Electrically tunable organic vertical-cavity surface-emitting laser

Publication Type:

Journal Article


Appl. Phys. Lett., AIP Publishing, Volume 105, Issue 7, p.073303 (2014)






An electrically tunable organic vertical-cavity surface-emitting laser (VCSEL) is demonstrated and characterized. A lasing wavelength tunability
of Δλ = 10 nm with 6 V actuation is shown for a red laser emission tuned
between λ = 637 nm and λ = 628 nm. Wavelength tuning of the VCSEL
structure is enabled by electrostatic deflection of a reflective flexible
membrane that is suspended over an air gap and a dielectric mirror,
forming a 3λ lasing cavity. The lasing gain medium consists of an
evaporated organic thin film coated on a reflective membrane, which is
then additively placed over a patterned substrate containing the
dielectric mirror to fabricate an array of air-gap-VCSEL structures, each
100 μm in diameter. Beyond the electrostatic actuation of these tunable
lasers, the VCSEL array geometry also has the potential to be used as
pressure sensors with an all-optical remote excitation and readout and a
pressure sensitivity of 64 Pa/nm in the demonstrated configuration.