Retired Physicist, Fellow of Los Alamos National Laboratory and The American Physical Society. Preceded in death by his parents Michael and Paula Arko and brother Anthony. Husband of Kristina; Father of Alenka (Peter) Han, Michael (Claudia) Arko and Maria (Matija) Klemenc; Grandfather of Nicholas and Sienna Arko and Alex and Michael Han; Brother of Mihaela Simrayh, Joseph Arko and Janez Arko. Visitation Tuesday 4-7 PM with Rosary at 7 PM, Horan & McConaty, 1091 S. Colorado Blvd., Funeral Mass, Wednesday, 10 AM, Blessed Sacrament Catholic church, 4900 Montview Blvd., Interment Fairmount Cemetery.