Infrared and Millimeter Waves, Volume 16: Electromagnetic Waves in Matter, Part III deals with electromagnetic devices based on infrared and millimeter waves. This book covers infrared optoacoustics; freestanding fine-wire grids for use in millimeter- and submillimeter-wave spectroscopy; and population inversion and far-infrared (FIR) emission of hot electrons in semiconductors. The theory on distributed feedback lasers with weak and strong modulations is also considered.
This monograph is comprised of six chapters and begins with a discussion on the optoacoustic effect in the infrared, with emphasis on where optoacoustics and infrared physics combine in the areas of Fourier spectroscopy, optically pumped FIR lasers, and photothermal non-destructive remote material evaluation. The next chapter presents the basic principles of the theory on distributed feedback lasers with weak and strong modulations, together with results of analytical and numerical calculations. The following chapters focus on the construction of freestanding fine-wire grids for use in millimeter- and submillimeter-wave spectroscopy; general equations for the mean distance between impurity ions in solid-state devices, signal vectors in communication theory, and stars in the solar neighborhood; and prospects for hot-carrier systems in active FIR solid-state devices. The final chapter is devoted to quenched germanium and its FIR optical properties.
This text will be a valuable resource for physicists and electronics and electrical engineers.

List of ContributorsPrefaceChapter 1 Infrared Optoacoustics I. Introduction II. Optoacoustics and Infrared Fourier Spectroscopy III. Optoacoustics and Optically Pumped Far-Infrared Gas Lasers IV. Remote Optoacoustic Detection: Photothermal Infrared Radiometry V. Future Trends in Infrared Optoacoustics ReferencesChapter 2 Theory on Distributed Feedback Lasers with Weak and Strong Modulations I. Introduction II. Wave Equation III. Infinite DFB Structures IV. Semi-Infinite DFB Structures V. Finite DFB Structures VI. Conclusions Appendix A: Identities of Reflection and Transmission Coefficients Appendix B: Derivation of the Resonance Condition ReferencesChapter 3 Freestanding Fine-Wire Grids for Use in Millimeter and Submillimeter-Wave Spectroscopy I. Introduction II. Theories of Scattering III. Construction of Wire Grids IV. Comparison of Calculated and Measured Performance V. Applications VI. Future Developments Appendix: Calculated Characteristic Curves for Grid Performance in Various Configurations ReferencesChapter 4 Mean Distance between Impurity Ions in Solid-State Devices, Signal Vectors in Communication Theory, and Stars in the Solar Neighborhood I. Introduction II. Probability Calculation III. Monte Carlo Method IV. Spacing of Impurities in Solid-State Devices V. Application to Communication Theory VI. Application to Stellar Statistics VII. Conclusions Appendix A: The lth Nearest Neighbor in an M-Dimensional Space Appendix B: "NEWSTAR3" Appendix C: "NEIGHBORS7" ReferencesChapter 5 Population Inversion and Far-Infrared Emission of Hot Electrons in Semiconductors I. Introduction II. Bulk Ballistic Heating and Population Inversion of Hot Carriers in Semiconductors III. Processes of FIR Emission by Hot Carriers IV. Investigation of Hot Carriers in Germanium by Spontaneous FIR Emission V. Tunable Stimulated Millimeter and FIR Emission by Hot Carriers in Germanium VI. Hot-Electron Intervalley Transfer and Submillimeter Waves VII. Concluding Remarks ReferencesChapter 6 Far-Infrared Optical Properties of Quenched Germanium I. Introduction II. Acceptor in Germanium III. Photothermal Ionization Spectroscopy IV. Sample Preparation and Results of Hall-Effect Measurement V. Far-Infrared Optical Properties VI. Model VII. Application VIII. Summary and Conclusion ReferencesIndex