As optoelectronic semiconductor research reaches a level of saturation, incorporation of unconventional processes and techniques often add to new phenomena and opportunities. In this manuscript, we share our perspective regarding the application of electrochemistry to GaN and related compound semiconductors. Two specific examples of using nanoporous structures, created by electrochemistry, for mini-/micro- LEDs and for vertical cavity surface emitting lasers (VCSELs) are discussed.
Due to their unique properties, III-nitride vertical -cavity surface-emitting lasers (VCSELs) are expected to enable several applications ranging across communication, sensing and ranging and spectroscopy. Their technological feasibility however has been hindered by the lack of an electrically conductive, easily manufacturable, wide reflection stopband distributed Bragg reflector (DBR) to serve as the bottom reflector. Here we present the first electrically injected III-nitride VCSEL on an electrically conductive DBR using nanoporous (NP) GaN operating at roomtemperature. The measured threshold current density and the maximum light output power were 42 kA/cm2 and 0.17 mW, respectively, at 434 nm. Due to the electrical conductivity of the bottom NP GaN DBR, vertical injection was demonstrated and compared with intracavity injection. No change in the threshold current density, the slope efficiency or nearfield pattern was observed demonstrating the feasibility of efficient vertical injection in NP GaN VCSELs. Filamentary lasing was observed within the VCSEL aperture and its correlation with the lasing linewidth was studied.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.