Y.H. Lee

Continuous room-temperature operation of optically pumped two-dimensional photonic crystal lasers at 1.6 /spl mu/m

In this letter continuous operation is realized from two-dimensional slab photonic crystal lasers at room temperature. The laser structure is prepared by wafer fusion of an InGaAsP MQW active layer with an AlAs layer that is wet oxidized into an Al/sub 2/O/sub 3/ layer subsequently. The incident threshold pump power at 0.98 /spl mu/m is 9.2 mW for a /spl sim/10-/spl mu/m-diameter hexagonal cavity lasing at 1.6 /spl mu/m.

InGaAsP microdisk lasers on Al/sub x/O/sub y/

InGaAsP microdisk lasers are fabricated on Al/sub x/O/sub y/ by wafer fusion. Room-temperature continuous-wave operation with threshold pump power of 1.13 mW has been achieved from a 2.2-/spl mu/m diameter microdisk laser. The lasing wavelength with incident pump power redshifts at a rate of 0.28 nm/mW which shows the improved thermal characteristics due to the high thermal conductivity of Al/sub x/O/sub y/ bottom layer.

Room temperature continuous operation of optically-pumped two-dimensional photonic crystal slab laser

We report the first continuous-wave (CW) operation of 2D slab photonic crystal laser at room temperature. This 2D photonic bandgap laser is built on a thin InGaAsP slab waveguide structure. 2D triangular photonic crystal mirrors are formed by drilling holes. The lattice constant is 450 nm and the radius of holes is 140 nm. To locate the active layer near an anti-node of the slab, a 100nm thick layer is added on top of the active material which consists of six compressively strained (0.6%) InGaAsP quantum wells.