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GaN-based VCSELs
GaN-based VCSELs
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- Haglund, Åsa, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Hashemi, Seyed Ehsan, 1986 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bengtsson, Jörgen, 1968 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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CARLSSON, STEFAN, 1987 (författare)
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- Gustavsson, Johan, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Cosendey, Gatien (författare)
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Glauser, Marlene (författare)
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Rossbach, Georg (författare)
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Grandjean, Nicolas (författare)
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Calciati, Marco (författare)
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Goano, Michele (författare)
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visa färre...
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(creator_code:org_t)
- 2015
- 2015
- Engelska.
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Ingår i: VI Workshop on Physics and Technology of Semiconductor Lasers.
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- The Vertical-Cavity Surface-Emitting Laser (VCSEL) is an established optical source in short-distance optical communication links, computer mice and tailored infrared power heating systems. Its low power consumption, easy integration into two-dimensional arrays, and low-cost manufacturing also make this type of semiconductor laser suitable for application in areas such as high-resolution printing, bio-medical and general lighting. However, these applications require emission wavelengths in the blue-UV instead of the established infrared regime, which can be achieved by using GaN-based instead of GaAs-based materials. The development of GaN-based VCSELs have shown to be challenging, and so far only a handful research groups have demonstrated lasing from such electrically pumped devices [1-6]. The presented performance is typically orders of magnitudes lower compared to that from electrically driven GaAs-based VCSELs. Some of the challenges are to achieve efficient transverse current spreading, transverse optical mode confinement, high-reflectivity mirrors and resonator length control. This talk will summarize the different strategies to solve these issues in electrically pumped GaN-VCSELs together with state-of-the-art results. We will highlight our work on combined transverse current and optical mode confinement, where we show that many structures used for current confinement result in unintentionally optically anti-guided resonators. Such resonators can have a very high optical loss, which easily doubles the threshold gain for lasing [7]. We will also present an alternative to the use of distributed Bragg reflectors as high-reflectivity mirrors, namely a TiO2/air high contrast gratings (HCGs). Fabricated HCGs of this type show a high reflectivity (>95%) over a 25 nm wavelength span, which is in excellent agreement to the reflectivity spectrum predicted by numerical simulations assuming an ideal HCG geometry [8]. References [1] T.-C. Lu, et al., Applied Physics Letters, 92, 14, (2008).[2] Y. Higuchi, et al., Applied physics express, 1, 12, 121102, (2008).[3] G. Cosendey, et al., Applied Physics Letters, 101, 15, (2012).[4] C. Holder, et al., Applied Physics Express, 5, 092104, (2012).[5] T. Onishi, et al., IEEE J. of Quantum Electronics, 48, 9,1107–1112, (2012).[6] W.-J. Liu, et al., Applied Physics Letters, 104, 251116 (2014).[7] E. Hashemi, et al., Optics Express, vol. 22 1, p. 411-426, (2014).[8] E. Hashemi, et al., Proceedings of SPIE, (0277-786X), vol. 9372 (2015).
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- GaN VCSEL laser
Publikations- och innehållstyp
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- Av författaren/redakt...
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Haglund, Åsa, 19 ...
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Hashemi, Seyed E ...
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Bengtsson, Jörge ...
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CARLSSON, STEFAN ...
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Gustavsson, Joha ...
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Cosendey, Gatien
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visa fler...
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Glauser, Marlene
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Rossbach, Georg
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Grandjean, Nicol ...
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Calciati, Marco
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Goano, Michele
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visa färre...
- Om ämnet
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Nanoteknik
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Elektroteknik oc ...
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och Annan elektrotek ...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Den kondenserade ...
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- VI Workshop on P ...
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Chalmers tekniska högskola