scholarly journals Probing weak force-induced parity violation by high-resolution mid-infrared molecular spectroscopy

2013 ◽  
Vol 111 (14-15) ◽  
pp. 2363-2373 ◽  
Author(s):  
S. K. Tokunaga ◽  
C. Stoeffler ◽  
F. Auguste ◽  
A. Shelkovnikov ◽  
C. Daussy ◽  
...  
Keyword(s):  
High Resolution ◽  
Parity Violation ◽  
Molecular Spectroscopy ◽  
Mid Infrared ◽  
Weak Force

scholarly journals Broadband high-resolution molecular spectroscopy with interleaved mid-infrared frequency combs

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
A. V. Muraviev ◽  
D. Konnov ◽  
K. L. Vodopyanov
Keyword(s):  
High Resolution ◽  
Molecular Spectroscopy ◽  
Frequency Comb ◽  
Acquisition Time ◽  
Sampling Point ◽  
Dual Frequency ◽  
Mid Infrared ◽  
Frequency Combs ◽  
Spectral Bands ◽  
Primary Frequency

Abstract Traditionally, there has been a trade-off in spectroscopic measurements between high resolution, broadband coverage, and acquisition time. Originally envisioned for precision spectroscopy of the hydrogen atom in the ultraviolet, optical frequency combs are now commonly used for probing molecular ro-vibrational transitions throughout broad spectral bands in the mid-infrared providing superior resolution, speed, and the capability of referencing to the primary frequency standards. Here we demonstrate the acquisition of 2.5 million spectral data points over the continuous wavelength range of 3.17–5.13 µm (frequency span 1200 cm−1, sampling point spacing 13–21 MHz), via interleaving comb-tooth-resolved spectra acquired with a highly-coherent broadband dual-frequency-comb system based on optical subharmonic generation. With the original comb-line spacing of 115 MHz, overlaying eight spectra with gradually shifted comb lines we fully resolve the amplitude and phase spectra of molecules with narrow Doppler lines, such as carbon disulfide (CS2) and its three isotopologues.

scholarly journals Application of High-Speed Quantum Cascade Detectors for Mid-Infrared, Broadband, High-Resolution Spectroscopy

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5706
Author(s):  
Tatsuo Dougakiuchi ◽  
Naota Akikusa
Keyword(s):  
High Resolution ◽  
High Speed ◽  
Dynamic Range ◽  
Molecular Spectroscopy ◽  
Low Noise ◽  
Heterodyne Detection ◽  
High Resolution Spectroscopy ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Noise Characteristics

Broadband, high-resolution, heterodyne, mid-infrared absorption spectroscopy was performed with a high-speed quantum cascade (QC) detector. By strictly reducing the device capacitance and inductance via air-bridge wiring and a small mesa structure, a 3-dB frequency response over 20 GHz was obtained for the QC detector, which had a 4.6-μm peak wavelength response. In addition to the high-speed, it exhibited low noise characteristics limited only by Johnson–Nyquist noise, bias-free operation without cooling, and photoresponse linearity over a wide dynamic range. In the detector characterization, the noise-equivalent power was 7.7 × 10−11 W/Hz1/2 at 4.6 μm, and it had good photoresponse linearity up to 250 mW, with respect to the input light power. Broadband and high-accuracy molecular spectroscopy based on heterodyne detection was demonstrated by means of two distributed-feedback 4.5-μm QC lasers. Specifically, several nitrous oxide absorption lines were acquired over a wavelength range of 0.8 cm−1 with the wide-band QC detector.

scholarly journals Morphokinematic properties of the 21 micron source IRAS 22272+5435

2011 ◽  
Vol 7 (S283) ◽  
pp. 458-459
Author(s):  
Jun-ichi Nakashima ◽  
Sun Kwok ◽  
Bosco H. K. Yung ◽  
Yong Zhang ◽  
Nico Koning ◽  
...  
Keyword(s):  
High Resolution ◽  
Angular Size ◽  
Mid Infrared ◽  
Preliminary Results ◽  
Molecular Envelope

AbstractWe obtained a high-resolution CO map of IRAS 22272+5435 in the CO J = 2–1 line using CARMA. The target exhibits a second biggest angular size of the circumstellar molecular envelope among known 21 μm sources. In the preliminary results, we found that the CO properties of IRAS 22272+5435 is clearly different from those of IRAS 07134+1005, which is another well-investigated 21 μm source. For example, elongations seen in the mid-infrared and CO images are extended in mutually perpendicular directions, although in case of IRAS 07134+1005 the CO feature coincides well with the mid-infrared structure.

scholarly journals HIGH-RESOLUTION MID-INFRARED SPECTROSCOPY OF NGC 7538 IRS 1: PROBING CHEMISTRY IN A MASSIVE YOUNG STELLAR OBJECT

2009 ◽  
Vol 696 (1) ◽  
pp. 471-483 ◽  
Author(s):  
Claudia Knez ◽  
John H. Lacy ◽  
Neal J. Evans ◽  
Ewine F. van Dishoeck ◽  
Matthew J. Richter
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Stellar Object ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Young Stellar Object

A New Capability for Light Microscopes: Mid infrared Molecular Analysis

2003 ◽  
Vol 11 (4) ◽  
pp. 16-21
Author(s):  
Alan J. Rein
Keyword(s):  
Molecular Analysis ◽  
Infrared Radiation ◽  
Molecular Spectroscopy ◽  
Mid Infrared ◽  
Ft Ir

The merger of molecular spectroscopy with microscopy is certainly not a new concept. Microscope attachments for FT-IR spectrometers have been available for nearly two decades and there are literally thousands of FT-IR spectrometers with these devices currently installed. The vast majority of them are applied to contaminant or forensic oriented problems. As such, the microscopes are often used as sophisticated beam condensers, enabling the spectrometer to focus infrared radiation on the samples that are typically larger than 10 microns.

scholarly journals TEXES: A Sensitive High‐Resolution Grating Spectrograph for the Mid‐Infrared

2002 ◽  
Vol 114 (792) ◽  
pp. 153-168 ◽  
Author(s):  
J. H. Lacy ◽  
M. J. Richter ◽  
T. K. Greathouse ◽  
D. T. Jaffe ◽  
Q. Zhu
Keyword(s):  
High Resolution ◽  
Mid Infrared

scholarly journals Analysis of new species retrieved from MIPAS

2014 ◽  
Vol 56 ◽  
Author(s):  
Shaomin Cai ◽  
Anu Dudhia
Keyword(s):  
Fourier Transform ◽  
New Species ◽  
High Resolution ◽  
Trace Gases ◽  
Michelson Interferometer ◽  
Emission Spectra ◽  
Fourier Transform Spectrometer ◽  
Mid Infrared ◽  
The Third ◽  
Atmospheric Sounding

The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument which operated on the Envisat satellite from 2002-2012 is a Fourier transform spectrometer for the measurement of high-resolution gaseous emission spectra at the Earth's limb. It operates in the near- to mid-infrared, where many of the main atmospheric trace gases have important emission features. The initial operational products were profiles of Temperature, H2O, O3, CH4, N2O, HNO3, and NO2, and this list was recently extended to include N2O5, ClONO2, CFC-11 and CFC-12. Here we present preliminary results of retrievals of the third set of species under consideration for inclusion in the operational processor: HCN, CF4, HCFC-22, COF2 and CCl4.

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