Презентация Optical identification using imperfections in 2D materials онлайн
На нашем сайте вы можете скачать и просмотреть онлайн доклад-презентацию на тему Optical identification using imperfections in 2D materials абсолютно бесплатно. Урок-презентация на эту тему содержит всего 13 слайдов. Все материалы созданы в программе PowerPoint и имеют формат ppt или же pptx. Материалы и темы для презентаций взяты из открытых источников и загружены их авторами, за качество и достоверность информации в них администрация сайта не отвечает, все права принадлежат их создателям. Если вы нашли то, что искали, отблагодарите авторов - поделитесь ссылкой в социальных сетях, а наш сайт добавьте в закладки.
Оцените презентацию от 1 до 5 баллов!
- Тип файла:ppt / pptx (powerpoint)
- Всего слайдов:13 слайдов
- Для класса:1,2,3,4,5,6,7,8,9,10,11
- Размер файла:2.89 MB
- Просмотров:58
- Скачиваний:0
- Автор:неизвестен
Слайды и текст к этой презентации:
№1 слайд
Содержание слайда: Optical identification using imperfections in 2D materials
№2 слайд
Содержание слайда: Introduction
The ability to uniquely identify an object or device is important for authentication. Imperfections, locked into structures during fabrication, can be used to provide a fingerprint that is challenging to reproduce.
№3 слайд
Содержание слайда:
№4 слайд
Содержание слайда: Objective
To analise a proposed simple optical technique to read unique information from nanometer-scale defects in 2D materials.
№5 слайд
Содержание слайда: Tasks
Method
Results for WS2 from mechanically exfoliation
Results for WS2 from chemical vapor deposition
Conclusion
№6 слайд
Содержание слайда: Method
Measurement apparatus, in which the photoluminescence from a monolayer TMD is collected by an objective lens (OL), selectively transmitted through a rotatable optical bandpass filter (BPF), finally imaged on a CCD sensor.
№7 слайд
Содержание слайда: Angular orientations of the BPF determines the center-wavelength of its pass band, which varies with incidence angle
Angular orientations of the BPF determines the center-wavelength of its pass band, which varies with incidence angle
№8 слайд
Содержание слайда: Concept of the angular selective transmission
Changing the BPF angle lights up a random subset of pixels on the CCD; red, green and blue conceptually correspond to positions on the monolayer TMD that emits in differing energy ranges. When no filter is present, all energies are picked up.
№9 слайд
Содержание слайда: Makeup of PUF
The BPF angular orientation θ, the corresponding BPF bandwidth, and the spatially varying photoluminescence of the monolayer TMD PL makes up the physical unclonable function.
№10 слайд
Содержание слайда: Results for WS2 from mechanically exfoliation
50× Optical image of the exfoliated flake on PDMS. μ-PL map of this flake was recorded with 532 nm excitation and 100 μW excitation power at 300 K. The integration time for each pixel is 0.5 s.
№11 слайд
Содержание слайда: Results for WS2 from chemical vapor deposition
Angular-dependent PL images of monolayer flake, excited by 450 nm laser, collected using 50× (a)–(c) and 10× (d)–(f) respectively.
№12 слайд
Содержание слайда: Angular dependent PL images of WS2 monolayer flake, excited by 450 nm laser, imaged by a 10× objective lens
Angular dependent PL images of WS2 monolayer flake, excited by 450 nm laser, imaged by a 10× objective lens
№13 слайд
Содержание слайда: Conclusion
Spatial non-uniform photoluminescence is more pronounced for chemical vapor grown flakes than those created using mechanical exfoliation.
The key to implementing a real authentication or identification system based on an optical PUF, such as the one we described, is to capture the random response or physical characteristics and generate unique fingerprints. So far we have discussed a method to capture the response from 2D materials, based on imaging the fluorescence from structural defects with a bandpass filter at different detection angles.
Скачать все slide презентации Optical identification using imperfections in 2D materials одним архивом:
