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Sökning: WFRF:(Pramudita Putu)

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1.
  • Kim, Hwi-Min, et al. (författare)
  • Monolithic integration of self-aligned nanoisland laser with shifted-air-hole waveguide
  • 2018
  • Ingår i: Optics Express. - : OPTICAL SOC AMER. - 1094-4087. ; 26:10, s. 12569-12578
  • Tidskriftsartikel (refereegranskat)abstract
    • We report a novel scheme for monolithic integration of a nanoisland laser with a shifted-air-hole waveguide by employing selective etching techniques. An active L3 laser cavity and passive shifted-air-hole waveguide are simultaneously formed through a single fabrication step. In the shifted-air-hole waveguide, the air-hole position is adjusted to be compatible with selective etching. The spectral overlap between the L3 laser resonance and guided mode is achieved by introducing small air holes at the nodes of the shifted-air-hole waveguide. Experiments show that >60% of the light is coupled from the nanoisland laser to the end of the 12-mu m-long waveguide.
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2.
  • Pramudita, Putu, et al. (författare)
  • Self-aligned nanoislands nanobeam bandedge lasers
  • 2017
  • Ingår i: Optics Express. - : Optical Society of America. - 1094-4087. ; 25:6, s. 6311-6319
  • Tidskriftsartikel (refereegranskat)abstract
    • We propose and demonstrate a novel one-dimensional nanobeam bandedge laser constituted by self-aligned nanoisland quantum-well (QW) structures. The formation of self-aligned InGaAsP nanoislands sandwiched between two InP claddings is the result of selective removal of QW through wet-etching processes. By controlling wet-etching time, we show a good spatial and spectral overlap between the dielectric mode and the self-aligned nanoisland structures leads to the realization of nanobeam bandedge lasers with low-threshold operations and high slope efficiencies. Optical characterization results indicate a strong correlation between the size of individual nanoisland and the threshold power of our nanobeam bandedge lasers. We obtain an approximately 81% reduction in the absorbed threshold power as we optimize the size of the nanoislands.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
Typ av innehåll
refereegranskat (2)
Författare/redaktör
Lee, Yong-Hee (2)
Jang, Hoon (2)
Kim, Hwi-Min (2)
Pramudita, Putu (2)
Kim, Myung-Ki (1)
Karnadi, Indra (1)
Lärosäte
Kungliga Tekniska Högskolan (2)
Språk
Engelska (2)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (2)

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