Nano-Optics: Coherent Nonlinear Optical Response and Control of Single Quantum Dots - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nano-Optics: Coherent Nonlinear Optical Response and Control of Single Quantum Dots write by . This book was released on 2002. Nano-Optics: Coherent Nonlinear Optical Response and Control of Single Quantum Dots available in PDF, EPUB and Kindle. Work on this program is aimed at developing and understanding nano-optical structures with the specific goal of developing and applying quantum optical methods to characterize and manipulate the quantum states of these systems. The measurements have resulted in a number of publications which demonstrate key features of new quantum mechanical structures. These features include optically induced and detected quantum entanglement of two exciton states as well as a demonstration of a classical Bell state, a Rabi oscillations corresponding to full coherent control of the state of a single quantum dot. The measurements were then extended to show optically induced and quantum entanglement in self assembled quantum dots through the detection of Raman quantum beats. Finally, we developed and demonstrated the first low temperature near field optical microscopy using coherent nonlinear optical spectroscopy techniques to directly probe the transition dipole and map out the center of mass motion of an excitonic wave function.
The Coherent Nonlinear Optical Response and Control of Single Quantum Dots
The Coherent Nonlinear Optical Response and Control of Single Quantum Dots - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Coherent Nonlinear Optical Response and Control of Single Quantum Dots write by . This book was released on 2005. The Coherent Nonlinear Optical Response and Control of Single Quantum Dots available in PDF, EPUB and Kindle. Work on this program is aimed at developing and understanding nano-optical structures with emphasis on developing quantum optical-based devices. Specific work focused on semiconductor quantum dots. The major achievements include the first demonstration of an all optically driven quantum NOT-gate based on using the exciton-Bloch vector as the qubit (Science 2003). We also demonstrated optical density matrix tomography on this system. Since the fast recombination time of quantum dot excitons may limit these systems for quantum information applications, we initiated experiments on negatively charged quantum dots (similar to ions) where for quantum information processing, the qubit would be the electron spin. The energy level structure in this system is a 3-level A-system, which is also of importance to novel coherent optical applications such as slow light and electromagnetic induced transparency. Our experiments in this system are just beginning, but we have successfully demonstrated optically induced coherence in this system, the unexpected effect of spontaneously generated spin coherence, and coherent optical control. A summary of our work leading up to this was published by invitation in Physics Today while the achievement of the quantum NOT-gate was reviewed in Photonics News.
Nano-optics
Nano-optics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nano-optics write by Nicolas H. Bonadeo. This book was released on 1999. Nano-optics available in PDF, EPUB and Kindle.
Nonlinear Optics and Coherent Optical Control of Single Electron Systems
Nonlinear Optics and Coherent Optical Control of Single Electron Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Nonlinear Optics and Coherent Optical Control of Single Electron Systems write by . This book was released on 2008. Nonlinear Optics and Coherent Optical Control of Single Electron Systems available in PDF, EPUB and Kindle. Work on this program was aimed at developing and understanding nano-optical structures with emphasis on developing quantum optical based devices. Specific work focused on semiconductor quantum dots. During this research period, a number of important discoveries were made as well as critical demonstrations of importance to future technology. The discoveries include the prediction and observation of spontaneous emission induced coherence and the unexpected control of nuclear field fluctuations through coherent electron spin trapping that reduced the nuclear fluctuations and increases the electron spin coherence time. Demonstrations include fast spin state initialization, coherent spin trapping, quantum dot tomography, and the Mollow absorption spectrum for neutral and negatively charged exciton. Future work will capitalize on this progress to demonstrate deterministic entanglement between the electron spin and a photon for quantum information transfer and entanglements between two electron in adjacent dots for quantum based logic devices, sensors and communications.
Coherent Control of Nonlinear Optical Processes in Individual Nanoparticles
Coherent Control of Nonlinear Optical Processes in Individual Nanoparticles - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Coherent Control of Nonlinear Optical Processes in Individual Nanoparticles write by Nicolò Accanto. This book was released on 2017. Coherent Control of Nonlinear Optical Processes in Individual Nanoparticles available in PDF, EPUB and Kindle. Nanophotonics aims to understand and control the interaction of light-matter at the nanometer scale. Boosted by the development of nanotechnology and nanofabrication, nanophotonics is a thriving research field, with applications in areas as diverse as optical communications, biological imaging, super-resolution microscopy and photovoltaics. For the design of specific structures and the development of new applications, it is vital to study and understand the basic ultrafast dynamical interactions of light with individual nanoparticles (NPs). The practical realization of experiments in which single nanoparticles are addressed with temporal resolution on the femtosecond scale is very demanding. The first goal of this thesis is to develop a robust and easy to operate experimental scheme, based on the combination of ultrashort phase-controlled laser pulses and high-resolution optical microscopes, which allows the desired ultrashort laser pulses to be delivered to localized nanometric volumes. Not only do we need to observe, but also to manipulate ultrafast light-matter interactions at the nanoscale by using precisely tailored laser fields, a concept that is often referred to as coherent control. The main goal of the thesis is to extend coherent control concepts, so far mainly applied to ensembles of systems, to the manipulation of ultrafast light-matter interactions in individual nanoparticles. Experimentally, this is realized by using ultrashort laser pulses, whose spectral phase can be precisely controlled, and measuring nonlinear optical responses from individual nanoparticles. The NPs investigated in this thesis can be divided into two categories: coherent and incoherent NPs. Coherent NPs present an intrinsic resonant response, in amplitude and phase, which can be resolved and controlled by the laser field. Resonant plasmonic nanoantennas constitute the main example of coherent NPs studied in the thesis. Incoherent NPs can be either non-resonant, or characterized by a very broad (much broader than the laser spectrum) resonance. Dielectric nonlinear NPs and semiconductor quantum dots (QDs) with broad absorptions are the incoherent NPs addressed here. Incoherent NPs are of crucial importance in this thesis. Based on the second harmonic generation (SHG) from incoherent dielectric NPs, a novel method to obtain full control of ultrashort pulses on a sub-diffraction-limited area is demonstrated. Successively, by using single semiconductor QDs and a novel optimization algorithm, a closed loop coherent control scheme capable of addressing single molecules and quantum emitters is realized and tested. Nonlinear interactions in plasmonic nanoantennas, depend both on the laser field and on their resonant response. Two different nonlinear responses, excited by ultrashort phase-controlled pulses, are studied: the SHG and the two-photon absorption (TPA). By studying the SHG, a precise measurement of the plasmon resonance in nanoantennasis performed, retrieving both spectral phase and amplitude. By using phase control, the possibility of using plasmonic nanoantennas for an improved imaging technique based on multicolor second harmonic labels is discussed and demonstrated. By investigating the TPA process, the presence of a coherent regime, only accessible by ultrashort pulses, is demonstrated. Finally the realization of a highly sensitive closed loop coherent control experiment on single nanoantennas is presented. The combined progress in nanotechnology and the ability discussed in this thesis to manipulate ultrafast nanoscale dynamics using light can lead the way towards new fascinating routes in the field of nanophotonics. The switching of light from one side to another of an asymmetric nanostructure, the selective investigation of different NPs at different times, the realization of super-resolution optical microscopy with femtosecond temporal resolution, are just few of the promising applications.
