H2020Индивидуална стипендия2020–2022

BB-SLM · Polychromatic digital optics for structured light

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2020-03-01 → 2022-02-28
Финансиране от ЕС: 196 708 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Течнокристални устройства се разработват за управление на многоцветна светлина чрез цифрови сигнали. Това би помогнало за по-бързото предаване на данни в телекомуникациите чрез едновременно контролиране на цвета, поляризацията и интензитета на светлинния лъч.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Polychromatic digital optics for structured light

The scientific objective of this project is to develop a portable, efficient liquid crystal-based optical device to control the flow of polychromatic light using external electric and optical fields. The liquid crystal-based optical devices are well known and widely used in display technologies. We focus on cholesterics liquid crystals to efficiently control the spatial distribution of polychromatic light using computer-generated digital signals, and hence easily integrated into the existing optical technologies. It is worth noting that the current SLM technologies are designed to be monochromatic for maximum efficiency, so application is limited to a single wavelength of light. This two-year project is designed to develop a cutting-edge, digitally controlled spatial light modulator with maximum efficiency for a range of wavelengths. Such a device is anticipated by incorporating the achromatic nature of geometric phases with spin-dependent broadband circular Bragg-reflection from an electrically controlled cholesteric liquid crystal (ChLCs). ChLCs are chiral nematic liquid crystals. During this project, we aimed to find and demonstrate innovative solutions to fully control the spatial properties of ChLCs patterning towards the development of novel devices enabling efficient and polychromatic beam shaping. Subsequently, one can efficiently encode and decode light's all degrees of freedom; colour, polarisation and intensity in a telecommunication channel, pushing further the existing technological limitations for high-speed data manipulation and transfer and other photonic technology. Conclusions of the action: - Conventional ChLC and the cells are not suitable for the physical effects we were looking for, to realise the SLM proposed for the project. One should develop a new synthesising protocol to realise a new phase of ChLC whose supra-molecular structure alters axially at the boundary in response to the external electric field. Hence, we invited a research group from the USA who has strong expertise in synthesising unique kinds of LCs. They have developed and optimised a protocol to realise a unique ChLC cell with good homogeneity and sent us for the study. We have tested the samples and studied the phase modulation of the Bragg-reflected beam as a function of an external electric field. The preliminary studies have been completed and the results are promising for realising the anticipated device. Hence the host institutes will carry out the research and development activities, and the project will be completed in another year. Website details: No specific website has been developed for the project. The researcher's website projects page link is given for the question <Address (URL) of the project's public website>

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The development of photonics technologies implies ever-increasing agile optical components operating enabling the manipulation of the spatial degrees of freedom of light over broad spectral ranges. To date, spatial light modulators is a class of digital optical devices offering versatile management of light, however, state-of-the-art devices are operating efficiently only at a given wavelength. Here we propose to develop a digitally controlled spatial light modulator combining efficiency with intrinsically broadband behavior spanning the whole visible spectrum. This will be accomplished by integrating the advantage of spin controlled achromatic geometric Berry phase with broadband polarization-dependent circular Bragg reflection from spatially modulated chiral liquid crystals. Despite more than a century-long history of liquid crystals, the first report on the accumulation of Berry phase due to Bragg reflection came only very recently from the research group lead by the host scientist. The proposed two-year project to develop spatial light-modulators based on this basic physical principle. By doing so, we aim at controlling the interaction between the polarization state of light with its spatial degrees of freedoms (i.e., the spin-orbit interaction of light) by exploiting the inherently robust and diverse topological structures that spontaneously appear in anisotropic soft condensed matter systems such as liquid crystals. In particular, we will take advantage of both the self-organization orientational processes occurring in liquid crystals and their extreme sensitivity to external fields. By implementing a recently demonstrated physical concepts into a novel generation of spin-orbit optical devices enabling spatial control of the optical phase over a broad spectral range, this project will offer further possible applications for advanced photonic technologies, for instance in optical data processing, optical imaging and optical manipulation.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITE DE BORDEAUX · BordeauxКоординаторФранция