Results 241 to 250 of about 115,619 (374)

Coherent Terahertz Hyper‐Raman Spectroscopy

open access: yesJournal of Raman Spectroscopy, EarlyView.
In this paper, we review our recent discovery of a novel nonlinear effect in the terahertz frequency range, which we have termed terahertz hyper‐Raman (THYR) spectroscopy. This technique shares many characteristics with conventional hyper‐Raman spectroscopy but is applied within the THz spectrum.
Domenico Paparo   +2 more
wiley   +1 more source

Multi‐Octave All‐Dielectric Directional Coupler Using Integrated Half‐Mirror for Ultrawideband Terahertz Systems

open access: yesLaser &Photonics Reviews, EarlyView.
Fully exploiting the broad untapped terahertz spectrum necessitates extending the bandwidth of practical guided‐wave systems. This work introduces a substrateless quasi‐optical integration platform to meet this need. Classical optical principles going back to the time of Michelson are adapted to a planar, micro‐machined, monolithic‐silicon platform ...
Daniel Headland   +4 more
wiley   +1 more source

Cauchy problem for degenerate parabolic equations [PDF]

open access: yesProceedings of the Japan Academy, Series A, Mathematical Sciences, 1973
openaire   +2 more sources

Large Beam Size Grating Coupler in Silicon‐on‐Insulator Using Fully Etched Subwavelength Gratings

open access: yesLaser &Photonics Reviews, EarlyView.
A fully etched, double‐period subwavelength structure is used to design a silicon‐on‐insulator grating coupler for large, well‐collimated off‐chip beams. The work experimentally demonstrates the generation of a 350‐micron wide beam, with a 54% radiation efficiency, thereby enabling efficient interaction with targets centimeters away from the chip ...
Miguel Barona‐Ruiz   +7 more
wiley   +1 more source

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