Optical Response of Gas-Phase Atoms at Less than<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>λ</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mn>80</mml:mn></mml:math>from a Dielectric Surface
Physical review letters