loading
Mesa structured photoconductive antennas for 1.5 µm: All-fibre THz-TDS spectroscopy beyond 4 THz
2010 Edition, September 1, 2010 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Photoconductive antennas (PCAs) based on InGaAs/InAlAs for operation at 1.5 µm are improved by employing special structuring techniques, i.e. mesa etching. The detected THz amplitude is increased by a factor of over 27. The spectra show a...

Mesa-structured InGaAs/InAlAs photoconductive antennas for THz time domain systems operated at 1.5 µm
2010 Edition, May 1, 2010 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Mesa-structuring of InGaAs/InAlAs photoconductive layers has been employed for improving THz antennas. The developed devices are evaluated in a time domain spectrometer operating at 1.5 µm wavelengths. Order-of-magnitude improvements versus planar...

Fiber-coupled terahertz TDS combining high speed operation with superior dynamic range
2012 Edition, September 1, 2012 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Highly efficient mesa-structured 1.5 µm photoconductive antennas, direct detection without lock-in amplifier, and a voice-coil mirror drive with accurate position sensor are merged to a fast and precise system. A pulse trace of 25 ps is measured every 50 ms, and...

Analysis of a photoconductive antenna using COMSOL
2017 Edition, September 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this work we present numerical investigations of a novel terahertz (THz) photoconductive antenna with embedded electrodes using COMSOL Multiphysics software package. Simulation results indicate that the proposed THz antenna can store two times more effective...

Optically Driven Terahertz Wave Modulator Using Ring-Shaped Microstripline With GaInAs Photoconductive Mesa Structure
2017 Edition, Volume 23, July 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

To improve wireless communications systems, it is desirable to seamlessly combine fiber-based optical and terahertz wireless communications systems. In this paper, we demonstrate a waveguide optically driven terahertz wave modulator using a ring-shaped microstripline with a GaInAs...

Simulation of THz photoconductive antennas loaded by different metallic nanoparticles
2016 Edition, December 1, 2016 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper, we study the effect of different metallic nanoparticles loaded in the gap of a silicon-on-sapphire (SOS) photoconductive antenna. Three different metals (Au, Ag, and Al) are considered as the material of the nanostructures which were loaded in the gap of a...

Quantum Dot-Based Terahertz photoconductive antennas
2014 Edition, June 1, 2014 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We present novel Terahertz (THz) emitting optically pumped Quantum Dot (QD) photoconductive (PC) materials and antenna structures on their basis both for pulsed and CW pumping regimes.

Photoelectric Properties of InAs/GaAs Quantum Dot Photoconductive Antenna Wafers
2018 Edition, Volume 24, March 1, 2018 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper, the study of the photoconductivity in self-assembled InAs/GaAs quantum dot photoconductive antenna in the wavelength region between 1140 nm and 1250 nm at temperatures ranging from 13 to 400 K is reported. These antennas are aimed to work in conjunction...

Improving photoconductive THz antennas for 1.5 µm operation
2010 Edition, January 1, 2010 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Terahertz antennas for 1.5 μm operation are improved by mesa-etching of the InGaAs/InAlAs photoconductive layers. The performance in terms of dark current, signal amplitude and bandwidth has been improved significantly.

Electrode width dependent performance of THz photoconductive emitters
2016 Edition, September 1, 2016 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Strip line geometries are important for modern large area photoconductive terahertz (THz) emitters with interdigitated electrode designs. Strip line structures with varying electrode widths have been studied for photoconductive terahertz emission. The...

Advertisement