Results 11 to 20 of about 167 (84)
Self-Induced Phase Locking of Terahertz Frequency Combs in a Phase-Sensitive Hyperspectral Near-Field Nanoscope. [PDF]
Adv Sci (Weinh), 2022 Hyperspectral terahertz near field optical microscope comprising a miniaturized quantum cascade laser frequency comb, acting simultaneously as a source and as a detector. Quantum nanomaterials and related collective mode excitations can be probed at the nanoscale.
Pistore V +6 more
europepmc +2 more sources
Natural Crystal Structure for Generating Raman-Like Orbital Angular Momentum States. [PDF]
Adv Sci (Weinh)This work proposes a strategy for symmetry breaking of the degenerate OAM states relying on the natural anisotropy of crystal gain, to select the handedness of the spatial spiral phase front and further tunable Raman‐like OAM states by thermal‐driven, which clarifies the contribution of intrinsic crystal property to the OAM states and opens a new route
Meng T, Zheng C, Zhao Y, Yu H, Zhang H.
europepmc +2 more sources
Advanced Photonics Research, Volume 4, Issue 9, September 2023., 2023 Noise‐like pulses (NLPs) are becoming increasingly attractive, whereas few studies have been reported in the mid‐infrared. By exploiting a polarization‐maintaining (PM) fluoride fiber to cause a polarization‐dependent delay between the orthogonal‐polarized components of intracavity circulating pulses, this work theoretically and experimentally ...
Linpeng Yu +12 more
wiley +1 more source
A Decade of Sub‐100‐fs Thin‐Disk Laser Oscillators
Laser &Photonics Reviews, Volume 17, Issue 8, August, 2023., 2023 A decade has passed since the first demonstration of a sub‐100‐fs thin‐disk laser oscillator. Ever since, the technology has strived to become a 100‐W‐class single‐stage laser system capable of delivering sub‐100‐fs pulses directly from the oscillator without the requirement for chirped pulse amplification or nonlinear postcompression.
Jakub Drs +6 more
wiley +1 more source
Mode Coupling in Electromechanical Systems: Recent Advances and Applications
Advanced Electronic Materials, Volume 9, Issue 7, July 2023., 2023 Coupled mechanical resonator systems have recently become the focus of intense research in the field of micro/nanoelectromechanical systems. Focusing especially on experimental developments and practical applications, the coupled mechanism is divided in three types: intermode, near‐neighbor, and long‐range coupling.
Meng‐Lin Guo +11 more
wiley +1 more source
Femtosecond Frequency Combs with Few‐kHz Passive Stability over an Ultrabroadband Spectral Range
Laser &Photonics Reviews, Volume 17, Issue 7, July 2023., 2023 The noise properties of fiber‐based frequency combs are studied in a wide parameter range. In specific regions, the free‐running linewidth of the carrier‐envelope offset frequency drops below 1 kHz. All relevant contributions to the phase noise and their interplay are identified.
Sarah R. Hutter +7 more
wiley +1 more source
Recent advanced applications of metasurfaces in multi‐dimensions
Nanophotonics, Volume 12, Issue 13, Page 2295-2315, June 2023., 2023 Abstract Unlike traditional optical components, which rely on the gradual accumulation of light along the optical path over a distance much larger than the wavelength to form a wavefront, metasurfaces manipulate light field properties on the wavelength thickness by specially arranging various meta‐atoms.
Quan Yuan +8 more
wiley +1 more source
Asynchronous Upconversion Sampling of Frequency Modulated Combs
Laser &Photonics Reviews, Volume 17, Issue 4, April 2023., 2023 An asynchronous optical sampling technique for the temporal characterization of frequency modulated optical frequency combs is introduced in this work. On the basis of a mid‐infrared quantum cascade laser, its instantaneous intensity and optical frequency is measured.
Philipp Täschler +5 more
wiley +1 more source
Advanced Optical Materials, Volume 10, Issue 22, November 18, 2022., 2022 A gate‐tunable single‐layer graphene embedded in a quarter‐wave cavity behaves as a terahertz (THz) compact amplitude modulator, saturable absorber, and frequency tuner. Electrolyte ionic liquid gating ensures 40% modulation depth and 60% reflectivity modulation with ≈4.5 W cm−2 saturation intensity. Fine‐tuning of the intermode beatnote frequency of a
Alessandra Di Gaspare +5 more
wiley +1 more source
Parametric Nonlinear Optics with Layered Materials and Related Heterostructures
Laser &Photonics Reviews, Volume 16, Issue 9, September 2022., 2022 Outstanding nonlinear optical properties of 2D materials make them an attractive platform for fundamental studies and prospective photonic and optoelectronic applications. In this review, scientific and technological opportunities opened with the recent advances in the field of parametric nonlinear optics of 2D materials, as well as current challenges ...
Oleg Dogadov +4 more
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