PbS quantum dot lasers: towards high quality tuneable emission across the short-wave infrared
PbS quantum dot lasers: towards high quality tuneable emission across the short-wave infrared
- New search for: Whitworth, Guy L.
- New search for: Dalmases, Mariona
- New search for: Taghipour, Nima
- New search for: Konstantatos, Gerasimos
- New search for: Whitworth, Guy L.
- New search for: Dalmases, Mariona
- New search for: Taghipour, Nima
- New search for: Konstantatos, Gerasimos
Lead sulfide (PbS) colloidal quantum dots (CQDs) are a novel infrared gain medium, which can exhibit tunable gain across the short-wave infrared (SWIR); lasing in this material however, remained undemonstrated until recent. Here we present a random-like laser emission from PbS CQDs at 1607 nm using a silica based distributed-feedback structure. We determined this random lasing behavior to arise via heating of the CQDs from the intense pulsed laser source, causing a drift in gain. The effects of the thermal conductivity of the substrate were then explored and were seen to be a critical factor in forming stable DFB lasing. By using an alumina based grating, DFB lasing was demonstrated between 1.55 μm – 1.65 μm with linewidths as low as ~0.9 meV.
Document information
PbS quantum dot lasers: towards high quality tuneable emission across the short-wave infrared
Semiconductor Lasers and Laser Dynamics X ; 2022 ; Strasbourg,France
Proc. SPIE ; 12141
2022-05-20
Conference paper
Electronic Resource
English
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