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The Microwave Laboratory
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Walter Gordy
Adventures in the Submillimeter
Scientific Basis
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Scientific Basis
Scientific Basis
Introduction
Radiation and Matter
What Phenomena Fall in this Energy Range?
Gases, Liquids, and Solids
Applications and Impact of THz Spectroscopy
Theoretical Underpinnings
Absorption Strengths
Energy Levels and Transition Frequencies
The Character of Rotational Spectra
Rotation - Vibration Spectra
Millimeter and Submillimeter Techniques
Overview
Sources
Harmonic Generation and Frequency Multiplication
Sources Based on Mixing of Optical Sources
Tunable Sideband Sources
Electron Beam Sources
Femtosecond Sources
Detection & Noise
Noise
The Background Radiation
The Blackbody Background Noise
Townes Noise
Detectors
Spectroscopic Environments
Very Low Temperature Environments
Collisional Cooling (CC) of Neutrals -- an experimental technique
Ion Production Environments
Collisionally Cooled Ions
Applications
Atmospheric Spectroscopy
Microwave-Like Instruments
Infrared-Like Instruments
Astronomical Spectroscopy
Two Representative THz Telescopes
Submillimeter-Wave Astronomy Sattellite (SWAS)
Herschel Space Observatory
HIFI
Photoconductor Array Camera and Spectrometer
Spectral and Photometric Imaging Receiver
Summary
Examples of Other Results
Mapping the Galaxy with CO
Line Surveys
Laboratory Astrophysics
The Complete Experimental Spectra Method
Intensity Calibration
Analysis
A Line List Catalog
A Spectral Point-by-Point Catalog
QM Catalog Completeness
Frequencies
A Comparison of Laboratory and ALMA Spectra
A Simple Model
Spectral Comparisons
Methyl Cyanide
Ethyl Cyanide
Vinyl Cyanide
Methyl Formate, Dimethyl Ether, and Methanol
Intensities
Paths Forward
Analytical Spectroscopy
The Physics and Spectroscopy of the SMM/THz
The Core Spectrometer
Typical Results of the Core Spectrometer
SMM/THz Gas Sensors
Strategies and Design Space
The Doppler Limit
Gas Sample Handling and Preconcentration
Libraries
The Vacuum Preconcentration System
Sorbent Tubes and Sorbent Material Selection
Sensitivity
Imaging
Passive Terrestrial Systems
Outdoors at Relatively Low Frequency
Indoors and at High Frequency
Passive Arrays
Active Systems
Speckle
Arrays
Proximate Imaging
Methods for Reduction of Coherent Speckle
The Images
Speckle Contrast
Image of A Simple Object: Knife Covered with Cloth
Image of a Complex Object: OSU Physics Building Atrium
Mode Mixed Image of a Complex Object
Overview
Conclusions
Applications
Atmospheric Spectroscopy
Astronomical Spectroscopy
Analytical Spectroscopy
SMM/THz Gas Sensors
Imaging
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