Results 141 to 150 of about 1,467 (256)

Stimulated Forward Brillouin Scattering in Subwavelength Grating Silicon Membranes

Laser &Photonics Reviews, EarlyView.
This work proposes a novel strategy to achieve large Brillouin scattering with independent control of the optical and mechanical modes using subwavelength silicon membranes. We experimentally demonstrate remarkably high Brillouin gain, resulting in an on/off Stokes gain of 3 dB and anti‐Stokes loss of 4 dB in a 6 mm‐long waveguide with 35 mW of on‐chip
Paula Nuño Ruano, Jianhao Zhang, David González‐Andrade, Daniele Melati, Eric Cassan, Pavel Cheben, Laurent Vivien, Norberto Daniel Lanzillotti‐Kimura, Carlos Alonso‐Ramos   +8 more
wiley   +1 more source

A bright future for topological acoustics. [PDF]

Nat Commun
Alù A, Daraio C, Deymier P, Ruzzene M.
europepmc   +1 more source

Diffraction‐Free Natural Optical Skyrmions and Their Subwavelength Confinement Around Vortices

Laser &Photonics Reviews, EarlyView.
ABSTRACT Diffraction causes waves to spread out as they propagate freely. The tighter the lateral confinement, the faster the spreading. Past research on how to suppress diffraction has been based on wave engineering and has led so far to idealized waves that, in real settings, eventually diffract.
Nilo Mata‐Cervera, Deepak K. Sharma, Ramon Paniagua‐Dominguez, Yijie Shen, Miguel A. Porras   +4 more
wiley   +1 more source

Temporal Anti-Parity-Time Symmetry: Extending Non-Hermitian Physics to Time-Domain Dynamics in Thermal Diffusion. [PDF]

Research (Wash D C)
Yan H, Li Y.
europepmc   +1 more source

Extreme Optical Field Confinement and Enhancement in a Plasmonic Picopatch Within a Nanoparticle‐on‐Mirror Resonator

Laser &Photonics Reviews, EarlyView.
A picopatch in a plasmonic nanocavity confines the electromagnetic energy to tiny effective volumes, close to 1nm3, leading to extreme electric field enhancements. Furthermore, a clear signature of strong coupling between the picopatch modes and other modes of the structure is obtained, which strongly modifies the far‐field response. ABSTRACT Plasmonic
Jinna He, Mario Zapata‐Herrera, Xabier Arrieta, Mingli Wan, Yuan Zhang, Javier Aizpurua, Ruben Esteban   +6 more
wiley   +1 more source

Piezoelectric-Metal Phononic Crystal Enabling GHz Tunable Ultrahigh Q Quasi-BIC Mode. [PDF]

Adv Sci (Weinh)
Xu X, Li J, Wang R, Xiong R, Wang Y, Shen X, Wu T.   +6 more
europepmc   +1 more source

3-rd Spring School on Acousto-Optics and Applications Gdańsk–Wieżyca, May 29-31, 1986 // Istituto di Acustica ,,O. M. Corbino’’, 50th anniversary celebration, Rome, Italy, 28-30 april 1987

Archives of Acoustics
The 3-rd School on Acousto-optics and Applications like the two previous ones (in 1980 – Arch. Acoust. 6 (1981) 85-86 and in 1983 – Arch. Acoust. 9 (1984) 382-382) took place at Wieżyca near Gdańsk in the recreation centre of the Gdynia Shipyard.
A. ŚLIWIŃSKI, P. E. GIUA
doaj  

Tunable, High Pulse Energy and Narrow Linewidth Gas‐Filled Fiber Laser Across Near‐ and Mid‐Infrared

Laser &Photonics Reviews, EarlyView.
A cascaded gas‐filled anti‐resonant hollow‐core fiber architecture enables broadly tunable infrared Raman lasers spanning ∼1.4–4.6 µm while maintaining microjoule‐level pulse energies and gigahertz‐level linewidths. The approach combines a wavelength‐tunable pump laser with optimized Raman frequency conversion, providing a compact route to high ...
Yazhou Wang, Marcello Meneghetti, Manoj K. Dasa, Timothy Bate, J. E. Antonio‐Lopez, Ian A. Davidson, Qiang Fu, Jaroslaw Rzegocki, Gregory T. Jasion, Francesco Poletti, Rodrigo Amezcua‐Correa, Christos Markos   +11 more
wiley   +1 more source

Koopman-von Neumann and Weyl-Wigner Phase-Space Formulation of Inviscid Euler Flows. [PDF]

Entropy (Basel)
Molnar SM, Godfrey JR.
europepmc   +1 more source

Comparison of Calorimetry and NMR Relaxometry Measurements of Epoxy Cure Kinetics

Journal of Polymer Science, EarlyView.
Single‐sided NMR monitors epoxy cure in three DGEBA/diamine systems, alongside benchmark DSC measurements. Fitting both datasets to a Kamal‐Malkin kinetic model shows NMR‐derived rate constants typically exceed DSC values, revealing an offset between gelation and chemical conversion.
Olivia Cassara, Kayla Copeman, Sydney Joyce Tate, Jack Ballenger, Tyler Meldrum   +4 more
wiley   +1 more source