Waveguide design for bi-modal operation of THz quantum cascade lasers
The design and fabrication of a bi-modal semi-insulating surface-plasmon waveguide for a quantum cascade laser emitting at 3.75 THz is presented. Different transverse modes are excited under different electric current injection due to their different overlapping with the laterally nonuniform gain pr...
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| creator | Razavipour, S. Fathololoumi, S. Rafi, G. Z. Ban, D. Safavi-Naeini, S. Laframboise, S. R. Wasilewski, Z. Liu, H. |
| description | The design and fabrication of a bi-modal semi-insulating surface-plasmon waveguide for a quantum cascade laser emitting at 3.75 THz is presented. Different transverse modes are excited under different electric current injection due to their different overlapping with the laterally nonuniform gain profile in the active region. HFSS and COMSOL program are used to simulate the near/far field and loss for various waveguide structures, respectively. It is found that a 150 µm wide surface-plasmon waveguide allows either co-excitation or selective excitation of the first two transverse modes. The total optical loss (i.e., the combination of waveguide and mirror loss) is found below 20 cm-1. An electrically controllable dynamic beam pattern steering is predicted. The near and far field measurements of a fabricated quantum cascade laser device confirm the theoretical results. The dynamic switching of far-field beam pattern by an angle of 25° is observed when the current density changes. |
| doi_str_mv | 10.1109/MWSYM.2010.5514980 |
| format | Conference Proceeding |
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Z. ; Ban, D. ; Safavi-Naeini, S. ; Laframboise, S. R. ; Wasilewski, Z. ; Liu, H.</creator><creatorcontrib>Razavipour, S. ; Fathololoumi, S. ; Rafi, G. Z. ; Ban, D. ; Safavi-Naeini, S. ; Laframboise, S. R. ; Wasilewski, Z. ; Liu, H.</creatorcontrib><description>The design and fabrication of a bi-modal semi-insulating surface-plasmon waveguide for a quantum cascade laser emitting at 3.75 THz is presented. Different transverse modes are excited under different electric current injection due to their different overlapping with the laterally nonuniform gain profile in the active region. HFSS and COMSOL program are used to simulate the near/far field and loss for various waveguide structures, respectively. It is found that a 150 µm wide surface-plasmon waveguide allows either co-excitation or selective excitation of the first two transverse modes. The total optical loss (i.e., the combination of waveguide and mirror loss) is found below 20 cm-1. An electrically controllable dynamic beam pattern steering is predicted. The near and far field measurements of a fabricated quantum cascade laser device confirm the theoretical results. The dynamic switching of far-field beam pattern by an angle of 25° is observed when the current density changes.</description><identifier>ISSN: 0149-645X</identifier><identifier>ISBN: 1424460565</identifier><identifier>ISBN: 9781424460564</identifier><identifier>EISSN: 2576-7216</identifier><identifier>EISBN: 1424460581</identifier><identifier>EISBN: 1424477328</identifier><identifier>EISBN: 9781424460588</identifier><identifier>EISBN: 9781424477326</identifier><identifier>EISBN: 9781424460571</identifier><identifier>EISBN: 1424460573</identifier><identifier>DOI: 10.1109/MWSYM.2010.5514980</identifier><language>eng</language><publisher>IEEE</publisher><subject>Laser beams ; Laser excitation ; Optical design ; Optical device fabrication ; Optical losses ; Optical surface waves ; Optical waveguides ; Quantum cascade lasers ; Surface emitting lasers ; Surface waves</subject><ispartof>2010 IEEE MTT-S International Microwave Symposium, 2010, p.1-1</ispartof><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/5514980$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,780,784,789,790,2058,27925,54920</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/5514980$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Razavipour, S.</creatorcontrib><creatorcontrib>Fathololoumi, S.</creatorcontrib><creatorcontrib>Rafi, G. Z.</creatorcontrib><creatorcontrib>Ban, D.</creatorcontrib><creatorcontrib>Safavi-Naeini, S.</creatorcontrib><creatorcontrib>Laframboise, S. R.</creatorcontrib><creatorcontrib>Wasilewski, Z.</creatorcontrib><creatorcontrib>Liu, H.</creatorcontrib><title>Waveguide design for bi-modal operation of THz quantum cascade lasers</title><title>2010 IEEE MTT-S International Microwave Symposium</title><addtitle>MWSYM</addtitle><description>The design and fabrication of a bi-modal semi-insulating surface-plasmon waveguide for a quantum cascade laser emitting at 3.75 THz is presented. Different transverse modes are excited under different electric current injection due to their different overlapping with the laterally nonuniform gain profile in the active region. HFSS and COMSOL program are used to simulate the near/far field and loss for various waveguide structures, respectively. It is found that a 150 µm wide surface-plasmon waveguide allows either co-excitation or selective excitation of the first two transverse modes. The total optical loss (i.e., the combination of waveguide and mirror loss) is found below 20 cm-1. An electrically controllable dynamic beam pattern steering is predicted. The near and far field measurements of a fabricated quantum cascade laser device confirm the theoretical results. The dynamic switching of far-field beam pattern by an angle of 25° is observed when the current density changes.