Guided-Wave Superconducting Quantum Optoelectronic Devices
Bibliographic record
Abstract
This thesis investigates a novel optoelectronic platform based on \nthe integration of superconductive structures, such as thin films \nand micro-constrictions, with optical waveguides for ultra-fast and \nultra-sensitive devices with applications including high-speed \noptical communications, quantum optical information processing, and \nterahertz (THz) devices and systems. \n \nThe kinetic-inductive photoresponse of superconducting thin films \nwill be studied as the basic optoelectronic process underlying the \noperation of these novel devices. Analytical formulation for the \nnon-bolometric response is presented, and experimental \nphotodetection in YBCO meander-line structures will be demonstrated. \n \nA set of superconducting coplanar waveguides (CPW) are designed and \ncharacterized, which support the operation of the devices at \nmicrowave frequencies. Microwave-photonic devices comprising a \nmicrowave transmission line and a light-sensitive element, such as a \nmeander-line structure, are designed and measured for implementation \nof optically tunable microwave components. \n \nIn order to support low-loss and low-dispersion propagation of \nmillimeter-wave and THz signals in ultra-fast and wideband \nkinetic-inductive devices, surface-wave transmission lines are \nproposed, incorporating long-wavelength Surface Plasmon Polariton \n(SPP) modes in planar metal-dielectric waveguides. \n \nThe theory of superconducting optical waveguides, including \nanalytical formulation and numerical methods, is developed in \ndetail. The implementation of superconducting optical waveguides is \ndiscussed thoroughly, employing conventional dielectric-waveguide \ntechniques as well as optical SPP modes. \n \nSuperconductive traveling-wave photodetectors (STWPDs) are \nintroduced as a viable means for ultra-fast and ultra-sensitive \nphotodetection and photomixing. A modified transmission line \nformalism is developed to model STWPDs, where light is guided \nthrough an optical waveguide and photodetection is distributed along \na transmission line. \n \nAs an appendix, a systematic approach is developed for the analysis \nof carrier transport through superconducting heterostructures and \nmicro-constrictions within the Bogoliubov-de Gennes (BdG) framework. \nThe method is applied to study the role of Andreev reflection and \nJosephson-like phenomena in the current-voltage characteristics of \ninhomogeneous superconducting structures. I-V characteristics are \nexperimentally demonstrated in YBCO micro-constrictions with \npotential applications in millimeter-wave and THz devices.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".