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The Astronomers
Videos 1-6 of 6
 
01:00

Strong Photon-Photon Interactions and Meta-Materials

ABSTRACT Fun with Light: Strong Photon-Photon Interactions and Meta-Materials Presented by Jung-Tsung Shen The lightsaber is a supercool gadget that all of us would like to get one. It exhibits many novel light phenomena, notably the light blades of two lightsabers could interact with each other. Unfortunately it takes an enormous amount of energy to achieve that. One of the main difficulties of making a lightsaber is that photons normally do not interact with each other. In the first part of the talk, I will describe how to make photons interact with each other, which enables the capability of using photons to control photons. This capability has many potential applications in quantum communication and information processing, and other novel optoelectronics devices. Moreover, the configuration is well-suited for on-chip all solid-state implementations. In the second part of the talk, I will briefly explain what metamaterials are, and some novel optical tricks they can play, such as Harry Potter's invisibility cloak and super lens. In particular, I will discuss the mechanisms and properties of a special class of metamaterials -- metamaterials with ultra-high refractive index. Such artificial structures will be useful in many applications such as subwavelength lithography and imaging, broadband slow-light, and sensitive interferometer. (* The talk is for general audience with no background in these fields. *) Dr. Jung-Tsung Shen is currently a research associate at Stanford University, working on photon transport in nano-photonics, metamaterials, plasmonics, and thermal and energy transport in nano-structures. He obtained his PhD degree in physics in 2003 from MIT. He was also a graduate scholar at Bell Labs from year 1998 -2001. He will be an assistant professor at Washington University in St. Louis in September this year.

Added: December 27, 2009, 9:14 am by starnamer

Views: 1935 | Comments: 0

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01:00

2008 Herzberg Lecture

he 2008 Herzberg Lecture took place November 4, 2008 at Carleton University. Rolf-Dieter Heuer has been designated as the next Director General of CERN, the European Organization for Nuclear Research. He has contributed to the study of electron positron interactions, the development of experimental techniques, and the construction of large detector systems. Despite great success, many key questions in particle physics and cosmology are unanswered. In particular, some 95% of the Universe consists of unknown dark matter and dark energy. Particle physics is about to enter the Terascale, providing a deeper understanding of the Universe and possibly dramatically changing our view of the world. With the start-up of the Large Hadron Collider at CERN this year, we expect revolutionary results explaining the origin of matter, unraveling the nature of dark matter and providing glimpses of extra spatial dimensions or grand unification of forces and hints on dark energy.

Added: December 27, 2009, 6:59 am by starnamer

Views: 719 | Comments: 1

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09:26

Newton's First Law of Motion

Introduction to newton's first law of motion. Inertial frames of reference.

Added: November 3, 2009, 12:26 am by deek

Views: 921 | Comments: 0

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03:47

the big bang

how Universe is

Added: November 4, 2008, 5:56 pm by cornelius

Views: 746 | Comments: 0

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06:12

Hubble Deep Field: The Most Imp. Image Ever Taken (Redux)

This is the latest incarnation of the HDF video. The narration has been edited to include research from a paper in Physical Review Letters (2004) which puts the size of the universe at 46.5 billion light years, not 78 billion as I originally stated. In the video narration, I round that value up to 47 billion light years.

Added: November 1, 2008, 3:07 am by lonewolf

Views: 2218 | Comments: 1

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01:25

Planets and stars size in scale

Planets and stars size in scale, Uranus isn't shown but it's barely bigger than Neptune. It shows: Mercury Mars Venus Earth Neptune Saturn Jupiter Sun Sirius Pollux Arcturus Rigel Betelgeuse Antares MY Cephei W Cephei

Added: November 2, 2009, 10:31 am by hostonnet

Views: 2910 | Comments: 1

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