</description><subject>Laser beams</subject><subject>Laser excitation</subject><subject>Optical design</subject><subject>Optical device fabrication</subject><subject>Optical losses</subject><subject>Optical surface waves</subject><subject>Optical waveguides</subject><subject>Quantum cascade lasers</subject><subject>Surface emitting lasers</subject><subject>Surface waves</subject><issn>0149-645X</issn><issn>2576-7216</issn><isbn>1424460565</isbn><isbn>9781424460564</isbn><isbn>1424460581</isbn><isbn>1424477328</isbn><isbn>9781424460588</isbn><isbn>9781424477326</isbn><isbn>9781424460571</isbn><isbn>1424460573</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2010</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNpFUNtKw0AUXG9grP0Bfdkf2LqbvST7KKW1QosPBqpP5XRzUlZyqdlE0K93wYLzMgwzczgMIXeCz4Tg9mGzfX3fzFIetdZC2ZyfkRuhUqUM17k4J0mqM8OyVJiLf8PoS5LwGGdG6bdrMg3hg0conercJmSxhS88jL5EWmLwh5ZWXU_3njVdCTXtjtjD4LuWdhUtVj_0c4R2GBvqIDiIpRoC9uGWXFVQB5yeeEKK5aKYr9j65el5_rhm3vKBIeTGWLQqk5q7PTrhJIATWiI4tJXOXarQZVaDs8LK0kElLUZfOYzvygm5_zvrEXF37H0D_ffutIb8BWxoUCU</recordid><startdate>201005</startdate><enddate>201005</enddate><creator>Razavipour, S.</creator><creator>Fathololoumi, S.</creator><creator>Rafi, G. Z.</creator><creator>Ban, D.</creator><creator>Safavi-Naeini, S.</creator><creator>Laframboise, S. R.</creator><creator>Wasilewski, Z.</creator><creator>Liu, H.</creator><general>IEEE</general><scope>6IE</scope><scope>6IH</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIO</scope></search><sort><creationdate>201005</creationdate><title>Waveguide design for bi-modal operation of THz quantum cascade lasers</title><author>Razavipour, S. ; Fathololoumi, S. ; Rafi, G. Z. ; Ban, D. ; Safavi-Naeini, S. ; Laframboise, S. R. ; Wasilewski, Z. ; Liu, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i90t-ea8669e947350cbec1c3aac153eace9f58c24ec795ac9193dcaf39e1534ce2583</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Laser beams</topic><topic>Laser excitation</topic><topic>Optical design</topic><topic>Optical device fabrication</topic><topic>Optical losses</topic><topic>Optical surface waves</topic><topic>Optical waveguides</topic><topic>Quantum cascade lasers</topic><topic>Surface emitting lasers</topic><topic>Surface waves</topic><toplevel>online_resources</toplevel><creatorcontrib>Razavipour, S.</creatorcontrib><creatorcontrib>Fathololoumi, S.</creatorcontrib><creatorcontrib>Rafi, G. Z.</creatorcontrib><creatorcontrib>Ban, D.</creatorcontrib><creatorcontrib>Safavi-Naeini, S.</creatorcontrib><creatorcontrib>Laframboise, S. R.</creatorcontrib><creatorcontrib>Wasilewski, Z.</creatorcontrib><creatorcontrib>Liu, H.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan (POP) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP) 1998-present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Razavipour, S.</au><au>Fathololoumi, S.</au><au>Rafi, G. Z.</au><au>Ban, D.</au><au>Safavi-Naeini, S.</au><au>Laframboise, S. R.</au><au>Wasilewski, Z.</au><au>Liu, H.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Waveguide design for bi-modal operation of THz quantum cascade lasers</atitle><btitle>2010 IEEE MTT-S International Microwave Symposium</btitle><stitle>MWSYM</stitle><date>2010-05</date><risdate>2010</risdate><spage>1</spage><epage>1</epage><pages>1-1</pages><issn>0149-645X</issn><eissn>2576-7216</eissn><isbn>1424460565</isbn><isbn>9781424460564</isbn><eisbn>1424460581</eisbn><eisbn>1424477328</eisbn><eisbn>9781424460588</eisbn><eisbn>9781424477326</eisbn><eisbn>9781424460571</eisbn><eisbn>1424460573</eisbn><abstract>The design and fabrication of a bi-modal semi-insulating surface-plasmon waveguide for a quantum cascade laser emitting at 3.75 THz is presented. Different transverse modes are excited under different electric current injection due to their different overlapping with the laterally nonuniform gain profile in the active region. HFSS and COMSOL program are used to simulate the near/far field and loss for various waveguide structures, respectively. It is found that a 150 µm wide surface-plasmon waveguide allows either co-excitation or selective excitation of the first two transverse modes. The total optical loss (i.e., the combination of waveguide and mirror loss) is found below 20 cm-1. An electrically controllable dynamic beam pattern steering is predicted. The near and far field measurements of a fabricated quantum cascade laser device confirm the theoretical results. The dynamic switching of far-field beam pattern by an angle of 25° is observed when the current density changes.</abstract><pub>IEEE</pub><doi>10.1109/MWSYM.2010.5514980</doi><tpages>1</tpages></addata></record> |
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| identifier | ISSN: 0149-645X |
| ispartof | 2010 IEEE MTT-S International Microwave Symposium, 2010, p.1-1 |
| issn | 0149-645X 2576-7216 |
| language | eng |
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| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Laser beams Laser excitation Optical design Optical device fabrication Optical losses Optical surface waves Optical waveguides Quantum cascade lasers Surface emitting lasers Surface waves |
| title | Waveguide design for bi-modal operation of THz quantum cascade lasers |
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