You have wired modem and your laptop connected to Internet via Ethernet. Now if you want to access this internet from your SmartPhone/Tablets then you can share the internet from the Laptop.
You can simply create a Wifi hotspot quickly using the following command. I have tested this in the Windows 8. It works great
1.Open a command prompt in Run as administrator mode.
2.Enter the following command to create the Wifi Hotspot
netsh wlan set hostednetwork mode=allow ssid=<WiFi HotspotName> key=<Hotspot Password>
3.Start the Hotspot
netsh wlan start hostednetwork
4.Stop the Hospot
netsh wlan stop hostednetwork
Note : Additionally you need to enable the sharing for the current interent connectivity which your laptop has been connected.
This also works if your laptop connected to a Wifi Network and you still want to create a Wifi Hotspot.