ISSN:0031-9228    

DOI:10.1063/1.2807861

出版商:AIP    

年代:1995

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2807862

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

A picture is worth a thousand—no, hundreds of thousands—of bits of information. If that picture can be optically stored and retrieved, with the data bits moving in and out in parallel, one has a very fast way to transfer information. So goes one of the motivations for research on optical holography: One can record data as a pattern of 0's and 1's on a page and rapidly store an image of that page.

ISSN:0031-9228    

DOI:10.1063/1.2807863

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

It may look like a Volkswagen Beetle on a hill, but the surprising observation1 shown here—specifically the uppermost set of white contours—has solar physicists cruising toward one of their primary goals: unraveling the mysteries of solar flares. This image of a flare was made by a team of Japanese researchers using the Yohkoh satellite (seePHYSICS TODAY, May 1992, page 19), and the emission represented by those contours is closely related to the origin of the flare's energy.

ISSN:0031-9228    

DOI:10.1063/1.2807864

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

On 9 November a group of researchers led by Peter Annbruster and Sigurd Hofmann at the Gesell‐schaft fu¨r Schwerionenforschung (GSI) in Darmstadt, Germany, observed a sequence of four alpha particles emitted from selected reaction products of a thin piece208Pbunder bombardment from a beam of 311‐MeV62Niions. The alphas clearly represented a decay chain, being essentially coincident in position and following one another at intervals ranging from a few hundred microseconds to a few hundred milliseconds. Indeed, the last three alphas had energies and delay times that clearly matched the decay chain

ISSN:0031-9228    

DOI:10.1063/1.2807865

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

A relatively large and well‐funded group of investigators did intense research on the electrical properties of silicon and germanium during World War II. Their work completely transformed attitudes toward the physical properties of the pure crystalline forms of the semiconductors: No longer regarded merely as exotic materials, these elements became components of flexibly useful circuit elements that could be manipulated to show various properties by the addition of small amounts of other elements. In this sense, the wartime research laid the groundwork for the invention of the transistor shortly after the war and ultimately the development of the integrated circuit. The work opened up a now age of electronics.

ISSN:0031-9228    

DOI:10.1063/1.881449

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

When I arrived at the General Electric Research Laboratory at the beginning of 1955, fresh from a PhD at Cornell, I was greeted by my supervisor, Leroy Apker, who looked after the semiconductor section of the general physics department. I asked him to suggest some research topics that might be germane to the interests of the section. He said that what I did was entirely up to me. After recovering from my surprise, I asked, “Well, how are you going to judge my performance at the end of the year?” He replied, “Oh, I'll just call up the people at Bell and ask them how they think you are doing.” Viewed from today's environment, what is particularly hard to understand about this conversation is how an industrial laboratory, responsible to the operating units of the company and to the stockholders, could afford to take such a relaxed view.

ISSN:0031-9228    

DOI:10.1063/1.881450

出版商:AIP    

年代:1995

数据来源: AIP

摘要:

When the laser made its debut in 1960, it was often called a solution looking for a problem. Today the laser is hailed as one of the most significant inventions of the 20th century. Lasers are used in almost all fields of science and technology, and they have become commonplace in daily life, from supermarket scanners to CD players. The recent development of ultrahigh‐power lasers has opened exciting research opportunities in the field of laser‐matter interactions. They range from the interaction of laser light with single atoms to collective effects in plasmas.

ISSN:0031-9228    

DOI:10.1063/1.881451

出版商:AIP    

年代:1995

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2807866

出版商:AIP    

年代:1995

数据来源: AIP

ISSN:0031-9228    

DOI:10.1063/1.2807867

出版商:AIP    

年代:1995

数据来源: AIP