Here he developed interest in the low-temperature spectroscopy, studied quantum mechanics and group theory, and very soon became an active and inventive experimental physicist.
In his first break-through papers Broude discovered in the low-temperature spectra of crystalline benzine a triplet of absorption bands strongly polarized along the crystallographic axes.
[1][2] Methodically, this success was only possible thanks to a breakthrough in experimental techniques, the invention of a microprocessor that allowed taking spectra of minor crystallites in polarized light.
This started with the spectra of dilute solutions[5] in which the giant oscillator strength of impurity excitons was identified and the position of lower energy band of crystalline naphthalene was established.
[7] In 1966, Broude moved to Chernogolovka (Moscow district) to a newly established Institute of Solid State Physics, where he founded a Laboratory of optics and spectroscopy.