EE Student Information

Optics and Electronics Seminar

AP 483 Seminar: An energy eco-systems perspective towards achieving 50% CO2 reduction in ten years

An energy eco-systems perspective towards achieving 50% CO2 reduction in ten years
Abstract / Description: 

As many countries are committed to reducing CO2 by 50% in approximately ten years, the question we raise is: What is the optimal strategy to achieve this goal, while minimizing cost? Cost is defined here as investment required to achieve the goal while providing users sustainable energy at the lowest price. The approach we advocate is to start with the current LLNL Energy Flow Diagrams for 2021, and ask all major players in the energy ecosystem to provide their approach to achieve the above defined objective. This idea is implemented in a three day meeting at Caltech, called EC-10 in the middle of this year. The output of the meeting will be a number of potential scenarios that are further processed after the meeting to find an optimal strategy. As a by-product key technology, regulatory, and other obstacles and potential solutions/opportunities will be identified. In a follow-up effort a detailed strategic plan will be developed with key eco-system participants in the fall of 2022.

Date and Time: 
Monday, January 24, 2022 - 4:15pm

AP483 Seminar: A perspective on petahertz (nano)electronics

A perspective on petahertz (nano)electronics
Abstract / Description: 

Ultrafast electronic dynamics of solid-state materials, particularly under light excitation, are of great interests both fundamentally and practically due to the wide applications of optoelectronic devices, such as transistors, photovoltaics, or photodetectors. With the ability to control electronic dynamics in solids on attosecond time scales, the development of lightwave electronics holds promise for realizing ultrafast signal processing devices at frequencies up to the petahertz regime, surpassing current technology by orders of magnitude. The development of light-driven petahertz electronics is inherently connected to solid state nanophysics. First, the natural length scale of electron motion on the few attosecond time scale is on the order of one nanometer. Second, for the development of petahertz integrated circuits, the devices have to be both on nanometer length scales and be based on non-resistive processes, such as ballistic electron transport. Nanomaterials or nanostructured solids thus play a crucial role in the development of future on-chip petahertz electronics devices. As the other side of the coin, field-resolved spectroscopy relying on similar optical tools, is a powerful technique for addressing the sub-cycle response of a solid to a light field. Opening up field-resolved spectroscopy to the THz and PHz frequency ranges will enable sensitivity to a manifold of vibrational and electronic transitions in organic electronics and 2D-materials. The talk will give a broader introduction into this field and summarize a few recent results from our group. A perspective will be given on the next steps towards the implementation of petahertz signal processing.

Date and Time: 
Monday, January 31, 2022 - 4:15pm
Spilker 232 + Zoom


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