Demonstration of a high-sensitivity and wide-dynamic-range terahertz graphene hot-electron bolometer with Johnson noise thermometry

2021 ◽  
Vol 118 (1) ◽  
pp. 013104
Author(s):  
W. Miao ◽  
F. M. Li ◽  
Z. Z. He ◽  
H. Gao ◽  
Z. Wang ◽  
...  
Keyword(s):  
Dynamic Range ◽  
High Sensitivity ◽  
Hot Electron ◽  
Johnson Noise ◽  
Wide Dynamic Range ◽  
Noise Thermometry ◽  
Hot Electron Bolometer ◽  
Johnson Noise Thermometry

scholarly journals Normal-Metal Hot-Electron Nanobolometer With Johnson Noise Thermometry Readout

2014 ◽  
pp. 1-6 ◽  
Author(s):  
Boris S. Karasik ◽  
Christopher B. McKitterick ◽  
Theodore J. Reck ◽  
Daniel E. Prober
Keyword(s):  
Normal Metal ◽  
Hot Electron ◽  
Johnson Noise ◽  
Noise Thermometry ◽  
Johnson Noise Thermometry

Slow-Scan CCD Observation of Backscattering Patterns in SEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1308-1309
Author(s):  
F. Ouyang ◽  
D. A. Ray ◽  
O. L. Krivanek
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Lens System ◽  
Wide Dynamic Range ◽  
Peltier Cooler ◽  
Diffraction Patterns ◽  
Scanning Electron

Electron backscattering Kikuchi diffraction patterns (BKDP) reveal useful information about the structure and orientation of crystals under study. With the well focused electron beam in a scanning electron microscope (SEM), one can use BKDP as a microanalysis tool. BKDPs have been recorded in SEMs using a phosphor screen coupled to an intensified TV camera through a lens system, and by photographic negatives. With the development of fiber-optically coupled slow scan CCD (SSC) cameras for electron beam imaging, one can take advantage of their high sensitivity and wide dynamic range for observing BKDP in SEM.We have used the Gatan 690 SSC camera to observe backscattering patterns in a JEOL JSM-840A SEM. The CCD sensor has an active area of 13.25 mm × 8.83 mm and 576 × 384 pixels. The camera head, which consists of a single crystal YAG scintillator fiber optically coupled to the CCD chip, is located inside the SEM specimen chamber. The whole camera head is cooled to about -30°C by a Peltier cooler, which permits long integration times (up to 100 seconds).

High-sensitivity and wide-dynamic-range 10 Gbit∕s APD∕preamplifier optical receiver module

2002 ◽  
Vol 38 (13) ◽  
pp. 650 ◽  
Author(s):  
H. Matsuda ◽  
A. Miura ◽  
H. Irie ◽  
S. Tanaka ◽  
K. Ito ◽  
...  
Keyword(s):  
Dynamic Range ◽  
High Sensitivity ◽  
Optical Receiver ◽  
Wide Dynamic Range ◽  
Receiver Module

scholarly journals The NIST Johnson Noise Thermometry System for the Determination of the Boltzmann Constant

2017 ◽  
Vol 122 ◽  
Author(s):  
Nathan E. Flowers-Jacobs ◽  
Alessio Pollarolo ◽  
Kevin J. Coakley ◽  
Adam C. Weis ◽  
Anna E. Fox ◽  
...  
Keyword(s):  
International System ◽  
Standard Uncertainty ◽  
Boltzmann Constant ◽  
Correlated Noise ◽  
Johnson Noise ◽  
Noise Thermometry ◽  
Relative Standard ◽  
System Of Units ◽  
Johnson Noise Thermometry

