Three-dimensional direct observation of Gouy phase shift in a terajet produced by a dielectric cuboid
The generation of the terajet at the terahertz (THz) frequency with the capability of subwavelength beam-compression has been attracting increasing research interest, as did the generation of the nanojet at the optical frequency. In particular, a terajet generated from a dielectric cuboid was not pr...
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| Veröffentlicht in: | Applied physics letters 2016-05, Vol.108 (19) |
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| container_title | Applied physics letters |
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| creator | Nguyen Pham, Hai Huy Hisatake, Shintaro Minin, I. V. Minin, O. V. Nagatsuma, Tadao |
| description | The generation of the terajet at the terahertz (THz) frequency with the capability of subwavelength beam-compression has been attracting increasing research interest, as did the generation of the nanojet at the optical frequency. In particular, a terajet generated from a dielectric cuboid was not previously studied experimentally in the THz region. We here experimentally demonstrate three-dimensional visualizations and characterization of a terajet generated from a dielectric cuboid with a refractive index of n = 1.46 at 125 GHz. The subwavelength compressed beam and the Gouy phase shift phenomena of the terajet are directly observed. It is also found out that a calculation model of Gouy phase shift based on focused Gaussian beam by a lens cannot explain the Gouy phase shift of compressed beam by the terajet. The intensity enhancement of about 7.4 dB and full width at half maximum of 0.6λ are obtained at the distance 0.5λ from the cuboid. |
| doi_str_mv | 10.1063/1.4949014 |
| format | Article |
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It is also found out that a calculation model of Gouy phase shift based on focused Gaussian beam by a lens cannot explain the Gouy phase shift of compressed beam by the terajet. The intensity enhancement of about 7.4 dB and full width at half maximum of 0.6λ are obtained at the distance 0.5λ from the cuboid.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.4949014</identifier><identifier>CODEN: APPLAB</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; BEAMS ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; DIELECTRIC MATERIALS ; Dielectrics ; DISTANCE ; Gaussian beams (optics) ; LENSES ; Optical frequency ; PHASE SHIFT ; REFRACTIVE INDEX ; Refractivity</subject><ispartof>Applied physics letters, 2016-05, Vol.108 (19)</ispartof><rights>Author(s)</rights><rights>2016 Author(s). 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It is also found out that a calculation model of Gouy phase shift based on focused Gaussian beam by a lens cannot explain the Gouy phase shift of compressed beam by the terajet. The intensity enhancement of about 7.4 dB and full width at half maximum of 0.6λ are obtained at the distance 0.5λ from the cuboid.</description><subject>Applied physics</subject><subject>BEAMS</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>DIELECTRIC MATERIALS</subject><subject>Dielectrics</subject><subject>DISTANCE</subject><subject>Gaussian beams (optics)</subject><subject>LENSES</subject><subject>Optical frequency</subject><subject>PHASE SHIFT</subject><subject>REFRACTIVE INDEX</subject><subject>Refractivity</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLBDEQhIMouD4O_oOAJ4XRdDKPzVFEV2HBi55DJukwWdbJmmSE_fdGV_QgeGq6-KiuLkLOgF0Ba8U1XNWylgzqPTID1nWVAJjvkxljTFStbOCQHKW0KmvDhZgRfB4iYmX9K47Jh1GvqfURTaahTxjfdS4iDY4uwrSlm0EnpGnwLlM_Uk0zRr3CTDcx2Mmgpf22qNbjulhEb6iZ-uDtCTlwep3w9Hsek5f7u-fbh2r5tHi8vVlWpuaQKy5ax1opnYU5a9E52RvUrsOOSyOkm3MuGimkrLFAkrMioazrRoPgsm_EMTnf-YaUvUrGZzSDCeNY0ijOGwmthF-qpH6bMGW1ClMsryfFgUPXCd7UhbrYUSaGlCI6tYn-VcetAqY-u1agvrsu7OWO_Tz5VdkP_B7iL6g21v0H_3X-AA3Li-c</recordid><startdate>20160509</startdate><enddate>20160509</enddate><creator>Nguyen Pham, Hai Huy</creator><creator>Hisatake, Shintaro</creator><creator>Minin, I. 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The subwavelength compressed beam and the Gouy phase shift phenomena of the terajet are directly observed. It is also found out that a calculation model of Gouy phase shift based on focused Gaussian beam by a lens cannot explain the Gouy phase shift of compressed beam by the terajet. The intensity enhancement of about 7.4 dB and full width at half maximum of 0.6λ are obtained at the distance 0.5λ from the cuboid.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4949014</doi><tpages>4</tpages><orcidid>https://orcid.org/0000-0001-8161-7624</orcidid><orcidid>https://orcid.org/0000-0002-6108-8419</orcidid></addata></record> |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Applied physics BEAMS CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DIELECTRIC MATERIALS Dielectrics DISTANCE Gaussian beams (optics) LENSES Optical frequency PHASE SHIFT REFRACTIVE INDEX Refractivity |
| title | Three-dimensional direct observation of Gouy phase shift in a terajet produced by a dielectric cuboid |
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