548 citations · 1.3k across the 17 of their papers we have counts for
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Low-threshold optically pumped lasing in highly strained Ge nanowires
Shuyu Bao, Daeik Kim, Chibuzo Onwukaeme +11
The integration of efficient, miniaturized group IV lasers into CMOS architecture holds the key to the realization of fully functional photonic-integrated circuits. Despite several…
Ge Microdisk with Lithographically-Tunable Strain using CMOS-Compatible Process
David S. Sukhdeo, Jan Petykiewicz, Shashank Gupta +6
We present germanium microdisk optical resonators under a large biaxial tensile strain using a CMOS-compatible fabrication process. Biaxial tensile strain of ~0.7% is achieved by m…
Direct Bandgap Light Emission from Strained Ge Nanowires Coupled with High-Q Optical Cavities
Jan Petykiewicz, Donguk Nam, David S. Sukhdeo +5
A silicon-compatible light source is the final missing piece for completing high-speed, low-power on-chip optical interconnects. In this paper, we present a germanium-based light e…
Ultimate Limit of Biaxial Tensile Strain and N-Type Doping for Realizing an Efficient Low-Threshold Ge Laser
David S. Sukhdeo, Shashank Gupta, Krishna C. Saraswat +3
We theoretically investigate how the threshold of a Ge-on-Si laser can be minimized and how the slope efficiency can be maximized in presence of both biaxial tensile strain and n-t…
Impact of Minority Carrier Lifetime on the Performance of Strained Ge Light Sources
David S. Sukhdeo, Krishna C. Saraswat, Birendra +2
We theoretically investigate the impact of the defect-limited carrier lifetime on the performance of germanium (Ge) light sources, specifically LEDs and lasers. For Ge LEDs, we sho…
Anomalous Threshold Reduction from <100> Uniaxial Strain for a Low-Threshold Ge Laser
David S. Sukhdeo, Shashank Gupta, Krishna C. Saraswat +2
We theoretically investigate the effect of <100> uniaxial strain on a Ge-on-Si laser using deformation potentials. We predict a sudden and dramatic ~200x threshold reduction upon a…
A Nanomembrane-Based Bandgap-Tunable Germanium Microdisk Using Lithographically-Customizable Biaxial Strain for Silicon-Compatible Optoelectronics
David S. Sukhdeo, Donguk Nam, Ju-Hyung Kang +2
Strain engineering has proven to be vital for germanium-based photonics, in particular light emission. However, applying a large permanent biaxial strain to germanium has been a ch…
Electroluminescence from Strained Ge membranes and Implications for an Efficient Si-Compatible Laser
Donguk Nam, David Sukhdeo, Szu-Lin Cheng +5
We demonstrate room-temperature electroluminescence (EL) from light-emitting diodes (LED) on highly strained germanium (Ge) membranes. An external stressor technique was employed t…