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Questions related from Jeong Bin Cho
I heard that the intensity-dependence on the PL of the one-photon absorption is generally linear. However, the intensity of PL at two-photon absorption increases to the quadratic power of the...
31 July 2024 4,706 3 View
Even though multi-photon absorption is fascinating phenomenon, recently I am agonizing about its applicability. Second harmonic generation is used in lasing materials or so, however, I have never...
29 April 2024 2,859 1 View
what I've heard is the self-trapped exciton is another name of small polaron. But can I ask what the difference and definition of self-trapped exciton and polaron? Sincerely,
22 December 2023 4,162 0 View
Recently we obtained TCSPC system, but, spec of our main laser has pulse width 30-ps, and 50 Hz repetition rate. So, it seems the laser diode that give us the input time seems not detecting the...
22 November 2023 9,906 1 View
we are looking for the THG phase-matching materials that is stable in the air. but we cannot find it. Like AgGaSe2 in SHG, is there a good THG phase-matchable (around 1800 nm excitation) reference...
23 June 2023 9,394 0 View
As you know, Beer-Lambert law is I=I0exp(-a*d) where a is absorption coefficient and d is sample thickness. my question is if a ~104 cm-1 and d ~ 100 um, the I would be quite small compare to...
09 May 2023 9,893 5 View
recently I am building home-made UV-Vis absorption spectrum set-up in our lab, but the big problem is happened. What I am going to do is obtain absorption spectrum of perovskite, but, as PL of it...
02 February 2023 8,828 5 View
