Near-infrared semiconductor photonic switches for quantum sensors
Publication Date
August 2, 2022
Creator
Abstract
The promising performance of atom interferometry in determining precise values of fundamental constants, lends itself to applications in many areas of modern physics and engineering. In particular, the cold-atom gravimeter has proven itself to be a useful tool in determining the local acceleration due to gravity with a precision of delta g/g = 10^-9, with long term stability and accuracy. In recent years, there has been a major incentive to develop these mainly laboratory-based experimental systems towards more compact, portable and eventually commercialised systems. Part of this development involves the design, fabrication and testing of bespoke underpinning technologies such as high performance, low power integrated active optical components which would help to reduce the size, weight and power of these sensors.
In this thesis, the design, fabrication and testing of a novel integrated optical switch on semi-insulating gallium arsenide substrates is detailed. A standard double heterostructure with highly doped capping layers for ohmic metal contacts is grown on these substrates to form a PIN diode structure, consisting of a core of high refractive index and cladding layers of lower refractive index. The refractive index of each layer is selected by growing AlxGa(1-x)As (0
Item Type
ethesis
Thesis Type
PhD
Supervisors
Subjects (LC)
Associated Schools / Departments
School of Physics and Astronomy
eprints ID
68942
UoN Repository URI
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PhD_Final_Thesis_BSM_CorrectedV2-compressed.pdf
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Full-text
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Examined
Size
19.74 MB
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Adobe PDF
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