Raman
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Analysis and control of Raman phonon dynamics for enhanced optical frequency conversion
Announce Type: replace Abstract: Raman phonons are quantized molecular motions that arise from the inelastic scattering of light and mediate a wide range of spectroscopic and nonlinear optical phenomena. These can play a major role in frequency-conversion processes, but commonly-used theoretical treatments based on the Raman gain spectrum largely neglect the phonons and their dynamical interaction with the field. In this work, we clarify the physical role of Raman phonons within a...
Circular Raman responses from angular-momentum inequivalence in CoSi
arXiv:2606.06909v1 Announce Type: new Abstract: Circularly polarized Raman scattering in solids exhibits distinct phenomena such as Raman optical activity (ROA) and chiral-phonon-induced frequency splitting, whose relationship has remained unclear. Here we show that these seemingly different responses can be understood within a common framework based on the inequivalence of phonon states carrying opposite crystal angular momenta. Using helicity-resolved Raman spectroscopy of the chiral...
Nithya Raman advances over Spencer Pratt to face L.A. Mayor Karen Bass in a runoff
Los Angeles Mayor Karen Bass will face City Council member Nithya Raman in a runoff election for Bass’ job in November, NBC News projects, teeing up a one-on-one matchup between two Democrats. Bass and Raman, who is a member of the Democratic Socialists of America, emerged from a crowded all-party primary field that included former reality TV star Spencer Pratt, a registered Republican who ran an insurgent campaign focused on criticizing Bass for her response to the Los Angeles wildfires...
Spencer Pratt's runner-up edge over Democrat Raman down to 1%, few thousand ballots
Spencer Pratt’s independent bid to make the Los Angeles mayoral runoff hangs in the balance nearly a week after Election Day. With the jungle primary leaving incumbent Democrat Mayor Karen Bass already ruled to have advanced to a November runoff, Pratt's margin over Democrat City Councilmember Nithya Raman has slimmed to just 1% with a few thousand ballots left to make up the difference. Pratt led Raman by just 7,494 votes in the latest AP elections tally with 78% of the vote counted to date.
Spencer Pratt's runner-up edge over Democrat Raman down to 1%, few thousand ballots
Spencer Pratt’s independent bid to make the Los Angeles mayoral runoff hangs in the balance nearly a week after Election Day. With the jungle primary leaving incumbent Democrat Mayor Karen Bass already ruled to have advanced to a November runoff, Pratt's margin over Democrat City Councilmember Nithya Raman has slimmed to just 1% with a few thousand ballots left to make up the difference. Pratt led Raman by just 7,494 votes in the latest AP elections tally with 78% of the vote counted to date.
Nithya Raman: progressive who bested Spencer Pratt eyes Hollywood ending
Raman shook up LA mayoral race by entering hours before the deadline – now she faces her one-time political allyRaman advances to face Karen Bass in LA mayoral runoffOn election night, Nithya Raman seemed as if she was prepared to lose the second spot in the Los Angeles mayoral race to the reality TV star Spencer Pratt, whose viral campaign appeared on track to upend the contest. “Many thousands of votes will be counted in the days ahead, and we may not get an answer we like. But regardless...
Achiral crystal reveals Raman optical activity through ferroaxial order
Raman optical activity, long thought to require chiral molecules or magnetic order, has been demonstrated in an achiral, nonmagnetic crystal by researchers at the Institute of Science Tokyo. The effect arises through ferroaxial order, a coordinated rotation of atoms within the lattice, and is detected using circularly polarized Raman spectroscopy. The findings show that optically inactive materials can also display chirality-like optical responses and expand the scope of optical techniques...
Raman overtakes Spencer Pratt in razor-thin race, AP count shows, but race remains uncalled
Los Angeles City Council member Nithya Raman has overtaken reality television star Spencer Pratt in the latest Associated Press vote count, although the outlet has not called the race. Pratt, a Republican, had led earlier in the day, but the latest tally now shows Raman, a Democrat, ahead by more than 3,000 votes, or about 0.4 percentage points, in the officially nonpartisan mayoral race. Incumbent Mayor Karen Bass, a Democrat, has already advanced to a runoff as she seeks a second term.
Nithya Raman edges out Spencer Pratt to face Karen Bass in LA mayoral runoff
Progressive challenger to face incumbent mayor in November as former reality star Pratt trails behindNithya Raman, a progressive Los Angeles city council member, has advanced to the November runoff for LA mayor, edging out former reality TV villain Spencer Pratt for the chance to face incumbent mayor Karen Bass. Pratt, who decided to run for mayor after his Pacific Palisades home burned down in the 2025 wildfires, held a lead over Raman for days. But as ballot processing from last week’s...
Raman overtakes Spencer Pratt in razor-thin race, AP count shows, but race remains uncalled
Los Angeles City Council member Nithya Raman has overtaken reality television star Spencer Pratt in the latest Associated Press vote count, although the outlet has not called the race. Pratt, a Republican, had led earlier in the day, but the latest tally now shows Raman, a Democrat, ahead by more than 3,000 votes, or about 0.4 percentage points, in the officially nonpartisan mayoral race. Incumbent Mayor Karen Bass, a Democrat, has already advanced to a runoff as she seeks a second term.