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EE Student Information, Spring Quarter through Academic Year 2020-2021: FAQs and Updated EE Course List.

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Ginzton Lab

AP 483 & AMO Seminar Series presents "Quantum Acceleration of Electromagnetic Axion Searches"

Topic: 
Quantum Acceleration of Electromagnetic Axion Searches
Abstract / Description: 

The QCD axion, which solves the strong CP problem in QCD, is one of the best motivated dark-matter candidates. I will discuss efforts to develop electromagnetic searches for QCD axion dark matter with masses below 1 micro-eV, including the Dark Matter Radio Cubic Meter experiment, which will probe the QCD axion band over 1.5 orders of magnitude in axion mass. However, full coverage of the QCD axion band will not be possible without acceleration by using quantum measurement techniques, which can be used to evade the standard quantum limit by the exploitation of quantum correlations in the electromagnetic signals. While photon counting is a useful technique to evade the SQL at masses above 1 micro-eV, it is not a useful technique at lower mass ranges. I will describe Quantum Upconverters, which convert signals from DC up to ~300 MHz to the microwave frequency range. Quantum upconverters can be used to implement techniques including backaction evasion to outperform the Standard Quantum Limit at the RF frequencies probed by DM Radio. They can also be used to improve electromagnetic sensing of nuclear spins for NMR-based detection schemes (including CASPEr).

(This seminar series is sponsored by Ginzton Laboratory, SPRC, Applied Physics, Physics, and HEPL)

Date and Time: 
Monday, March 2, 2020 - 4:15pm
Venue: 
Spilker 232

AP 483 & AMO Seminar Series presents "Quantum Electron Microscopy"

Topic: 
Quantum Electron Microscopy
Abstract / Description: 

Of the wide variety of sophisticated techniques employed in optical microscopy, of special interest to physicists are schemes which use quantum correlations to increase sensitivity beyond the classical limit. Such technology would be especially applicable in transmission electron microscopy (TEM) since the image resolution of samples of critical interest (e.g. proteins, polymers, and battery materials) is limited by beam damage. However, in contrast to the fantastic diversity and modularity of light optics, electron optics are significantly constrained. I will describe our project of developing new electron optics to enable dose-efficient TEM. While quantum metrology is generally associated with an entangled probe (which has not yet been demonstrated with freespace electrons), it is also possible to perform quantum-optimal measurements with a single particle using sequential measurements [1]. In fact, it is possible to gain significant information about absorbing samples using only damage-free counterfactual measurements [2]. More typically, TEM samples are phase objects. We have shown that an approach called Multi-Pass TEM (MPTEM) can reduce damage by an order of magnitude for realistic samples [3]. The key new electron optics of the MPTEM are the switchable mirrors, which trap electrons in a cavity where the sample is re-imaged multiple times. We are currently building a 10 keV MPTEM [4] as a proof of concept. [1] Quantum Metrology, Vittorio Giovannetti, Seth Lloyd, and Lorenzo Maccone (2006). [2] Designs for a Quantum Electron Microscope, P. Kruit et al, Ultramicroscopy (2016). [3] Multi-Pass Transmission Electron Microscopy, T. Juffmann et al, Scientific Reports (2017). [4] Design for a 10 keV Multi-Pass Transmission Electron Microscope, S. A. Koppell, Ultramicroscopy (2019).

Date and Time: 
Monday, January 6, 2020 - 4:15pm
Venue: 
Spilker 232

OSA/SPIE, SPRC and Ginzton Lab present "Bringing computational reproducibility to your research collaborations"

Topic: 
Bringing computational reproducibility to your research collaborations
Abstract / Description: 

Computational analyses are playing an increasingly central role in research. However, many researchers have not received training in best practices and tools for reproducibly managing and sharing their code and data. This is a step-by-step, practical webinar on managing your research code and data for computationally reproducible collaboration. The webinar starts with some brief introductory information about computational reproducibility, but the bulk of the webinar is guided work with code and data. Participants move through best practices for organizing their files, automating their analyses, documentation, and submitting their code and data for publication.

Prerequisites: Participants should bring their own wifi-enabled laptop.

Audience: Researchers who use code in their research and wish to share it.

Workshop goals:
1. Learn best practices for file organization, documentation, automation, and dissemination.
2. Assess possible tools for managing code and data.
3. Build a collaborative workspace for your code and data on Code Ocean.

