Da Li

- Single photon level detection of C-band photons in periodically poled lithium niobate (PPLN) waveguide • Employ all-optical fiber-to-waveguide alignment and coupling with 70% coupling efficiency • Implement 62% of internal quantum conversion efficiency and record-low 81s-1 photon detection sensitivity by completely removing dark counts from ambient environment • Perform rigid analysis on the noise photon generation mechanism in support of experimental results - Terahertz generation in Gallium Phosphide (GaP) wafers by Difference Frequency Generation (DFG) • Focus 10Hz/5ns/300mW pulse from MOPO on GaP wafers and generate Terahertz detected by bolometer • Reach 40% photon conversion efficiency and observe back conversion as the number of stacking GaP plates increased from 4 to 5 - Enhanced Anti-Stokes Raman Scattering in lithium niobate waveguide • Enhance Anti-Stokes Raman signal by at least 30 times by utilizing waveguide structure • Observe multiple Raman peaks for forward and backward propagating Anti-Stokes scattering and allocate them to their corresponding TO or LO phonon branches - Nondestructive method for evaluating domain errors in PPLN waveguide using surface-emitting geometry with nanoscale resolution • Generate uniform surface-emitting second harmonics (SESH) using counter-propagating Nd:YLF pumps • Analyze far-field spatial profile of SESH to deduce domain errors within nanoscale resolution • Determine linear taper coefficient of (5.5±0.2)Å and poling depth ratio of (40±3)% - Transverse mode conversion: from higher-order to fundamental in optical fibers • Design tilted fiber bragg grating structure to realize transverse mode conversion from LP11 mode to LP01 mode in optical fiber • Realize theoretically forward transverse mode conversion efficiency of 25%

• GPA: 3.96/4.00 • RCEAS Emeritus Fellowship Award (2009), Packard Fellowship Award (2012) • Major Courses: Nonlinear Optics, Quantum Electronics, Semiconductor Lasers, Physics of Semiconductor Devices, Applied Quantum Mechanics

- Graduated with honor in materials science (semiconductors), minor in English and Chinese translation ans interpretation - President of Rye Drama Club from 2006~2007. Directed semester drama play "Tartuff" in mandarin and "Pygmalion" in English.