Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Trichopoulos, G.C. Sertel, K. |
| Copyright Year | 2014 |
| Description | Author affiliation: ElectroScience Lab., Ohio State Univ., Columbus, OH, USA (Trichopoulos, G.C.; Sertel, K.) |
| Abstract | Summary form only given. We develop a new terahertz (THz) imaging approach with 90 μm image resolution at 750 GHz using an inverse-microscope quasi-optical setup with an extended hemispherical high-resistivity silicon lens and a vector network analyzer frequency extender with horn-antenna output port. Owing to the large refractive index of silicon lens (n~3.5), the achieved resolution is less than $λ_{0}/3,$ where $λ_{0}$ is the free-space wavelength. The test sample is placed on the focal plane of the silicon lens, making direct contact with the flat focal surface of the back side of the extended hemispherical lens and a raster-scan image is obtained using computer-controlled x-y translation stages. Reflected THz signal is digitized and recorded on a vector network analyzer, providing wideband reflection spectra of the sample as a function of position. Using the proposed imaging system, 2-dimensional THz images of planarized samples, including integrated circuits, chemical substances and biological tissue samples can be readily collected. This cost-effective quasi-optical approach can also easily be adapted to other signal acquisition systems, such as THz time-domain spectroscopy (THz-TDS) and/or continuous wave (THz-CW) systems to improve image resolution and expand their imaging capabilities. However, unlike existing THz-TDS and THz-CW systems where the source and receiver ports are disparate, the proposed VNA-based system uses the same port for the reflection $(S_{11})$ measurements. As such, it allows a direct measurement of normal reflection from the sample, resulting in more straightforward analysis of the sample properties. We will present the details of the setup and its performance using several samples that exhibit distinct morphological and spectroscopic behavior in the THz band. |
| Starting Page | 315 |
| Ending Page | 315 |
| File Size | 86103 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781479937462 |
| DOI | 10.1109/USNC-URSI.2014.6955698 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-07-06 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Image resolution Imaging Ports (Computers) Vectors Silicon Reflection Lenses |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|