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  1. No Access

    Article

    Genuine Multipartite Quantum Steering can be Generated by Enhanced Raman Scattering without Optical Cavity

    Multipartite quantum steering correlation among Raman scattering beams generated by the enhanced Raman scattering process is investigated. In this single-pass nonlinear process, without an optical resonant cav...

    J. W. Lv, X. Y. Cheng, Y. R. Shen… in International Journal of Theoretical Physi… (2024)

  2. Article

    Open Access

    The generation of genuine quadripartite Einstein–Podolsky–Rosen steering in an optical superlattice

    Einstein–Podolsky–Rosen (EPR) steering is a quantum effect based on quantum entanglement and it is the key resource for building quantum networks because of its useful properties. Based on the criterion for ge...

    Y. R. Shen, T. H. Chen, S. L. Liang, X. Y. Cheng, J. W. Lv… in Scientific Reports (2023)

    Download PDF (1426 KB) View Article

  3. No Access

    Chapter

    Theory of Self-Phase Modulation and Spectral Broadening

    The chapter focuses on self-phase modulation (SPM) arising from Kerr nonlinear index n2 which leads to spectral broadening from various physical mechanisms depending on temporal responses: ultrafast(electronic...

    Y. R. Shen, Guo-Zhen Yang in The Supercontinuum Laser Source (2022)

  4. No Access

    Chapter

    Theory of Self-Phase Modulation and Spectral Broadening

    Self-phase modulation refers to the phenomenon in which a laser beam propagating in a medium interacts with the medium and imposes a phase modulation on itself. It is one of those very fascinating effects disc...

    Y. R. Shen, Guo-Zhen Yang in The Supercontinuum Laser Source (2016)

  5. No Access

    Book

    Self-focusing: Past and Present

    Fundamentals and Prospects

    Robert W. Boyd, Svetlana G. Lukishova… in Topics in Applied Physics (2009)

  6. No Access

    Article

    Optical metamaterials at near and mid-IR range fabricated by nanoimprint lithography

    Two types of optical metamaterials operating at near-IR and mid-IR frequencies, respectively, have been designed, fabricated by nanoimprint lithography (NIL), and characterized by laser spectroscopic ellipsome...

    W. Wu, E. Kim, E. Ponizovskaya, Y. Liu, Z. Yu, N. Fang, Y.R. Shen… in Applied Physics A (2007)

  7. No Access

    Chapter and Conference Paper

    Stimulated Terahertz Emission from Excitons in Cu2O

    Using ultrashort terahertz (THz) pulses we observe stimulated emission between internal energy levels of excitons. Emission occurs in Cu2O due to the 3p to 2s transition at 6.6 meV, with a cross section of 10−14 ...

    R. A. Kaindl, R. Huber, B. A. Schmid, Y. R. Shen, D. S. Chemla in Ultrafast Phenomena XV (2007)

  8. No Access

    Chapter and Conference Paper

    Optically Active Sum Frequency Generation Microscopy for Cellular Imaging

    Optically active sum-frequency generation microscopy was applied to imaging cells, utilizing the intrinsic chirality of biological macromolecules as the contrast mechanism.

    K. Zhang, N. Ji, Y. R. Shen, H. Yang in Ultrafast Phenomena XV (2007)

  9. No Access

    Chapter

    Theory of Self-Phase Modulation and Spectral Broadening

    Y.R. Shen, Guo-Zhen Yang in The Supercontinuum Laser Source (2006)

  10. No Access

    Article

    Vibrational spectroscopy of ice interfaces

    Vibrational spectroscopy via infrared-visible sum-frequency generation was used to probe interfaces of hexagonal ice(0001) with vapor, a hydrophobic solid, and a hydrophilic solid. The OH stretch vibrational m...

    X. Wei, Y.R. Shen in Applied Physics B (2002)

  11. No Access

    Article

    Surface contribution versus bulk contribution in surface nonlinear optical spectroscopy

    Y.R. Shen in Applied Physics B (1999)

  12. No Access

    Article

    Correlation of Structure and Mechanical Properties of Polyolefin Surfaces by Ir + Visible Sum Frequency Generation Vibrational Spectroscopy and Atomic Force Microscopy

    The surface vibrational spectrum of atactic polypropylene was measured using IR+Visible Sum Frequency Generation (SFG) vibrational spectroscopy, in the temperature range 23 to -50 °C. A sharp rise in the inten...

    D. H. Gracias, D. Zhang, Y. R. Shen, G. A. Somorjai in MRS Online Proceedings Library (1998)

  13. No Access

    Article

    Surface chemistry-mechanical property relationship of low density polyethylene: an IR+visible sum frequency generation spectroscopy and atomic force microscopy study

    Surface-specific IR+visible sum frequency generation (SFG) spectroscopy was used to obtain chemical composition of two polymer surfaces. The SFG surface vibrational spectrum of pure low density polyethylene an...

    D.H. Gracias, D. Zhang, Y.R. Shen, G.A. Somorjai in Tribology Letters (1998)

  14. No Access

    Article

    Multiphoton Excitation Studies on GaN with PS Pulses

    We report the observation of UV photoluminescence (PL) from wurtzite GaN by multiphoton excitation. The dependence of the PL intensity on excitation intensity as well as PL excitation measurements with sub-ban...

    I. H. Libon, C. Voelkmann, D. Kim, V. Petrova-Koch… in MRS Online Proceedings Library (1996)

  15. No Access

    Chapter and Conference Paper

    Femtosecond Analysis of the Spinning Motion of Liquid Crystal Molecules in Smectic A Phases

    Analysis of the spinning motion of liquid crystal molecules is reported for the first time. A femtosecond pump probe Kerr effect experiment allowed us to evidence both individual and collective contributions t...

    A. Le Calvez, S. Montant, E. Freysz, R. M. Rassoul, A. Ducasse… in Ultrafast Phenomena X (1996)

  16. No Access

    Article

    Monitoring surfaces on the molecular level during catalytic reactions at high pressure by sum frequency generation vibrational spectroscopy and scanning tunneling microscopy

    Sum frequency generation (SFG), using non-linear laser optics, detects vibrational spectra of submonolayer amounts of adsorbates with excellent energy and time resolution. Scanning tunneling spectroscopy (STM)...

    P. S. Cremer, B. J. McIntyre, M. Salmeron, Y. -R. Shen, G. A. Somorjai in Catalysis Letters (1995)

  17. No Access

    Article

    Nonlinear optical studies of surfaces

    A brief overview on second-harmonic generation and sum-frequency generation as surface analytical tools is given with a discussion on the intrinsic limitations of the techniques often encountered in the applic...

    Y. R. Shen in Applied Physics A Solids and Surfaces (1994)

  18. No Access

    Chapter

    Optical-Field-Induced Birefringence and Freedericksz Transition in a Nematic Liquid Crystal

    Optical-field-induced birefringence in nematic 4-cyano-4′-pentylbiphenyl was measured with cw pump and probe beams, and the optical-field-induced Freedericksz transition was observed for the first time. The re...

    S. D. Durbin, S. M. Arakelian, Y. R. Shen in Opticals Effects in Liquid Crystals (1991)

  19. No Access

    Chapter

    Collective Rotation of Molecules Driven by the Angular Momentum of Light in a Nematic Film

    It is experimentally demonstrated that a circularly polarized laser beam normally incident on a homeotropically aligned nematic film can induce a collective precession of the molecules in the film if the laser...

    E. Santamato, B. Daino, M. Romagnoli, M. Settembre… in Opticals Effects in Liquid Crystals (1991)

  20. No Access

    Chapter

    Optically induced twist Fréedericksz transitions in planar-aligned nematic liquid crystals

    The optical-field-induced Fréedericksz transition for a twist deformation by a normally incident laser beam in a planar-aligned nematic liquid crystal is studied. The Euler equation for the molecular director ...

    E. Santamato, G. Abbate, P. Maddalena, Y. R. Shen in Opticals Effects in Liquid Crystals (1991)

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