Cl. Chua et al., INDIUM TIN OXIDE TRANSPARENT ELECTRODES FOR BROAD-AREA TOP-EMITTING VERTICAL-CAVITY LASERS FABRICATED USING A SINGLE LITHOGRAPHY STEP, IEEE photonics technology letters, 9(5), 1997, pp. 551-553
We report for the first time top emitting buried oxide vertical cavity
lasers using transparent indium tin oxide electrodes, Our process ena
bles broad-area VCSEL's to be fabricated in a single lithography step,
thus allowing the fast turn-around time necessary for evaluating VCSE
L epitaxial materials. The ITO contacts attain a peak transmission of
96%, a specific contact resistance of 10(-5) Omega . cm(2), and a shee
t resistivity of 2.5x10(-4) Omega . cm. Under room temperature CW pump
ing, the devices exhibit a minimum threshold current density of 1.2 kA
/cm(2) at a wavelength of 801 nm, and have a maximum light output powe
r of 5.2 mW.