Photonic engineering of terahertz quantum cascade lasers by Liang, Guozhen

“…First, we report the design, fabrication and experimental characterization of surface-emitting THz frequency QCLs with distributed feedback concentric-circular-gratings (CCG) for beam engineering to achieve a narrow beam divergence. …”
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Dynamic trapping and manipulation of biological cells with optical tweezers by Sun, Dong, Hu, Songyu., Cheah, Chien Chern, Li, Xiang

“…Current control techniques for optical tweezers work only when the cell is located in a small neighbourhood around the centroid of the focused light beam. Therefore, the optical trapping fails when the cell is initially located far away from the laser beam or escapes from the optical trap during manipulation. …”
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Investigations into high resolution imaging of the aqueous outflow system and cornea by Hong, Jesmond Xun Jie

“…This thesis in this context aims to investigate the potential of Bessel beam and light sheet fluorescence microscopy for ocular disease diagnosis. …”
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Flexible single-mode delivery of a high-power 2  μm pulsed laser using an antiresonant hollow-core fiber by Lee, Elizabeth, Luo, Jiaqi, Sun, Biao, Ramalingam, Vincent, Zhang, Ying, Wang, Qijie, Yu, Fei, Yu, Xia

“…The effect of bending on the fiber output power and beam profile is also investigated. The Gaussian-like output beam profile is maintained up to a 7.5 cm bending radius. …”
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Localized transverse flow measurement with dynamic light scattering line-scan OCT by Han, Le, Tan, Bingyao, Schmetterer, Leopold, Bizheva, Kostadinka

“…The new approach allows for separation of the flow velocity component along the line-illumination direction of the imaging beam from other orthogonal velocity components, from particle diffusion motion, and from noise-induced distortion in the OCT signal's temporal autocorrelation. …”
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Dynamic measurement by multi-point laser Doppler vibrometer by Chang, Haoming.

“…A vibration measurement of a cantilever beam using a multi-point laser Doppler vibrometer (LDV) with single detector is conducted in this dissertation. …”
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Graphene metamaterials for intense, tunable, and compact extreme ultraviolet and X-ray sources by Pizzi, Andrea, Rosolen, Gilles, Wong, Liang Jie, Ischebeck, Rasmus, Soljačić, Marin, Feurer, Thomas, Kaminer, Ido

“…For 5 MeV electrons, a metamaterial of 50 layers and length 50 µm, and a beam current of 1.7 µA, it is, for instance, possible to generate X-rays of intensity 1.5 × 107 photons sr-1 s-1 1%BW, 580 times more than for a single-layer design. …”
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Temporal and Spatial Variations of the Solar Radiation Observed in Singapore by Jayaraman, Ramkumar, Maskell, Douglas Leslie

“…Meteorological phenomena, such as fast moving clouds, cause rapid changes in the terrestrial direct beam radiation. This introduces transients in both the temporal and spatial measurements of global horizontal radiation. …”
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Integrated photonic devices for realizing photonic quantum computing: part 1: FDTD (quantum devices) by Muhammad Faris Zikri Bin Zainal

“…To advance photonic quantum computing, this report focuses on the usage of integrated photonic devices, namely beam splitters functioning as directional couplers. …”
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Empty-bucket techniques for spill-quality improvement at the CERN Super Proton Synchrotron by Arrutia Sota, PA, Fraser, MA, Hagmann, G, Kain, V, Papotti, G, Spierer, A, Velotti, FM, Burrows, PN, Piandani, R

“…Synchrotrons can provide long spills of particles by employing resonant extraction where the circulating beam is slowly ejected over thousands to millions of turns by exploiting the amplitude growth caused by a transverse resonance. …”

Multipass steering protocols at Jefferson lab by Bodenstein, RM, Tiefenback, MG

“…The CEBAF recirculating accelerator consists of two CW superconducting RF linacs, through which an electron beam is accelerated for up to 5 passes. Focusing and steering elements affect each pass differently, requiring a multipass steering protocol to correct the orbits. …”

Arbitrary and independent polarization control in situ via a single metasurface by Yan, Libin, Zhu, Weiming, Muhammad Faeyz Karim, Cai, Hong, Gu, Alex Yuandong, Shen, Zhongxiang, Chong, Peter Han Joo, Tsai, Din Ping, Kwong, Dim-Lee, Qiu, Cheng-Wei, Liu, Ai Qun

“…As a proof of concept, a tunable polarization beam splitter, a dynamic beam steering component, and a quarter waveplate are demonstrated using one single metasurface. …”
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Depth-of-focus extension in optical coherence tomography via multiple aperture synthesis by Ge, Xin, Wang, Xianghong, Bo, En, Luo, Yuemei, Chen, Si, Liu, Xinyu, Wang, Nanshuo, Chen, Shufen, Chen, Shi, Li, Jinhan, Liu, Linbo

“…Using confocal optics on a sample arm, we scanned the illumination beam across the under-filled objective lens pupil plane by steering the beam at the pinhole using a microcylindrical lens. …”
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Caustic object construction based on multiple caustic patterns by Tandianus, Budianto, Johan, Henry, Seah, Hock Soon

“…Working backward, from the computed refracted light beam paths we compute the geometry of the caustic object that can produce such light beam paths. …”
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Design of wideband low-loss reconfigurable reflectarray antenna by Zhang, Xiran

“…A systematic investigation of beam scanning antenna technology is conducted, analyzing the characteristics of different beam scanning antenna designs. …”
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Design and fabrication of micromachined RF switches and integrated switching circuits by Tang, Min

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Progressive collapse of reinforced concrete building structures by Dat, Pham Xuan

“…The loss of either a penultimate-internal (PI) or a penultimate-external (PE) column is the most critical scenario since it leaves the associated beam-slab floor structures with lack of external lateral support. …”
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Control system design for EPTB by Tan, Sing Guan

“…Previous research was mainly on the Indoor air quality (IAQ) and the negative ion air performance on passive thermosiphon beam (PTB). This is because thermal comfort is only one of the many factors that contribute to good IAQ. …”
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TORCH — an innovative high-precision time-of-flight PID detector for the LHCb upgrade by Föhl, K, Brook, N, García, LC, Cowie, EN, Cussans, D, Forty, R, Frei, C, Gao, R, Gys, T, Harnew, N, Piedigrossi, D, van Dijk, M

“…Preparations for the upcoming test beam are discussed. Optical design studies have been performed for using one of the available bar boxes of the BaBar DIRC detector containing assembled quartz radiator bars in a future test beam experiment.…”

Mathematical programming approach to elasto-plastic structural analysis by Li, Xuyang.

“…This research focuses on mathematical programming (MP) applications in elastoplastic structural analyses, mainly for structures of frames and submarine pipelines where beam element is used for discretizing the structure. …”
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