Browsing by Author "Yang, Qing"

Now showing 1 - 4 of 4

Dichromatic Soliton-Molecule Compounds in Mode-Locked Fiber Lasers
(2024-06) Cui, Yudong; Yao, Xiankun; Hao, Xiang; Yang, Qing; Chen, Daru; Zhang, Yusheng; Liu, Xu; Sun, Zhipei; Malomed, Boris A.
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Soliton “molecules”, i.e., bound states of two or several solitons, represent a fundamental concept, which manifests itself in various nonlinear systems. They are dynamically similar to chemical molecules, attracting great interest to fundamental studies and offering potential applications (such as multilevel encoding of optical data). Here, the study demonstrates a novel dichromatic soliton-molecule compounds (DSMC) built as a hybrid bound state of multiple bound soliton pulses carried by two wavelengths in a fiber laser. The DSMCs are maintained by two different binding mechanisms, viz., the self-phase modulation (SPM) interaction between temporal solitons at the same wavelength, mediated by their tails, and the cross-phase modulation (XPM) interaction between solitons at different wavelengths. They also exhibit unique temporal and spectral vibration profiles. Both static DSMCs and ones with robust internal vibrations are generated experimentally in the fiber laser, and numerically as solutions of the corresponding dissipative nonlinear model. The findings reported here expand the concept of soliton molecules and further promote their similarity to chemical molecules.
A general ink formulation of 2D crystals for wafer-scale inkjet printing
(2020-08-01) Hu, Guohua; Yang, Lisong; Yang, Zongyin; Wang, Yubo; Jin, Xinxin; Dai, Jie; Wu, Qing; Liu, Shouhu; Zhu, Xiaoxi; Wang, Xiaoshan; Wu, Tien Chun; Howe, Richard C.T.; Albrow-Owen, Tom; Ng, Leonard W.T.; Yang, Qing; Occhipinti, Luigi G.; Woodward, Robert I.; Kelleher, Edmund J.R.; Sun, Zhipei; Huang, Xiao; Zhang, Meng; Bain, Colin D.; Hasan, Tawfique
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Recent advances in inkjet printing of two-dimensional (2D) crystals show great promise for next-generation printed electronics development. Printing nonuniformity, however, results in poor reproducibility in device performance and remains a major impediment to their large-scale manufacturing. At the heart of this challenge lies the coffee-ring effect (CRE), ring-shaped nonuniform deposits formed during postdeposition drying. We present an experimental study of the drying mechanism of a binary solvent ink formulation. We show that Marangoni-enhanced spreading in this formulation inhibits contact line pinning and deforms the droplet shape to naturally suppress the capillary flows that give rise to the CRE. This general formulation supports uniform deposition of 2D crystals and their derivatives, enabling scalable and even wafer-scale device fabrication, moving them closer to industrial-level additive manufacturing.
Quantum contextuality in Shor's algorithm
(2021-12-17) Yang, Qing
Perustieteiden korkeakoulu | Bachelor's thesis
Single-nanowire spectrometers
(2019-09-06) Yang, Zongyin; Albrow-Owen, Tom; Cui, Hanxiao; Alexander-Webber, Jack; Gu, Fuxing; Wang, Xiaomu; Wu, Tien Chun; Zhuge, Minghua; Williams, Calum; Wang, Pan; Zayats, Anatoly V.; Cai, Weiwei; Dai, Lun; Hofmann, Stephan; Overend, Mauro; Tong, Limin; Yang, Qing; Sun, Zhipei; Hasan, Tawfique
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Spectrometers with ever-smaller footprints are sought after for a wide range of applications in which minimized size and weight are paramount, including emerging in situ characterization techniques. We report on an ultracompact microspectrometer design based on a single compositionally engineered nanowire. This platform is independent of the complex optical components or cavities that tend to constrain further miniaturization of current systems. We show that incident spectra can be computationally reconstructed from the different spectral response functions and measured photocurrents along the length of the nanowire. Our devices are capable of accurate, visible-range monochromatic and broadband light reconstruction, as well as spectral imaging from centimeter-scale focal planes down to lensless, single-cell-scale in situ mapping.