Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Low-cost bandpass filter for terahertz applications
Date
2015-04-01
Author
Takan, Taylan
Keskin, Hakan
Altan, Hakan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
136
views
0
downloads
Cite This
Compared to the visible and infrared regions of the electromagnetic spectrum, development of optical components in the terahertz region has progressed slowly even though the feature size of structures makes many of them easily attainable by many conventional manufacturing techniques. Of these, the performance of components with machined metal surfaces, such as filters, typically has suffered from the errors and inconsistencies in the manufacturing which has led many to manufacture these using more expensive deposition and processing tools. Here we show that by using a novel, high power Yb:doped pulsed nanosecond fiber laser system with exceptional beam quality, aluminum metal surfaces can be machined with high precision leading to a high quality band pass filter working in the terahertz frequency range. The filter was laser machined on a 0.05 mm thick aluminum substrate over a 1 cm area where the unit cell in the pattern had an equilateral triangular geometry in which the base length between the holes and the diameters were machined with better than 4 % accuracy. The produced structures are modeled by utilizing the obtained structural parameters in a waveguide configuration and then characterized by the existing home-built time-domain terahertz spectrometers in our laboratories. The results show a near 100 % power transmission at the desired terahertz frequency range which suggests that these manufacturing techniques can be used to produce low-cost THz filters.
Subject Keywords
THz
,
Filter
,
Fiber laser
,
Terahertz
,
TDS
URI
https://hdl.handle.net/11511/37699
Journal
OPTICAL AND QUANTUM ELECTRONICS
DOI
https://doi.org/10.1007/s11082-014-9996-x
Collections
Department of Physics, Article
Suggestions
OpenMETU
Core
Low frequency magnetic resonance conductivity imaging by means of oscillating gradient fields
Eroğlu, Hasan Hüseyin; Sadighi, Mehdi; Eyüboğlu, Behçet Murat (null; 2018-06-16)
Recently, low frequency (LF) magnetic resonance electrical conductivity imaging by means of oscillating gradient fields is reported to be infeasible. In thesestudies, LF phase measurements are modeled with radio frequency (RF) leakage due to geometric shifts in MR images. Although RF leakage is related withconductivity, we have not come across a conductivity image reconstructed using this model. In this study, LF conductivity imaging is evaluated for an MRIpulse sequence including multiple gradient pulses. ...
Low-cost microbolometer infrared detectors utilizing CMOS resistive layers
Öztürk, Hande; Akın, Tayfun; Department of Electrical and Electronics Engineering (2017)
This thesis presents the efforts to develop low-cost microbolometer type uncooled infrared detector architectures that utilize standard CMOS layers and components. Various resistance structures of different CMOS technologies are investigated and possible resistors are determined as the active material. In order to figure out potential microbolometer structure, all possible layers in the CMOS technologies are analyzed in terms of mechanical and thermal parameters. Mathematical modeling and computer simulatio...
High sensitivity and multifunctional micro-Hall sensors fabricated using InAlSb/InAsSb/InAlSb heterostructures
BANDO, M; OHASHİ, T; Dede, M.; Akram, R.; Oral, Ahmet; Park, S. Y.; SHİBASAKİ, I; HANDA, H; SANDHU, A (AIP Publishing, 2009-04-01)
Further diversification of Hall sensor technology requires development of materials with high electron mobility and an ultrathin conducting layer very close to the material's surface. Here, we describe the magnetoresistive properties of micro-Hall devices fabricated using InAlSb/InAsSb/InAlSb heterostructures where electrical conduction was confined to a 30 nm-InAsSb two-dimensional electron gas layer. The 300 K electron mobility and sheet carrier concentration were 36 500 cm(2) V(-1) s(-1) and 2.5 x 10(11)...
An Automated calibration set up for laser beam positioning systems in visual inspection applications
Kiraz, Ercan; Dölen, Melik; Department of Mechanical Engineering (2013)
In this study, a calibration setup for laser beam positioning systems used in visual inspection applications in industry is designed and manufactured. The laser positioning systems generate movable parallel laser lines on the projection surface. There are several translational and angular error sources affecting the positioning accuracy of the laser lines on the projection surface. Especially, since the laser line positioning error caused by angular error sources increases with the distance between the lase...
Instability studies in amorphous silicon based alloys
Özdemir, Orhan; Katırcıoğlu, Bayram; Department of Physics (2004)
The pixel element which is an integrated combination of a p-i-n diode with a thin film transistor (TFT) is used to produce image sensor arrays in scanning and displays technologies, necessitating the deposition of hydrogenated silicon based semiconducting and insulating thin films such as a-Si:H, a-SiNx:H over large area. The widely used techniques to achieve this goal is the plasma enhanced chemical vapor deposition (PECVD) due to its large area and low temperature (? 300 ?C) abilities. In particular, PECV...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
T. Takan, H. Keskin, and H. Altan, “Low-cost bandpass filter for terahertz applications,”
OPTICAL AND QUANTUM ELECTRONICS
, pp. 953–960, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37699.