FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3204088244> ?p ?o ?g. }

• W3204088244 abstract "In photonics, the study of wave propagation in scattering media is limited by the inherent challenges in detecting the time-varying electric field oscillations, as detectors and cameras are only sensitive to the optical intensity. In the Terahertz (THz) domain, however, Time-Domain Spectroscopy (TDS) is an established technique capable of directly measuring the electric field and provide full-wave characterisation (amplitude and optical delay) in time. The combination of THz time-resolved measurements with the theory of wave propagation in scattering media is a rapidly emerging subject. It opens a promising route to gain coherent control over multiple-scattering phenomena in ways not previously accessible in optics [1] . Besides, the combination of broadband excitation and coherent, field-sensitive detection could allow investigating the transmission properties of a scattering medium in unprecedented detail and retrieve its coherent transfer-matrix representation, a task out-of-reach at optical frequencies. In this work, we theoretically demonstrate spatiotemporal refocusing of THz waves following a direct measurement of the transfer matrix of the scattering medium. Our approach combines the advantages offered by field-sensitive detection with the nonlinear wavefront shaping of THz waves. Wavefront shaping represents the state-of-the-art in the control of complex wave propagation at optical frequencies, as it allows to sequentially retrieve the transfer matrix elements of the scatterer [2] . To overcome the limited availability of THz Spatial Light Modulator (SLM) devices, we employ a recently proposed technique based on the nonlinear conversion of structured optical beams to THz patterns [3] . Specifically, we take inspiration from nonlinear Ghost-Imaging techniques and project a complete set of orthogonal Hadamard patterns on the scatterer [4] . This technique allows us to retrieve the complex-valued elements of the transfer matrix by numerical inversion ( Fig. 1a,b ). We apply the direct knowledge of the transfer matrix elements to identify the optimal focusing pattern in a deterministic fashion ( Fig. 1c,d ). Unlike iterative optimisation techniques [2] , our deterministic approach takes advantage of the full amount of spatiotemporal information encoded in the transfer matrix elements. Under this view, the task of identifying the optimal input wavefront is rewritten into an inverse problem that can be solved via constraint least-square optimisation methods. An exemplary result is shown in Fig. 1c,d , where our technique is employed to achieve spatiotemporal refocusing (i.e., focusing in space and compression in time) of a single cycle THz pulse." @default.
• W3204088244 created "2021-10-11" @default.
• W3204088244 creator A5009176490 @default.
• W3204088244 creator A5025008007 @default.
• W3204088244 creator A5046005653 @default.
• W3204088244 creator A5071762248 @default.
• W3204088244 creator A5079302451 @default.
• W3204088244 date "2021-06-21" @default.
• W3204088244 modified "2023-09-26" @default.
• W3204088244 title "Deterministic spatiotemporal focusing of terahertz waves through scattering media" @default.
• W3204088244 cites W3027290730 @default.
• W3204088244 doi "https://doi.org/10.1109/cleo/europe-eqec52157.2021.9541629" @default.
• W3204088244 hasPublicationYear "2021" @default.
• W3204088244 type Work @default.
• W3204088244 sameAs 3204088244 @default.
• W3204088244 citedByCount "0" @default.
• W3204088244 crossrefType "proceedings-article" @default.
• W3204088244 hasAuthorship W3204088244A5009176490 @default.
• W3204088244 hasAuthorship W3204088244A5025008007 @default.
• W3204088244 hasAuthorship W3204088244A5046005653 @default.
• W3204088244 hasAuthorship W3204088244A5071762248 @default.
• W3204088244 hasAuthorship W3204088244A5079302451 @default.
• W3204088244 hasConcept C107816215 @default.
• W3204088244 hasConcept C120665830 @default.
• W3204088244 hasConcept C121332964 @default.
• W3204088244 hasConcept C165699331 @default.
• W3204088244 hasConcept C191486275 @default.
• W3204088244 hasConcept C20788544 @default.
• W3204088244 hasConcept C77887725 @default.
• W3204088244 hasConceptScore W3204088244C107816215 @default.
• W3204088244 hasConceptScore W3204088244C120665830 @default.
• W3204088244 hasConceptScore W3204088244C121332964 @default.
• W3204088244 hasConceptScore W3204088244C165699331 @default.
• W3204088244 hasConceptScore W3204088244C191486275 @default.
• W3204088244 hasConceptScore W3204088244C20788544 @default.
• W3204088244 hasConceptScore W3204088244C77887725 @default.
• W3204088244 hasLocation W32040882441 @default.
• W3204088244 hasOpenAccess W3204088244 @default.
• W3204088244 hasPrimaryLocation W32040882441 @default.
• W3204088244 hasRelatedWork W1994677617 @default.
• W3204088244 hasRelatedWork W2027497269 @default.
• W3204088244 hasRelatedWork W2031954464 @default.
• W3204088244 hasRelatedWork W2091719164 @default.
• W3204088244 hasRelatedWork W2161084728 @default.
• W3204088244 hasRelatedWork W2288575225 @default.
• W3204088244 hasRelatedWork W2562807429 @default.
• W3204088244 hasRelatedWork W2760986035 @default.
• W3204088244 hasRelatedWork W2801377676 @default.
• W3204088244 hasRelatedWork W3160791076 @default.
• W3204088244 isParatext "false" @default.
• W3204088244 isRetracted "false" @default.
• W3204088244 magId "3204088244" @default.
• W3204088244 workType "article" @default.