In preparation for the redefinition of the International System of Units (SI), five different electronic measurements of the Boltzmann constant have been performed using different Johnson noise thermometry (JNT) systems over the past seven years. In this paper, we describe in detail the JNT system and uncertainty components associated with the most recent National Institute of Standards and Technology (NIST) determination of the Boltzmann constant: k = 1.380642 9(69) × 10−23 J/K, with a relative standard uncertainty of 5.0 × 10−6 and relative offset of −4.05 × 10−6 from the Committee on Data for Science and Technology (CODATA) 2014 recommended value. We discuss the input circuits and the approach we used to match the frequency response of two noise sources. We present new measurements of the correlated noise of the 4 K on-chip resistors in the quantum-accurate, pseudorandom, voltage-noise source, which we used to estimate the correlated, frequency-dependent, nonthermal noise in our system. Finally, we contrast our system with those used in other measurements and speculate on future improvements.

scholarly journals Doubly resonant sub-ppt photoacoustic gas detection with eight decades dynamic range

2021 ◽  
Author(s):  
Zhen Wang ◽  
Hui Zhang ◽  
Qiang Wang ◽  
Simone Borri ◽  
Iacopo Galli ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Near Infrared ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Fast Response ◽  
Wide Dynamic Range ◽  
Acoustic Resonators ◽  
Light Waves ◽  
Energy Environment ◽  
Small Footprint

Abstract Gas sensors with high sensitivity, wide dynamic range, high selectivity, fast response, and small footprint are desirable across a broad range of applications in energy, environment, safety, and public health. However, designing a compact gas sensor with ultra-high sensitivity and ultra-wide dynamic range remains a challenge. Laser-based photoacoustic spectroscopy (PAS) is a promising candidate to fill this gap. Herein, we report a novel method to simultaneously enhance the acoustic and light waves for PAS using integrated optical and acoustic resonators. This increases sensitivity by more than two orders of magnitude and extends the dynamic range by more than three orders of magnitude, compared with the state-of-the-art photoacoustic gas sensors. We demonstrate the concept by exploiting a near-infrared absorption line of acetylene (C2H2) at 1531.59 nm, achieving a detection limit of 0.5 parts-per-trillion (ppt), a noise equivalent absorption (NEA) of 5.7×10-13 cm-1 and a linear dynamic range of eight orders of magnitude. This study enables the realization of compact ultra-sensitive and ultra-wide-dynamic-range gas sensors in a number of different fields.

scholarly journals DC-coupled burst-mode receiver with high sensitivity, wide dynamic range and short settling time for symmetric 10G-GPONs

2011 ◽  
Vol 19 (26) ◽  
pp. B594 ◽  
Author(s):  
Jasmien Put ◽  
Xin Yin ◽  
Xing-Zhi Qiu ◽  
Jan Gillis ◽  
Jochen Verbrugghe ◽  
...  
Keyword(s):  
Dynamic Range ◽  
High Sensitivity ◽  
Settling Time ◽  
Wide Dynamic Range ◽  
Burst Mode

A surface acoustic wave impedance-loaded high sensitivity sensor with wide dynamic range for ultraviolet light detection

2019 ◽  
Vol 296 ◽  
pp. 70-78 ◽  
Author(s):  
G. Ya. Karapetyan ◽  
V.E. Kaydashev ◽  
D.A. Zhilin ◽  
M.E. Kutepov ◽  
T.A. Minasyan ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Ultraviolet Light ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Wave Impedance ◽  
Wide Dynamic Range ◽  
Light Detection

scholarly journals Yohkoh Observations of Coronal Structures Surrounding Dark Filaments

1998 ◽  
Vol 167 ◽  
pp. 163-170
Author(s):  
Yutaka Uchida
Keyword(s):  
Image Analysis ◽  
High Latitude ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Event Structure ◽  
Point Of View ◽  
Coronal Structure ◽  
Wide Dynamic Range ◽  
Proper Understanding ◽  
Coronal Structures

AbstractWe describe in this paper some of the findings of the Yohkoh satellite about the coronal structure surrounding dark filaments in the pre-event and initial phases of high latitude arcade formation events. The knowledge of pre-event structure and its change is essential for the proper understanding of the arcade flaring process from the causality point of view. The wide dynamic range and high sensitivity obervations by Yohkoh allow us to look into the faint structures and their changes with the use of a faint-feature-enhancing technique in the image analysis.

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