and 59: Building a Servo Robot SystemAdviso
Page 60 and 61: Department of Industrial Engineerin
Page 62: Digital Image Correlation Method fo
Page 65 and 66: Department of AccountingSchool of B
Page 67 and 68: Department of EconomicsThe Microeco
Page 69 and 70: Department of Information Systems,
Page 71 and 72: Financial Risk ManagementAdvisor :
Page 73 and 74:
Consumer Shopping Behavior in Inter
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Consumer NostalgiaAdvisor : HONG Ji
Page 77 and 78:
Lay Theory of ObesityAdvisor : MUKH
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Multiculturalism, Social Judgments
Page 81 and 82:
School of Humanities and Social Sci
Page 83 and 84:
China/Africa Links ProjectAdvisor :
Page 85 and 86:
Housing Policy, Home Ownership Sche
Page 87 and 88:
Psychology of HappinessAdvisor : TA
Page 89:
Facial Expressions of EmotionsAdvis
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UROP Proceedings 2010-11

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