How to add meta tag in ember.js

I have been trying to add meta tag like below.But it is not working. can anyone help me??any help would be appreciated.

import Ember from 'ember';
const { set } = Ember;
export default Ember.Route.extend({
 // inject the head data service
 headData: Ember.inject.service(),
 afterModel() {
   set(this, 'headData.title', 'Demo App');
 }
});