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In this work, we propose a prototype set-up exploiting terahertz time-domain spectroscopy (THz-TDS) to investigate gaseous compounds. The system is portable and allows to perform remote measurements. We used the prototype to characterise…

Identifying terrestrial planets in the habitable zones (HZs) of other stars is one of the primary goals of ongoing radial velocity and transit exoplanet surveys and proposed future space missions. Most current estimates of the boundaries of…

Empirical studies of the first generation of stars and quasars in the Universe will likely become feasible over the next decade. The Next Generation Space Telescope will provide direct imaging and photometry of sub-galactic objects at…

Astrophysics · Physics 2009-10-31 Zoltan Haiman , Avi Loeb

In the ROSAT era of the mid-1990's, the problems facing deep X-ray surveys could be largely solved with 10 m class telescopes. In the first decade of this new millennium, with X-ray telescopes such as the Chandra X-ray Observatory and…

Astrophysics · Physics 2009-11-07 Ann E. Hornschemeier

The new generation of 8 to 10m class telescope is providing us with high-quality spectral information on the rest-frame ultraviolet region of star-forming galaxies at cosmological distances. The data can be used to address questions such…

Astrophysics · Physics 2015-05-13 Claus Leitherer

Ground-based adaptive optics (AO) in the infrared has made exceptional advances in approaching space-like image quality at higher collecting area. Optical-wavelength applications are now also growing in scope. We therefore provide here a…

Instrumentation and Methods for Astrophysics · Physics 2009-09-25 Matt Mountain , Roeland van der Marel , Remi Soummer , Anton Koekemoer , Harry Ferguson , Marc Postman , Donald T. Gavel , Olivier Guyon , Douglas Simons , Wesley A. Traub

We introduce THz Stark spectroscopy by using intense single-cycle terahertz pulses as the electric field source and monitoring the induced spectral response of an isotropic molecular ensemble with a coincident femtosecond supercontinuum…

Terahertz (THz) communications are celebrated as key enablers for converged localization and sensing in future sixth-generation (6G) wireless communication systems and beyond. Instead of being a byproduct of the communication system,…

Signal Processing · Electrical Eng. & Systems 2022-11-16 Hui Chen , Hadi Sarieddeen , Tarig Ballal , Henk Wymeersch , Mohamed-Slim Alouini , Tareq Y. Al-Naffouri

We present a feasibility study of the Antarctic 12m Terahertz Telescope (ATT12), a next-generation facility to be constructed at New Dome Fuji in Antarctica, designed to open up the FIR and THz windows for extragalactic astronomy. While…

Terahertz (THz) band communications are envisioned as a key technology for 6G and Beyond. As a fundamental wireless infrastructure, THz communication can boost abundant promising applications. In 2014, our team published two comprehensive…

Signal Processing · Electrical Eng. & Systems 2022-04-28 Ian F. Akyildiz , Chong Han , Zhifeng Hu , Shuai Nie , Josep M. Jornet

Terahertz technology has made significant advances in the fields of spectroscopy, imaging and, more recently, wireless communications. In the latter, the use of this frequency band between 0.1 and 10 THz becomes extremely attractive due to…

Emerging Technologies · Computer Science 2018-01-12 Sergi Abadal , Seyed E. Hosseininejad , Albert Cabellos-Aparicio , Eduard Alarcón

The brightness of a light source defines its applicability to nonlinear phenomena in science. Bright low frequency terahertz (< 5THz) radiation confined to a diffraction-limited spot size is a present hurdle due to the broad bandwidth and…

Optics · Physics 2014-07-08 Mostafa Shalaby , Christoph P. Hauri

Terahertz (THz) band (0.1-10 THz) possesses multi-gigahertz continuous bandwidth resources, making it a promising frequency band for high-speed wireless communications and environment sensing. The interaction between the THz wave and the…

Signal Processing · Electrical Eng. & Systems 2024-11-20 Weijun Gao , Chong Han

Benefiting from the ultra-wide bandwidth, terahertz (THz) communication is becoming a promising technology for future 6G networks. For THz communication, precoding is an essential technique to overcome the severe path loss of THz signals in…

Information Theory · Computer Science 2020-05-22 Jingbo Tan , Linglong Dai

Thanks to the vast amount of available resources and unique propagation properties, terahertz (THz) frequency bands are viewed as a key enabler for achieving ultrahigh communication performance and precise sensing capabilities in future…

Signal Processing · Electrical Eng. & Systems 2025-01-08 Tommaso Zugno , Cristina Ciochina , Sharad Sambhwani , Patrick Svedman , Luis M. Pessoa , Ben Chen , Per Hjalmar Lehne , Mate Boban , Thomas Kürner

Terahertz (THz) lasers on optically pumped multiple-graphene-layer (MGL) structures as their active region are proposed and evaluated. The developed device model accounts for the interband and intraband transitions in the degenerate…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 V. Ryzhii , A. A. Dubinov , T. Otsuji , V. Mitin , M. S. Shur

Planets residing in circumstellar habitable zones (CHZs) offer our best opportunities to test hypotheses of life's potential pervasiveness and complexity. Constraining the precise boundaries of habitability and its observational…

Earth and Planetary Astrophysics · Physics 2019-12-25 Howard Chen , Eric T. Wolf , Zhuchang Zhan , Daniel E. Horton

Ground-based telescopes coupled with adaptive optics (AO) have been playing a leading role in exoplanet direct imaging science and technological development for the past two decades and will continue to have an indispensable role for the…

Imaging applications in the terahertz (THz) frequency range are severely restricted by diffraction. Near-field scanning probe microscopy is commonly employed to enable mapping of the THz electromagnetic fields with sub-wavelength spatial…

High redshift (z >~ 1) clusters are ideal probes to study the formation and evolution of large scale structures and galaxies in the universe. A 10-m class ground based telescope, X-ray observatories (Chandra, XMM-Newton) and HST/ACS are…

Astrophysics · Physics 2009-11-13 R. Demarco , H. C. Ford , P. Rosati