Study of Infrared Nonlinear Processes in Semiconductors - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Study of Infrared Nonlinear Processes in Semiconductors write by Peter A. Wolff. This book was released on 1988. Study of Infrared Nonlinear Processes in Semiconductors available in PDF, EPUB and Kindle. This program includes: 1.) Demonstration that phase transitions and electrical instabilities enhance optical nonlinearities in semiconductors. 2.) Discovery of exceedingly large third order optical nonlinearities CUBED CHI . 0.001 ESU with picosecond response time in zero gap materials (HgTe, HgCdTe, HgMnTe). 3.) First observation of impurity-induced optical nonlinearity in semiconductors. 4.) Prediction and observation of negative absolute carrier mobilities in quantum wells. (RH).
Scientific and Technical Aerospace Reports
Scientific and Technical Aerospace Reports - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Scientific and Technical Aerospace Reports write by . This book was released on 1987. Scientific and Technical Aerospace Reports available in PDF, EPUB and Kindle.
Optical Properties of Small Band Gap Semiconductors Subject to Laser Excitation. Nonlinear Infrared Properties of Semiconductors
Optical Properties of Small Band Gap Semiconductors Subject to Laser Excitation. Nonlinear Infrared Properties of Semiconductors - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Optical Properties of Small Band Gap Semiconductors Subject to Laser Excitation. Nonlinear Infrared Properties of Semiconductors write by T. C. McGill. This book was released on 1982. Optical Properties of Small Band Gap Semiconductors Subject to Laser Excitation. Nonlinear Infrared Properties of Semiconductors available in PDF, EPUB and Kindle. A theoretical and experimental study of the optical properties of small band gap semiconductors subject to laser excitation and the nonlinear infrared properties of small band gap semiconductors subject to laser excitation and the nonlinear infrared properties of semiconductors has been carried out. These studies have led to an understanding of the nonradiative recombination mechanisms due to impurities via an Auger process. Predictions about the role of radiative and nonradiative processes in narrow band gap semiconductors have been made. Experiments performed on HgCdTe alloys with different composition provided the first systematic study of photoluminescence in these alloys and gave data that supported the conclusions on the relative importance of radiative and nonradiative processes in alloys. The study of the nonlinear infrared properties in the semiconductors resulted in the first complete theory of the phenomenon. Experiments to measure the role of impurities on the saturation intensity have given results in good agreement with theory. (Author).
Scientific and Technical Aerospace Reports
Scientific and Technical Aerospace Reports - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Scientific and Technical Aerospace Reports write by . This book was released on 1986. Scientific and Technical Aerospace Reports available in PDF, EPUB and Kindle.
Nonlinear Optical Processes in Two-Dimensional Semiconductor Structures
Nonlinear Optical Processes in Two-Dimensional Semiconductor Structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nonlinear Optical Processes in Two-Dimensional Semiconductor Structures write by Yongrui Wang. This book was released on 2015. Nonlinear Optical Processes in Two-Dimensional Semiconductor Structures available in PDF, EPUB and Kindle. The optical properties of two types of two-dimensional (2D) semiconductor structures are studied. One of them is for structures based on quantum wells (QWs), and the other is graphene. We study the dynamics of optically excited electron-hole plasma or magnetoplasma in uncoupled QW structure. Experimentally we have observed a delayed burst of optical pulse, or super fluorescence (SF). Time and energy-resolved measurement shows the center frequency of the pulse is red-shifting with time. We explain this by developing the generalized semiconductor Bloch equations (SBEs), where Coulomb interaction between electrons is taken into account. For electronhole plasma in quasi-equilibrium, the calculation shows the peak gain is near the Fermi-edge. So, the red-shifting is because of the decreasing of Fermi energy with time. The effect of Coulomb interaction in intersubband transitions is also studied, where we have developed equations similar to the SBEs, and show that the Coulomb effect could enhance particular second-order nonlinear optical processes. Quantum cascade lasers (QCLs) are well developed devices based on QWs. We study the active modulation in mid-infrared (mid-IR) QCLs. We show that QCLs with short gain recovery time can also generate short pulses by active modulation, while it is previously thought active modulation can only be applied for QCLs with long gain recovery time. Comparisons between the two cases show the performance of QCLs with short gain recovery time is more robust for active modulation. Also, mode-locking can be achieved by tuning the modulation period. As a natural 2D material, graphene has linear energy dispersion near the Dirac points. This leads to interesting electronic and optical properties. Under Landau quantization, we propose a scheme for achieving continuous-wave terahertz (THz) gain by mid-IR pumping. In this scheme, scattering of surface-optical (SO) phonons from the substrate is utilized to populate the upper laser state. All the important scattering processes are calculated to justify the design. We also study the properties of second-harmonic generation (SHG) in graphene without magnetic field. The experimental measurement shows peculiar relations between the polarizations of fundamental light and second-harmonic (SH) light. We develop a quantum theory to explain the observations. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155620
