Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Mid-infrared (mid-IR)"”.
-
Mid-IR plasmon-mediated photoluminescence from gallium-doped zinc oxide bow-tie nanoantennas
Semiconductor devices that interact with mid-infrared (mid-IR) wavelengths have a variety of applications in communications, sensing, and defense. However, most mid-IR sources, particularly incoherent emitters, are practically limited as a result of significant non-radiative losses. One proposed …
-
SPECTROSCOPIC STUDY OF ICES WITH ASTROPHYSICAL INTEREST
… Surface Science Laboratory. I have studied the mid-infrared (Mid-IR) bands of thin films of pure CH4 ices and of CH4 ices mixed with N2 and H2O in order to characterize the thermal evolution of ices in confined geometry and to improve the understanding of observations of ices present in …
-
Frequency Selective Detection of Infrared Radiation in Uncooled Optical Nano-Antenna Array
Mid-infrared (mid-IR) detection and imaging over atmospheric transparent 3-5 μm and 8-12 μm bands are increasingly becoming important for various space, defense and civilian applications. Various kinds of microbolometers offer uncooled detection of IR radiation. However, broadband absorption of …
-
Low-Temperature Germanium Waveguides for Mid-Infrared Sensing Applications
Waveguide integrated devices that operate in the mid-infrared (mid-IR) wavelength range (2.5-12 µm) are used for sensing the fundamental absorption bands in a variety of molecules. Germanium (Ge) is commonly used for photodetection in the nearinfrared (near-IR) wavelength range of 1.2-1.6 µm due to …
-
Leveraging Spectra to Improve the Resolution and Usability of Mid-Infrared Biomedical Microscopy: A Case Study in Bone Marrow Grading
… and pathological expertise. The current mid-IR instrumentation though practical in a research environment, it is unsuitable for many clinical applications. Limitations of spectroscopic imaging include lengthy acquisition times, unmanageable data sizes, and diffraction limited spatial …
-
Integrated narrowband guided mode resonance photonic filters for advanced mid-infrared microspectroscopy
… molecular vibrational absorption wavelengths in mid-infrared (mid-IR) have been discovered for various applications, and as a result, a faster summary of an MIR spectrum can be gained by probing a set of discrete spectral fingerprints only, enabling many applications including fast early cancer …
-
Sensitive and high-precision rovibrational spectroscopy of molecular ions relevant to astronomical and quantum chemistry
… structure. Astronomers and theorists require accurate and precise laboratory measurements of rotational and rovibrational transition frequencies, which is particularly challenging for molecular ions. This is because ions are generated in small quantities within laboratory discharges, which …
-
High harmonic generation and attosecond dynamics in small organic molecules and biomolecules
… Traditionally, describing such interactions requires the solution of the time-dependent Schr\"{o}dinger equation, but this approach is only feasible for the smallest molecular systems. An alternative approach is to use time-dependent density functional theory (TDDFT). In this thesis we report on …
-
Two-photon absorption in bulk semiconductors and quantum well structures and its applications
… applications of two-photon absorption (2PA), in direct-gap semiconductors and quantum-well (QW) semiconductor structures. One application uses extremely nondegenerate (END) 2PA, for mid-infrared (mid-IR) detection in uncooled semiconductors. The use of END, where the two photons have very …
-
Development of microcantilever mid-infrared detectors and sources and their application in infrared spectroscopy
Mid-infrared (mid-IR) light is an electromagnetic radiation with the wavelengths of 3 – 30 um. This spectral range includes the dominant wavelengths of the thermal radiation emitted by objects at or near room temperature, and vibrational and rotational resonance frequencies of many molecules. The …
-
Nonlinear Applications using Silicon Nanophotonic Wires
… applications using silicon nanophotonic "wires" fabricated on a silicon-on-insulator photonic chip. These deeply scaled silicon nanophotonic wires are capable of confining the telecom and mid-infrared (mid-IR) light tightly into an optical-modal area ~ 0.1 𝜇m². The tight optical confinement …
-
Mid infrared spectroscopic imaging and tomography
Fourier Transform Infrared (FT-IR) Spectroscopic Imaging is an optical technique that simultaneously provides morphological (two dimensional) and mid-infrared spectral (one dimensional) information for a specimen under observation. In this dissertation, we develop a new instrument that extends the …
-
Predictive simulation and design of III-V heterostructures for light emission and detection
… technologies. In this Thesis we employ both first-principles and continuum empirical - based respectively on density functional theory (DFT) and the k·p method – calculations to analyse and optimise III-V semiconductor heterostructures for light emission and detection. III-V superlattices …