Pb-salt waveguides with a metal-clad layer are discussed. It is shown that for TE modes one can assume that Ey = 0 at the metal–semiconductor boundary, while for TM modes the complex formalism should be used. It is also shown that lasers with a metal-clad waveguide should have only a small increase in their threshold current while operating in a TE mode and that they should operate in a TE mode since their TM modes generally have high threshold current.
© 1988 Optical Society of America
Original Manuscript: November 24, 1987
Manuscript Accepted: February 19, 1988
Published: May 1, 1988
Yosi Shani and Abraham Katzir, "Metal-clad waveguides for Pb-salt diode lasers," Opt. Lett. 13, 372-374 (1988)