Friday, 16 February 2018

Call for Papers – 43rd International Conference on Infrared, Millimeter and Terahertz Waves

We are very happy to announce that the 43rd International Conference on Infrared, 
Millimeter and Terahertz Waves (IRMMW-THz 2018) is now open for accepting submissions
of one-page abstracts. The deadline is March 31st, 2018.

IRMMW-THz 2018 will be held in Nagoya, Japan during September 9-14, 2018.
The conference venue is Nagoya Congress Center. Nagoya city is the 4th largest city in Japan,
and the venue is located within 4 km (or 10 min by train) from the downtown of the city.
The access from the Chubu Centrair International Airport in Nagoya is very convenient,
and it takes about 30-40 minutes by the express trains. For more detail,
please visit our website http://irmmw-thz2018.org/index.html.

Topics at the conference include, but are not strictly limited to:
1.    Astronomy, Planetary and Environmental Science
2.    Applications in Biology and Medicine
3.    Applications in Industry, Security and Inspection
4.    Spectroscopy and Material Properties
5.    Spectroscopy of Gases, Liquids, and Solids
6.    Sources, Detectors, and Receivers
7.    Imaging and Remote Sensing
8.    Modeling and Analysis Techniques
9.    Metamaterial Structures and Applications
10.    Devices, Components, and Systems
11.    High-Field THz Wave Generation and Nonlinear THz Physics
12.    MM and sub-MM wave systems
13.    Laser Driven THz Sources
14.    Quantum Cascade Lasers
15.    Gyro-Oscillators and Amplifiers
16.    Free Electron Lasers and Synchrotron Radiation
17.    Ultrafast Measurements
18.    Metrology
19.    MMW and THz Wave Radar and Communications
20.    2D Materials for MMW, THz, IR Applications

We are very much looking forward to welcoming you to Nagoya for a week
with 300+ exciting talks and plentiful poster sessions reporting on the latest advances in this field,
as well as technical exhibits with the newest THz technology and networking with your old and
new colleagues in the largest forum for IR, millimeter and terahertz wave science and technology !

Best wishes

Dr. Toshitaka Idehara
Dr. Masahiko Tani
Chairs of IRMMW-THz 2018 (Nagoya, Japan)
http://irmmw-thz2018.org

Tuesday, 13 February 2018

Presentation at IFPAC 2018

Dissolution Modeling of a Controlled Release Osmotic Tablet using Terahertz Pulsed Imaging (TPI): A Chemometric Approach 


Zach Dance1, Brian Regler1, Donna Carroll1, Busolo Wabuyele1, Jerry Klinzing1, Jim DiNunzio1, Gary Chia1, Lee Dowden1, Gerard Bredael1, David Harris1, Zhihao Lin1, Phil Taday2
[1Merck & Co., Inc., 2TeraView Ltd.]

see https://www.xcdsystem.com/IFPAC/program/sEg2Mf6/index.cfm

Abstract: 

Push-pull osmotic tablets are currently being developed for controlled release of compound A in order to provide once daily dosing. The release rate of compound A from the osmotic tablet has been found to be largely controlled by the coating thickness. Terahertz pulsed imaging (TPI) uses short pulses of terahertz radiation (2-120 cm-1) that penetrate typical pharmaceutical components. The time delay of reflections of these pulses from materials of different refractive indexes in the sample allows for the measurement of thickness of various materials. Using TPI, the coating thickness of compound A osmotic tablets can be measured in a rapid, non-destructive manner across an entire tablet. The coating thickness data obtained using TPI was found to be in line with other analysis techniques such as XRCT. Combining the dissolution release rate data from products designed to provide different drug release rates through modification of coating weight, a chemometric model was developed to predict release rate as a function of coating thickness.


