Vertical cavity laser

Il-Sug Chung (Inventor), Alireza Taghizadeh (Inventor)

Research output: Patent

176 Downloads (Pure)

Abstract

The present invention provides a vertical cavity laser comprising a grating layer comprising an in-plane grating, the grating layer having a first side and having a second side opposite the first side and comprising a contiguous core grating region having a grating structure, wherein an index of refraction of high-index sections of the grating structure is at least 2.5, and wherein an index of refraction of low-index sections of the grating structure is less than 2, the core grating region defining a projection in a direction normal to the grating layer; a cap layer having a first side and having a second side opposite the first side, the first side of the cap layer abutting the second side of the grating layer, and an index of refraction of the cap layer within the projection of the core grating region onto the cap layer is at least 2.5, and within the projection of the core grating region, the second side of the cap layer is abutted by a first low-index layer and/or by air, an index of refraction of the first low-index layer or air being less than 2, and within the projection of the core grating region, the first side of the grating layer is abutted by a second low-index layer and/or by air, an index of refraction of the second low-index layer or air being less than 2; and a thickness of the cap layer and a thickness of the grating layer, and a pitch and a duty cycle of the grating structure are selected to obtain a resonance having a free-space resonance wavelength in the interval 300 nm to 3 microns, the cap layer comprises an active region configured to generate or absorb photons at the free-space resonance wavelength by stimulated emission or absorption when a sufficient forward or reverse bias voltage is applied across the active region, a thickness of the first low-index layer is less than 45 % or more than 55 % of the free-space resonance wavelength divided by a highest index of refraction of the first low-index layer within the core grating region, and a thickness of the cap layer is less than 5 microns.

Original languageEnglish
IPCH01S 5/ 20 A I
Patent numberWO2016184471
Filing date24/11/2016
CountryInternational Bureau of the World Intellectual Property Organization (WIPO)
Priority date15/05/2015
Priority numberEP20150167846
Publication statusPublished - 24 Nov 2016

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