Laser Terahertz Emission Spectroscopy of Graphene/InAs Junctions

2015 ◽  
Vol 1808 ◽  
pp. 1-7
Author(s):  
Filchito Renee Bagsican ◽  
Jofferson Gonzales ◽  
Xiang Zhang ◽  
Lulu Ma ◽  
Iwao Kawayama ◽  
...  
Keyword(s):  
Emission Spectroscopy ◽  
Laser Excitation ◽  
Excitation Power ◽  
Monolayer Graphene ◽  
Thz Radiation ◽  
Radiation Mechanism ◽  
Uv Illumination ◽  
Dember Effect ◽  
Terahertz Emission Spectroscopy ◽  
Surge Current

ABSTRACTWe applied laser THz emission spectroscopy to study the effects of monolayer graphene on the THz emission from InAs. THz emission from graphene/InAs varies linearly with the laser excitation power in the low-intensity excitation regime. We found that unlike in graphene/SI-InP junctions, graphene and O2 adsorbates on graphene have no significant effect on the THz emission from graphene/InAs junctions because the THz radiation mechanism in InAs is by the photo-Dember effect, whereas for SI-InP is by the surge current effect. There is also a slight enhancement in the THz emission from both bare InAs and graphene/InAs by UV illumination, which is probably due to the additional photoexcited carriers by UV that somehow enhances the photo-Dember field.

scholarly journals Излучательная эффективность терагерцовых антенн с традиционной топологией и металлической метаповерхностью: сравнительный анализ

2020 ◽  
Vol 129 (7) ◽  
pp. 1012
Author(s):  
Д.В. Лаврухин ◽  
А.Э. Ячменев ◽  
И.А. Глинский ◽  
Н.В. Зенченко ◽  
Р.А. Хабибуллин ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Laser Excitation ◽  
Emission Spectra ◽  
Excitation Power ◽  
Thz Radiation ◽  
Thermal Breakdown ◽  
Emission Power ◽  
Energy Characteristics ◽  
Photoconductive Antennas ◽  
Average Laser

We report on experimental study of the photoconductive antennas (PCA)-emitters featuring conventional topology as well as metallic metasurface with plasmonic grating, based on the InGaAs/InAlAs superlattices. We measure and determine the photocurrents and the emission spectra of the PCAs, as well as the energy characteristics of the terahertz (THz) radiation, and the efficiency of the optical-to-THz conversion for different bias voltages and average laser excitation power. The integral THz emission power of 10 μW as well as conversion efficiency of 0.2% are demonstrated for the PCA with the metasurface, which are not reachable for the conventional due to thermal breakdown of the antenna. Therefore, the PCAs with the metasurface can be considered to be the attractive THz emitters that can potentially become among the elemental base for modern THz spectroscopic systems for biomedical applications.

Studies of interface polarization and magnetization dynamics using terahertz emission spectroscopy

2005 ◽  
Author(s):  
Shayne M. Harrel ◽  
James M. Schleicher ◽  
Eric Beaurepaire ◽  
Jean-Yves Bigot ◽  
Charles A. Schmuttenmaer
Keyword(s):  
Emission Spectroscopy ◽  
Magnetization Dynamics ◽  
Terahertz Emission ◽  
Interface Polarization ◽  
Terahertz Emission Spectroscopy

Helicity-dependent photocurrent in a Bi2Se3 thin film probed by terahertz emission spectroscopy

2016 ◽  
Vol 94 (16) ◽  
Author(s):  
Sun Young Hamh ◽  
Soon-Hee Park ◽  
Sahng-Kyoon Jerng ◽  
Jae Ho Jeon ◽  
Seung-Hyun Chun ◽  
...  
Keyword(s):  
Thin Film ◽  
Emission Spectroscopy ◽  
Terahertz Emission ◽  
Terahertz Emission Spectroscopy

scholarly journals Determination of the time origin by 
the maximum entropy method in 
time-domain terahertz emission spectroscopy

2010 ◽  
Vol 18 (15) ◽  
pp. 15853 ◽  
Author(s):  
Takeya Unuma ◽  
Yusuke Ino ◽  
Makoto Kuwata-Gonokami ◽  
Erik M. Vartiainen ◽  
Kai-Erik Peiponen ◽  
...  
Keyword(s):  
Maximum Entropy ◽  
Time Domain ◽  
Emission Spectroscopy ◽  
Maximum Entropy Method ◽  
Entropy Method ◽  
Terahertz Emission ◽  
Terahertz Emission Spectroscopy ◽  
Time Origin

Characterization of Magnetization Dynamics using Terahertz Emission Spectroscopy

2007 ◽  
pp. 793-795
Author(s):  
James M. Schleicher ◽  
Shayne M. Harrel ◽  
Charles A. Schmuttenmaer ◽  
Eric Beaurepaire ◽  
Jean-Yves Bigot
Keyword(s):  
Emission Spectroscopy ◽  
Magnetization Dynamics ◽  
Terahertz Emission ◽  
Terahertz Emission Spectroscopy

Photoluminescence properties of Cu-doped CdTeSe alloyed quantum dots versus laser excitation power and temperature

2020 ◽  
Vol 218 ◽  
pp. 116838 ◽  
Author(s):  
N.T. Hien ◽  
P.M. Tan ◽  
H.T. Van ◽  
V.T.K. Lien ◽  
P.V. Do ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laser Excitation ◽  
Excitation Power ◽  
Photoluminescence Properties
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