Date and Time: 
Tuesday, December 3, 2019 - 3:45pm
Venue: 
Y2E2 299

OSA/SPIE, SPRC and Ginzton Lab present "How the Intersection of Photonic Integrated Circuits, DSP, and Coherent Optics is Transforming Fiber Optic Networks"

Topic: 
How the Intersection of Photonic Integrated Circuits, DSP, and Coherent Optics is Transforming Fiber Optic Networks
Abstract / Description: 

Almost every decade there is a technological transformation of the communications network that results in a major step in scale and economic efficiency. Historically these disruptive forces include the EDFA, DWDM, Photonic Integration, First Generation of coherent technology in the optical realm and packet processing in the digital realm. It is my belief that we are on the cusp of a new revolution in optical networks fueled by the intersection of PICs, DSPs and Coherent optics. I will discuss the advancements to date and the revolution that is building.

Date and Time: 
Tuesday, November 12, 2019 - 4:15pm
Venue: 
Packard 101

OSA/SPIE, SPRC and Ginzton Lab present "Hyperscale Data Center Applications of Optoelectronics"

Topic: 
Hyperscale Data Center Applications of Optoelectronics
Abstract / Description: 

From subsea fiber cables to short-reach switch interconnects, opto-electronics is a key technology for hyperscale data center networks. As performance requirements increase, photonics moves deeper into the network replacing copper for shorter distances. The next move for photonics is to distances of less than 3m for in-rack applications. This talk will describe how the scale of data-bandwidth growth has challenged what is possible with traditional networks and where the next opportunities for innovation lie.

Date and Time: 
Wednesday, October 23, 2019 - 4:15pm
Venue: 
Spilker 232

AP483 & AMO Seminar presents "Non-Equilibrium Dynamics and Townes Solitons Formation in Two-Dimensional Bose Gases"

Topic: 
Non-Equilibrium Dynamics and Townes Solitons Formation in Two-Dimensional Bose Gases
Abstract / Description: 

AP 483 Optics and Electronics Seminar

Prof. Olav Solgaard, Organizer Fall 2019

 

AMO Seminar Sub-Series first Monday of each month)

Monica Schleier-Smith, Organizer Fall 2019

 

Date and Time: 
Monday, December 2, 2019 - 4:00pm
Venue: 
Spilker 232

AP483 & AMO Seminar presents "Accelerated Scaling to Rapid Open-Air Fabrication of Durable Perovskite Solar Modules"

Topic: 
Accelerated Scaling to Rapid Open-Air Fabrication of Durable Perovskite Solar Modules
Abstract / Description: 

Organic-inorganic metal halide perovskites have seen a resurgence in interest due to unprecedented gains in power conversion efficiency (PCE). Perovskite solar cells, however, suffer from several stability challenges including thermomechanical reliability and moisture sensitivity, which are not competitive with the stability of c-Si modules that exhibit 25-service lifetimes.

We first review results from extensive studies involving an international collaboration on the inherent thermomechanical challenges for reliability of a wide range of planar and mesoporous perovskite solar cells including the role of perovskite and charge transport layer compositions. Trade-offs between efficiency and reliability, meaning maximal conversion efficiencies often come at the expense of mechanical reliability and long-term stability, are discussed.

We next consider accelerated scaling strategies to rapid open-air fabrication of durable perovskite solar modules with improved inherent perovskite and charge transport layer performance and thermal stability. We consider strategies to improve charge transport layers with a concomitant increase in device efficiency. Importantly, we demonstrate that mechanically robust perovskite films can be cured with an open-air atmospheric plasma discharge on large-scale substrates, and at linear deposition rates exceeding 4 cm/s with improved power conversion efficiency and open-circuit voltages.

Finally, we conclude by reporting on a new concept in solar cell design, the scaffold-reinforced compound solar cell (CSC) with integrated low cost optics which addresses the intrinsic fragility of these materials with mechanically reinforcing internal scaffolds. These developments mitigate the foremost barriers to wide-scale commercial deployment, namely perovskite module manufacturing and reliability, providing momentum towards the goal of 0.02 $/kWhr that exceeds even the most aggressive predictions for new silicon PV production and a pathway to tandems.


 

AP 483 Optics and Electronics Seminar

Prof. Olav Solgaard, Organizer Fall 2019

 

AMO Seminar Sub-Series first Monday of each month)

Monica Schleier-Smith, Organizer Fall 2019

 

Date and Time: 
Monday, November 11, 2019 - 4:00pm
Venue: 
Spilker 232

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