DURING A LANDING THE FAA TOWER OPERATOR REPORTED SMOKE BEING EMITTED FROM THE LEFT MAIN LANDING GEAR. THE CAPTAIN REQUESTED AIRCRAFT RESCUE AND FIRE FIGHTING (ARFF) ASSISTANCE AND VERIFY THE POSSIBILITY OF FIRE. THE CAPTAIN ORDERED THE EVACUATION OF THE AIRPLANE AS A PRECAUTIONARY MEASURE. FOLLOWING THE EVACUATION THE AIRPLANE WAS EXAMINED, NO EVIDENCE OF HEAT OR FIRE WAS FOUND. HIGH SPEED TAXI AND BRAKING OPERATIONS WERE PERFORMED, NO SMOKE OR HEAT WAS GENERATED