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DTSTART:20231114T100000Z
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TRANSP:OPAQUE
LOCATION:ICFO Auditorium
SUMMARY:ICFO | DANIEL URREGO
CLASS:PUBLIC
DESCRIPTION:This Ph.D. thesis presents research in imaging and optical sens
 ing\, exploring novel concepts\, and diverse applications. The experimenta
 l schemes put forward here are based on simulating specific aspects of qua
 ntum concepts using classical Optics. The last scheme takes the opposite d
 irection. Employing quantum techniques\, it develops the quantum version o
 f a Differential Interference Contrast (DIC) microscope. The thesis is div
 ided into several chapters\, each addressing distinct aspects of an experi
 mental scheme and its potential applications.\nThe first scheme introduces
  a proof-of-concept demonstration of an optical gate that uses light beam 
 with orbital angular momentum. Inspired by the quantum fingerprinting prot
 ocol\, this gate enables the efficient comparison of data strings and wave
 forms without the need for signal disclosure. The gate is tested comparing
  string of bits\, strings of quarts and different waveforms.\nThe second s
 cheme presents a protocol to assess the presence of a particular spatial s
 hape (or waveform) in a database\, by evaluating the degree of similarity 
 between the unknown spatial shape with all the elements contained in the d
 atabase. The protocol is tested by comparing the shape of a trimmed disk i
 n a database. The protocol is extended to the temporal domain\, where the 
 shapes are encoded in the amplitude of the electric fields.\nThe third sch
 eme is a novel approach to do Optical Coherence Tomography (OCT) with a fu
 lly non-mechanical scan. By leveraging the principles of spectral domain O
 CT and integrating a spatial light modulator (SLM) into the setup\, non-me
 chanical steering of the illumination optical beam is achieved. This innov
 ation eliminates the necessity of transverse scans using mechanical platfo
 rms potentially boosting the enhancement of the size\, weight\, and power 
 (SWaP) of future commercial products.\nThe last scheme is a quantum versio
 n of the Differential Interference Contrast (DIC) microscope\, harnessing 
 the remarkable Hong-Ou-Mandel (HOM) effect to retrieve phase gradients ind
 uced by varying optical thickness. In this case\, the knowledge of quantum
  optics is applied to a microscope technique.\nThe work presented in this 
 thesis contributes to the idea of using protocols from the quantum world t
 hat could be mimicked in classical applications.\nTuesday November 14\, 11
 :00 h. ICFO Auditorium\nThesis Director: Prof Dr. Juan Perez Torres
DTSTAMP:20260405T123120Z
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