The best text I can recommend at that level (and it's a very good one) is "Optical Properties of Solids" by Mark Fox, 2nd edition: http://www.amazon.co.uk/Optical-Properties-Solids-Oxford-Physics/dp/0199573379/ref=sr_1_1?ie=UTF8&qid=1460832958&sr=8-1&keywords=optical+properties+of+solids