High power GaSb-based photonic crystal surface emitting lasers.
Abstract
Photonic crystal semiconductor lasers (PCSEL) can operate as a large area single mode surface emitters generating low divergence high power beams. The high power high brightness surface emitters operating in mid-infrared region of spectra are in demand for various applications including infrared countermeasures, eye safe lidars, free space optical communications, etc. Extension of the PCSEL functionality into the technologically important region of spectra near and above 3 µm requires development of the monolithic photonic crystal fabrication technology compatible with mid-infrared laser heterostructures based on antimonide and other material systems. New class of photonic crystal GaSb-based type-I quantum well cascade diode lasers emitting near and above 3 µm is proposed. The devices will operate in continuous wave (CW) regime at room temperature and will emit watt class output power levels in low-divergent (tens of milliradian) beams. The novel highly efficient laser heterostructures utilizing cascade pumped type-I quantum wells (QW) with reinforced carrier and optical confinements will be used for the demonstration of the high-power single mode surface emitter operation near 3 µm. The proposed PCSEL device architecture can be combined with the active regions emitting at any wavelength accessible by antimonide-based semiconductor laser technology, i.e. from below 2 to over 5 µm. The air-hole retained epitaxial regrowth of nano-patterned GaSb epitaxial surfaces will be developed for integration of the high index contrast photonic crystals with high power mid-infrared laser heterostructures. We intend to achieve control over the shapes of buried air-holes to enable photonic band engineering. The target will be the large area single mode PCSEL operation with the maximized power in low divergence beam.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 14, 2019
- Source ID
- W911NF1810057
Entities
People
- L. Shterengas
Organizations
- Army Contracting Command
- Research Foundation for the State University of New York
- United States Army