Results 161 to 170 of about 40,370 (319)

Spontaneous Parametric Down‐Conversion in 4H‐SiC Integrated Platform

open access: yesLaser &Photonics Reviews, EarlyView.
Photon‐pair generation in 4H‐SiC‐on‐insulator integrated platform is demonstrated through spontaneous parametric down conversion. Different second‐order nonlinear interactions are also shown in 4H‐SiC waveguides, highlighting the potential to exploit diverse phase‐matching mechanisms on this platform.
Xiaodong Shi   +12 more
wiley   +1 more source

1 PHz of Coherent Bandwidth from a Compact Fiber Device

open access: yesLaser &Photonics Reviews, EarlyView.
A coherent comb spectrum with an unprecedented bandwidth of 1 PHz, spanning from the deep ultraviolet (280 nm) to the mid‐infrared (2700 nm), is generated by a compact fiber device. The integrated, novel pulse purification technology enables broadband dispersion control and the synthesis of low‐noise, single‐cycle near‐infrared pulses with a clean ...
Sarah R. Hutter   +4 more
wiley   +1 more source

THz Generation by Two-Color Plasma: Time Shaping and Ultra-Broadband Polarimetry

open access: yesSensors
The generation of terahertz radiation via laser-induced plasma from two-color femtosecond pulses in air has been extensively studied due to its broad emission spectrum and significant pulse energy. However, precise control over the temporal properties of
Domenico Paparo   +5 more
doaj   +1 more source

Space‐Time‐Modulated Metasurface Enabled High‐Performance Near‐Field Focusing with Enhanced Phase Modulation

open access: yesLaser &Photonics Reviews, EarlyView.
This study leverages STM technology to enhance NFF performance by enabling continuous phase control at the +1st harmonic without increasing hardware complexity. It overcomes the limitations of conventional 1‐bit TMs caused by phase quantization errors and demonstrates that even compact arrays can achieve effective focusing, highlighting the strong ...
Manting Wang   +7 more
wiley   +1 more source

Speckle patterns formed by broadband terahertz radiation and their applications for ghost imaging. [PDF]

open access: yesSci Rep, 2021
Leibov L   +6 more
europepmc   +1 more source

A Dual‐Programmable Metasurface with Duplex Beam Steering for Full‐Space Terahertz Communications

open access: yesLaser &Photonics Reviews, EarlyView.
A dual‐programmable terahertz metasurface enables independent control of transmission and reflection beam steering. It breaks through the limitations in resonant tunability by polarization allocation with 2D‐electron‐gas tuning, enabling a single resonator to incorporate bidirectional operating modes.
Luyang Wang   +15 more
wiley   +1 more source

Room‐Temperature Mid‐Infrared Detection Using Metasurface‐Absorber‐Integrated Phononic Crystal Oscillator

open access: yesLaser &Photonics Reviews, EarlyView.
Room‐temperature mid‐infrared (MIR) detectors are demonstrated using lithium niobate surface acoustic wave phononic crystal oscillators integrated with metasurface absorbers. The devices exhibit rapid thermal response and simplified fabrication compared to suspended resonators.
Zichen Xi   +11 more
wiley   +1 more source

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