**High Resolution Laser Spectroscopy of Cesium Vapor Layers with Nanometric Thickness**

Stefka Cartaleva1, Anna Krasteva1, Armen Sargsyan2, David Sarkisyan2, Dimitar Slavov1, Petko Todorov1 and Kapka Vaseva1 *1Institute of Electronics, Bulgarian Academy of Sciences, Sofia 2Institute for Physical Research, National Academy of Sciences of Armenia, Ashtarak 1Bulgaria 2Armenia* 
