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 20 of 39 for “"Cavity-enhanced"”.
-
Dilute Nitride Based Vertical Cavity Enhanced Photodetector
… the performance of a p-i-n / vertical cavity enhanced (VCE) photodetector structure with different material compositions of dilute nitride. The tunable selectivity is taken into account during the development in order for the VCE photodetector to be able to perform as a tunable …
-
Resonant Cavity Enhanced Photodetectors and Optoelectronic Switches
… to optimize the bandwidth. The resonant cavity enhanced (RCE) detection scheme can be used in many different detector designs to improve the device sensitivity without any detrimental effects on the device speed. This thesis examines the photosensitivity characteristics of RCE detectors …
-
Few-cycle and cavity-enhanced optical parametric amplification
… resulting in a new technique entitled, cavity-enhanced optical parametric chirped-pulse amplification (C-OPCPA). C-OPCPA increases the capabilities of nonlinear crystals and can allow continued scaling of parametric amplifier systems to high repetition rate. This work contains the first …
-
Investigation of resonant cavity-enhanced photodetectors and avalanche optoelectronic switches
… crystal growth techniques. And optical resonant cavity formed by multilayer dielectric stacks is among the important applications of heterostructures in optoelectronic devices.
-
Ultrabright source of polarization-entangled photons from cavity-enhanced downconversion
… pairs by performing the down-conversion inside a cavity. The collinear downconversion geometry inside the linear cavity is achieved by using a quasi-phased-matched periodically-poled potassium titanyl phosphate (PPKTP) crystal. The single-pass free-space photon-pairs produced were demonstrated to …
-
Resonant-cavity-enhanced multispectral infrared photodetectors for monolithic integration on silicon
… of novel IR sensitive material and resonant-cavity- enhanced (RCE) photodetector devices that address the emerging need in the field of IR radiation detection. Polycrystalline PbTe films have been identified as the IR absorbing layers due to their high photosensitivity and fabrication …
-
Laser-induced plasmas in air for pulsed broadband cavity-enhanced absorption spectroscopy
… inside a high-finesse near-concentric optical cavity. The broadband optical plasma emission was successfully sustained within the cavity and the light leaking from the cavity was used to measure broadband absorption spectra of gaseous azulene through (i) time-dependent cavity ring-down (CRDS), …
-
Vector magnetometry using cavity-enhanced microwave readout of solid-state spin sensors
… via strong coupling to a dielectric microwave cavity. This strong collective interaction allows the spin ensemble’s microwave transition to be probed directly, thereby overcoming the optical photon shot noise limitations of conventional fluorescence readout. Applying this technique to …
-
High-accuracy and high-precision infrared spectroscopy of fundamental molecular ions using noise immune cavity enhanced optical heterodyne velocity modulation spectroscopy
… accomplished by combining heterodyne modulation, cavity enhancement, and velocity modulation in a spectroscopic technique called Noise-Immune Cavity-Enhanced Optical Heterodyne Velocity Modulation Spectroscopy (NICE-OHVMS). This thesis will describe efforts to conduct high-resolution and …
-
Sensitive and high-precision rovibrational spectroscopy of molecular ions relevant to astronomical and quantum chemistry
… ions. The sub-Doppler technique Noise Immune Cavity Enhanced Optical Heterodyne Velocity Modulation Spectroscopy (NICE-OHVMS) combines the sensitivity of cavity-enhanced methods with the selectivity of velocity modulation. In this work, a NICE-OHVMS instrument which suffered from parasitic …
-
Novel diode laser absorption techniques for combustion diagnostics
… the sensitivity of such techniques is by using cavity enhanced methods which increase the effective path length of the laser through the absorbing medium. One such cavity enhanced method is Cavity Ring-Down Spectroscopy (CRDS). CRDS uses a cavity constructed of highly reflecting mirrors, laser …
-
Thermophotovoltaics : shaping the flow of thermal radiation
… thermal emitters that use the resonant cavity effect. The first type of narrow-band thermal emitters rely on vertical-cavity to enhance the thermal emission of highly reflective materials (e.g metals). This class of emitters was named the vertical cavity enhanced resonant thermal emitter …
-
A System for Measuring Radiation Induced Chemical Products in Atmospheric Gases Using Optical Detection Methods
… This project explored the potential for using Cavity Ringdown Spectroscopy to evaluate the presence of chemical products generated by the air-radiation interaction near an alpha radiation source. In particular, measurements of ozone concentration within a controlled atmosphere chamber as …
-
Protocols and Devices for Scalable Spin-Photon Quantum Networks
… with heterogeneously integrated emitter-nanocavity systems for faithfully transferring photonic qubits onto diamond color centers. This hybrid platform offers arbitrary photonic routing, phase stability, and reconfigurability to achieve high-fidelity and high-efficiency local and remote …
-
Progress in sensitive mid-infrared spectroscopy of cooled molecular ions
… of concentration-modulated noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (cm-NICE-OHMS) on a continuous gas-flow pinhole supersonic expansion discharge source for the study of cooled molecular ions. The instrument, which began as a difference-frequency generation …
-
Development of a sensitive mid-infrared spectrometer for the study of cooled molecular ions
… difference frequency generation noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) system has been developed and characterized through rovibrational spectroscopy of methane. In addition, an attempt was made to use this spectrometer to probe molecular ions …
-
Spectroscopic investigations of the X and A state dynamics of ¹³C₂H₂
… Fluorescence (LIF), Dispersed Fluorescence (DF), Cavity Ring-Down Spectroscopy (CRDS), Noise Immune Cavity Enhanced Optical Heterodyne Molecular Spectroscopy (NICE-OHMS) and Stimulated Emission Pumping (SEP) are employed to study the spectroscopy and dynamics of acetylene. All of these experiments …
-
Strong-field physics with ultrafast optical resonators
… major themes in the area of ultrafast resonator-enhanced strong-field physics. First, we use plasmonic nanoparticles as nano-optical resonators to explore strong-field photoemission near nanostructures on the surface of a chip. We demonstrate strong-field photoemission with our chip-scale devices …
-
Cavity Ringdown Spectroscopy in Nitrogen/Oxygen Mixtures in the Presence of Alpha Radiation
… for radiation-induced atmospheric effects. Cavity Ringdown Spectroscopy (CRDS) was used to measure the concentration of chemical products generated as a result of radiation interactions in a controlled atmosphere. Experiments were conducted in a vacuum chamber interfaced with a gas …
-
Long-range depth profiling based on time-correlated single-photon counting
… detection modules, including a novel, resonant-cavity-enhanced single-photon avalanche diode. A new data acquisition mode for TCSPC applications was developed to facilitate performance evaluation. Depth uncertainties of 250 m were achieved with the system at 320 m stand-off distance, and a …
Page 1 of 2