Results 181 to 190 of about 54,360 (285)

Reconfigurable Circularly Polarized Terahertz Emission from vdW Ferroelectric NbOI2

Laser &Photonics Reviews, EarlyView.
A controllable chiral terahertz pulse can be generated using a simple dual‐flake vdW ferroelectric NbOI2 emitter in which the polar axes of the two NbOI2 flakes are orthogonal. Both the chirality and the ellipticity can be manipulated by varying the separation distance and the orientations of their polar axes.
Baolong Zhang, Ruihuan Duan, Zheng Liu, Ranjan Singh   +3 more
wiley   +1 more source

Detection and imaging of chemicals and hidden explosives using terahertz time-domain spectroscopy and deep learning. [PDF]

Light Sci Appl
Jiang X, Li Y, Li Y, Shen CY, Ozcan A, Jarrahi M.   +5 more
europepmc   +1 more source

Non‐Uniform Programmable Photonic Waveguide Meshes

Laser &Photonics Reviews, EarlyView.
Integrating defect cells into uniform hexagonal waveguide meshes overcomes the fundamental spectral and temporal limitations of programmable photonics. By leveraging the Vernier effect through non‐uniform coupled cavities, this architecture achieves a tenfold increase in free spectral range and ultra‐fast sampling times, paving the way for next ...
Cristina Catalá‐Lahoz, José Capmany
wiley   +1 more source

Longwave-transparent low-emissivity material. [PDF]

Sci Adv
Zhang Y, Li L, Dai J, Zhang X, Zhou Q, Yi N, Jiang R, Zhu F, Li X, Sun M, Wu J, Li X, Kong X, Liu Z, Zhang Q, Li Y, Cheng Q, Zhu Y, Xu W, Cui TJ, Li W.   +20 more
europepmc   +1 more source

NIR/VIS Dual‐Comb Spectroscopy Comparing High and Low Repetition Rate Regimes

Laser &Photonics Reviews, EarlyView.
This work compares dual‐comb spectroscopy at lower and higher repetition rates, emphasizing the inherent trade‐off between spectral and temporal resolution. The 80 MHz system provides high‐resolution spectra suitable for analyzing complex molecular structures, whereas the free‐running 1 GHz platform enables fast measurements for real‐time trace gas ...
Alexander Eber, Mithun Pal, Lukas Fürst, Emily Hruska, Christoph Gruber, Marcus Ossiander, Birgitta Bernhardt   +6 more
wiley   +1 more source

Tunable multi-band terahertz sensor based on graphene plasmonic metasurfaces. [PDF]

Sci Rep
Khafagy M, Ghanim AM, Swillam MA.
europepmc   +1 more source

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, EarlyView.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

Modulation of confined water dynamics in ion channels by terahertz electric fields. [PDF]

Nanoscale Adv
Zhao X, Ding W, Wang H, Li Y, Liu C.
europepmc   +1 more source

Topological Photonic Devices and Circuits at Terahertz Frequencies

Laser &Photonics Reviews, EarlyView.
This review examines how 3D topological insulators and emerging topological photonic phases enable robust, low‐loss and defect‐immune terahertz devices. Fundamental properties, device implementations and topological transport mechanisms are surveyed, revealing new opportunities for reconfigurable, high‐performance THz components and scalable ...
Samane Kalhor, Srabani Kar, Ranjan Singh, Kaveh Delfanazari   +3 more
wiley   +1 more source

The Effects of K-BNNS Nanoparticles on PD Characteristics of Composite Aramid Paper. [PDF]

Nanomaterials (Basel)
Chen YH, Li XN, Zhang WX, Qin T, Cheng QK, Wu B.   +5 more
europepmc   +1 more source