Monday, 12 February 2018

The Impact of Interference from the Side Lanes on mmWave/THz Band V2V Communication Systems with Directional Antennas

Petrov, Vitaly, Joonas Kokkoniemi, Dmitri Moltchanov, Janne Lehtomaki, Markku Juntti, and Yevgeni Koucheryavy. "The Impact of Interference from the Side Lanes on mmWave/THz Band V2V Communication Systems with Directional Antennas." IEEE Transactions on Vehicular Technology(2018).


Abstract:

Communications systems operating in the millimeter and terahertz band have been recently suggested to enable high data-rate vehicle-to-vehicle communications in future networks. However, massive deployment of such systems may lead to significant interference, affecting the performance of information transmission. While the multipath interference caused by the signal reflections from the road has been extensively discussed in literature, the interference caused by the vehicles on the side lanes has been insufficiently studied so far. In this paper, using a combination of measurement, simulation, and analytical methods we comprehensively characterize the interference from the side lanes in two typical deployments including highway and urban road environments for millimeter and low terahertz bands. Both the multipath interference and direct interference from the transmitting vehicles on the side lanes are taken into account. As a result of the presented study, we reveal that: i) the interference from the side lanes can be well approximated using two-dimensional stochastic models without any notable loss of accuracy; and ii) even when highly directional antennas are used there are special spatial configurations, where the interference may greatly affect the communication systems performance. We lately apply the developed models to estimate the signal-to-interference ratio and link capacity of mmWave/THz band V2V communications with directional antennas.



To measure the signal losses, we used the TeraView TeraPulse 4000 [46] platform, based on THz time domain spectroscopy (THz-TDS) … 


For full paper see http://ieeexplore.ieee.org/abstract/document/8272491/
for more information about TeraView is https://www.azom.com/article.aspx?ArticleID=14796

Friday, 2 February 2018

Terahertz Bandpass Filter Based on Frequency Selective Surface

Li, Jiu-Sheng, Yang Li, and Le Zhang. "Terahertz Bandpass Filter Based on Frequency Selective Surface." IEEE Photonics Technology Letters 30, no. 3 (2018): 238-241.

Abstract:
We designed a terahertz bandpass filter based on double-layer frequency selective surface. Details of the proposed terahertz wave filter design and of the related parametric analysis are presented and discussed. The proposed terahertz filter was fabricated by laser technology. The transmission spectrum was characterized by terahertz time-domain spectroscopy. The results show that the center frequency of the terahertz filter is about 1 THz with 3-dB bandwidth of 400 GHz.
for full paper see http://ieeexplore.ieee.org/document/8194866/
for more information about TeraView is https://www.azom.com/article.aspx?ArticleID=14796

Plasmonic Nanodisk Thin-Film Terahertz Photoconductive Antenna

Burford, Nathan M., Michael J. Evans, and Magda O. El-Shenawee. "Plasmonic Nanodisk Thin-Film Terahertz Photoconductive Antenna." IEEE Transactions on Terahertz Science and Technology (2017).

Abstract:

This paper presents the design, fabrication, and measurement of a plasmonic thin-film terahertz photoconductive antenna. Conventional terahertz photoconductive antennas suffer from poor optical-to-terahertz conversion efficiency, often on the order of 10−4. This is due to the low quantum efficiency of the device. The goal of this work is to demonstrate enhanced terahertz emission from a plasmonic thin-film device architecture. The combination of plasmonic nanodisks, a 120-nm low-temperature-grown gallium arsenide thin-film, and a bottom-located bowtie antenna has demonstrated the feasibility of producing such devices. Fabrication attempts and failure analysis is discussed in this work. Experimental characterization measuring the peak-to-peak electric field values of the terahertz pulses emitted from the device prototypes showed approximately five times improvement in plasmonic thin-film devices compared to conventional devices. The plasmonic thin-film devices had a measureable terahertz bandwidth of ∼5 THz. This indicates that the plasmonic thin-film architecture has a potential for producing high optical-to-terahertz conversion efficiencies across a wide frequency range.
for full paper see http://ieeexplore.ieee.org/abstract/document/8239849/
for more information about TeraView is https://www.azom.com/article.aspx?ArticleID=14796