Researchers at the University of Science and Technology in China have successfully demonstrated a new approach to male contraception in mice using gold nanorods. Following a single injection of a solution containing the nanorods into the testes of the mice, an infra-red laser was used to heat the nanorods to between 37 and 45 degrees Celsius. Depending on the extend of irradiation the mice were either temporarily sterilised (fertility recovered to about 50% after 60 days) or permanently sterilised (temperatures around 45 degrees Celsius kill sperm producing cells and not just sperm cells).
This technique still requires further investigation in animal models, but as a non-surgical, non-drug approach to male contraception it certainly looks promising, though I suspect most male readers would shudder at the thought of a testicular injection.
More details about this new technique can be found here