AMPLIFICATION AND DISPERSION OF OPTICAL PHONONS IN POLAR SEMICONDUCTORS

AMPLIFICATION AND DISPERSION OF OPTICAL PHONONS IN POLAR SEMICONDUCTORS

The interaction between conduction electrons and optical phonons is studied. It is shown that as soon as the electron drift velocity exceeds the phase velocity of the phonons an instability occurs which appears to be strong enough to overcome damping effects. The dielectric constant of the electrons...

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1. Verfasser: WEISSGLAS,P
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CHARGE CARRIERS
ELECTRONS
OPTICS
PHONONS
Solid State Physics
TRANSPORT PROPERTIES
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description The interaction between conduction electrons and optical phonons is studied. It is shown that as soon as the electron drift velocity exceeds the phase velocity of the phonons an instability occurs which appears to be strong enough to overcome damping effects. The dielectric constant of the electrons is a function of wave number and due to this effect the group velocity of the optical phonons is greatly increased. One would therefore expect an increased thermal conductivity due to optical phonons in polar semiconductors with a high density of conduction electrons. (Author)
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It is shown that as soon as the electron drift velocity exceeds the phase velocity of the phonons an instability occurs which appears to be strong enough to overcome damping effects. The dielectric constant of the electrons is a function of wave number and due to this effect the group velocity of the optical phonons is greatly increased. One would therefore expect an increased thermal conductivity due to optical phonons in polar semiconductors with a high density of conduction electrons. (Author)</description><language>eng</language><subject>CHARGE CARRIERS ; ELECTRONS ; OPTICS ; PHONONS ; Solid State Physics ; TRANSPORT PROPERTIES</subject><creationdate>1965</creationdate><rights>APPROVED FOR PUBLIC RELEASE</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,776,881,27544,27545</link.rule.ids><linktorsrc>$$Uhttps://apps.dtic.mil/sti/citations/AD0637865$$EView_record_in_DTIC$$FView_record_in_$$GDTIC$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>WEISSGLAS,P</creatorcontrib><creatorcontrib>ROYAL INST OF TECH STOCKHOLM (SWEDEN) MICROWAVE DEPT</creatorcontrib><title>AMPLIFICATION AND DISPERSION OF OPTICAL PHONONS IN POLAR SEMICONDUCTORS</title><description>The interaction between conduction electrons and optical phonons is studied. It is shown that as soon as the electron drift velocity exceeds the phase velocity of the phonons an instability occurs which appears to be strong enough to overcome damping effects. The dielectric constant of the electrons is a function of wave number and due to this effect the group velocity of the optical phonons is greatly increased. One would therefore expect an increased thermal conductivity due to optical phonons in polar semiconductors with a high density of conduction electrons. (Author)</description><subject>CHARGE CARRIERS</subject><subject>ELECTRONS</subject><subject>OPTICS</subject><subject>PHONONS</subject><subject>Solid State Physics</subject><subject>TRANSPORT PROPERTIES</subject><fulltext>true</fulltext><rsrctype>report</rsrctype><creationdate>1965</creationdate><recordtype>report</recordtype><sourceid>1RU</sourceid><recordid>eNrjZHB39A3w8XTzdHYM8fT3U3D0c1Fw8QwOcA0KBnH93RT8A0KAkj4KAR7-fv5-wQqefgoB_j6OQQrBrr6ezv5-LqHOIf5BwTwMrGmJOcWpvFCam0HGzTXE2UM3pSQzOb64JDMvtSTe0cXAzNjcwszUmIA0ADV6Ke4</recordid><startdate>19650815</startdate><enddate>19650815</enddate><creator>WEISSGLAS,P</creator><scope>1RU</scope><scope>BHM</scope></search><sort><creationdate>19650815</creationdate><title>AMPLIFICATION AND DISPERSION OF OPTICAL PHONONS IN POLAR SEMICONDUCTORS</title><author>WEISSGLAS,P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-dtic_stinet_AD06378653</frbrgroupid><rsrctype>reports</rsrctype><prefilter>reports</prefilter><language>eng</language><creationdate>1965</creationdate><topic>CHARGE CARRIERS</topic><topic>ELECTRONS</topic><topic>OPTICS</topic><topic>PHONONS</topic><topic>Solid State Physics</topic><topic>TRANSPORT PROPERTIES</topic><toplevel>online_resources</toplevel><creatorcontrib>WEISSGLAS,P</creatorcontrib><creatorcontrib>ROYAL INST OF TECH STOCKHOLM (SWEDEN) MICROWAVE DEPT</creatorcontrib><collection>DTIC Technical Reports</collection><collection>DTIC STINET</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>WEISSGLAS,P</au><aucorp>ROYAL INST OF TECH STOCKHOLM (SWEDEN) MICROWAVE DEPT</aucorp><format>book</format><genre>unknown</genre><ristype>RPRT</ristype><btitle>AMPLIFICATION AND DISPERSION OF OPTICAL PHONONS IN POLAR SEMICONDUCTORS</btitle><date>1965-08-15</date><risdate>1965</risdate><abstract>The interaction between conduction electrons and optical phonons is studied. It is shown that as soon as the electron drift velocity exceeds the phase velocity of the phonons an instability occurs which appears to be strong enough to overcome damping effects. The dielectric constant of the electrons is a function of wave number and due to this effect the group velocity of the optical phonons is greatly increased. One would therefore expect an increased thermal conductivity due to optical phonons in polar semiconductors with a high density of conduction electrons. (Author)</abstract><oa>free_for_read</oa></addata></record>
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subjects CHARGE CARRIERS
ELECTRONS
OPTICS
PHONONS
Solid State Physics
TRANSPORT PROPERTIES
title AMPLIFICATION AND DISPERSION OF OPTICAL PHONONS IN POLAR SEMICONDUCTORS
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