Which type of lasers allow for selective heating of specific targets?

Selective photothermolysis refers to a specific laser technique that allows for the targeted heating of certain tissues or chromophores in the skin without affecting the surrounding area. This principle is based on the concept that certain wavelengths of light are absorbed by particular targets, such as hair follicles or pigmented lesions, which can then be selectively destroyed or treated by heating.

In selective photothermolysis, the laser light is precisely tuned to the optimal wavelength that coincides with the absorption spectrum of the intended target, allowing for effective treatment while minimizing damage to adjacent tissues. This method is widely used in various dermatological and esthetic procedures, such as hair removal and the treatment of vascular lesions.

The other options do not specifically denote a technique centered on the selective targeting of specific tissues: continuous wave lasers maintain a steady output without pulsing, diode lasers refer to a category of lasers used in various applications but do not inherently imply selective heating, and argon lasers are a specific type of laser often used for generating blue-green light but are not limited to or specifically meant for targeted selective heating.

Thus, selective photothermolysis stands out as the correct answer due to its unique ability to provide targeted thermal effects on specific tissues.