 dependent full stokes and anti-stokes Raman spectra with 532 nm laser source. Similar mode softening is observed at room temperature as well as 150 K and overall change in frequency (Ag mode) between minimum to maximum laser power with 532 nm laser source is 7.9 cm -1 at 300 K and 7.3 cm -1 at 150 K and that at fixed 1.69 mW laser power it is observed to be 7.1 cm -1 shift as the temperature is increased from 300 K to 700 K. (details of Ag mode softening with varying laser power and with varying temperature is highlighted in the supplementary information Fig., S4 with contour plot). We also recorded Raman spectra with 633 nm laser source.  increasing power, and this trend is similar to the temperature variation of Ag mode at fixed laser power. In this case also, we have considered the effect of laser heating for temperature dependent measurements. Measurement at the highest laser power (9.39 mW) at room temperature increased local temperature to 690 K. Even though a similar trend is observed in power and temperature dependent Ag mode softening with respect to local temperature, a considerable deviation is observed with 633 nm laser source. We have also calculated mode softening with respect to laser power and temperature with 473 nm laser source, the variation looks similar to the 532 and 633 nm laser sources, (see Fig.S3 supplementary information). However, the 473 nm laser source, we are unable to calculate the local temperature effect with increasing laser power (We are unable to collect anti-stokes line by Horiba JY make HR-800 Raman instruments because of absence of notch filter).

Results and Discussion:
It is to be noted that the mode softening with increasing laser power is not the same for all the 473 nm, 532 nm and 633 nm laser sources. It is observed that with the increase in wavelength, softening of the Ag mode becomes more prominent for the same power difference, i.e. the Ag mode softening in 633 nm laser source is higher than 532 nm laser source for same laser power (see Fig.   S4, S5 in supplementary information) [28]. So, SMO becomes more photoactive towards higher frequency region (UV-VIS-IR). In our SMO film, the laser induced local temperature rise is high enough (for this kind of granular surface morphology). Generally high number of grain boundaries reduces the effect of local temperature, because most of the absorbed photon energy is absorbed by the free electrons at the grain boundary [32][33][34][35][36][37], which contribute to the photocurrent as well. The substrate induced local distortion can modify the crystal field in 4H-SMO compound [24,25].
In our present study we also notice light induced changes in local structure (from the blue shift of Ag mode upon light illumination) modifying the crystal field and effective p-d hybridization in this compound.
So, far it is evident that the SMO thin film generates huge local temperature rise upon laser light illumination. However, it needs to be probed if all the absorbed photon energy is spent in the local heating, or some parts of absorbed photon energy is participating in electron transport mechanism!
To address this issue, we performed photocurrent measurements with different laser source with different power, along with temperature dependent resistivity measurements. resistivity measurement of SMO film, and extrapolated the data for high temperature. Fig. 8 (inset i4) represents resistance (R) versus temperature (T) of grown SMO film, which reveals decrease in resistance with increasing temperature. So, increase in photocurrent with high power laser source is mainly due to decrease in resistivity with increase in local temperature.

Discussion:
In this present study, we observed that SrMnO3 interacts with a broad optical frequency range. Local structure of SrMnO3 is also modified while interacting with light, resulting in changes in its crystal field and pd hybridization. From Raman stokes and anti-stokes ratio we observed huge local temperature enhancement during laser illumination. 532 nm laser illumination at 9.18 mW laser power causes increase in local temperature up to 740 K, while 633 nm laser illumination at 9.38 mW laser power increases the local temperature around 690 K. So, at comparable laser power illumination, red light induced a relatively smaller local temperature rise with respect to green laser. We have analyzed temperature dependent Raman spectra at a fixed  [38]. However, in the present study we observed the photo-sensing phenomena even for laser energy values lower than the band gap of SMO.

Conclusion:
We have successfully grown stoichiometric 4H-SrMnO3 thin film on optically transparent quartz substrate. From power dependent Raman measurements, it is confirmed that the local structure of this SrMnO3 thin film is modified with increasing laser power, and local structure modification with 9 mW laser illumination (with 532 nm and 633 nm) is similar to 1.2 % substrate induced distortion in this structure. From our Raman stokes and anti-stokes measurements, we observed high local temperature rise, for instance the local temperature at 300 K is enhanced to 700 K when illuminated with 532 nm lasers source at 9 mW. In correlated perovskite system, this high temperature rise is rare, particularly for granular morphic structure.
Mode variation with respect to power and temperature is very similar for 532 nm laser source, while it is slightly diverted for 633 nm laser source. At the same time, we observed maximum photocurrent with 633 nm light source. By definition, photostriction must be a non-thermal phenomenon, on this basis BiFeO3 is considered as a photostrictive material. However, a very recent report claims that during laser illumination, local temperature (from stokes anti-stokes ratio) in BiFeO3 also increases hugely [7], and domain structure variation in epitaxial BiFeO3 with laser light at fixed temperature and with temperature variation at fixed laser light source are similar.
Even giant photostrictive SrIrO3 thin film also shows temperature dependent structural distortion.
So local temperature measurements in all such cases are debatable issue [39,40]. In our report we propose SrMnO3 as a photosensitive material. Even in a granular relaxed structure, it generates 10 huge local temperature throughout entire optical range, and local distortion increases towards infrared regime. Our finding will help us to explore this system as a solar power heater, local thermal insulating materials for thermal energy storage (TES), noncontact infrared thermometer, and as a backlit display material in future.

Acknowledgements:
Raman Shift (cm -1 ) Intensity(a.u.) 300 K     group). Calculated lattice parameters of the single phase grown film is a = b = 5.45 Å and c = 9.085Å. Fig S1 (a) (inset) represents XPS survey scan of the grown film, revealing that the grown film does not contain any impurity element. For a better understanding of oxygen stoichiometry and chemical charge state of manganese, we performed XAS, and all the details can be found in the main article. Fig S1 (b) shows the AFM image of the grown film recorded in the contact mode, which reveals that the grown film is granular in nature. The measured value of RMS roughness is around 1.2 nm. Fig. S1 (c) is the fitted (Tauc) plot of UV-Vis spectra of the grown film, and the calculated optical band gap of the grown film is 2.5 eV. From XRR, we calculate the film thickness, and it is estimated to be 45 nm (Fig. S2).At 16, when I was the only one of my friends who could drive, I picked up my friends from all over Jacksonville and brought them there for days of fun in the sun. Sometimes I wouldn’t even have a bathing suit, deciding to go on a whim, and it became my friend Sabby’s joke that I wore her bathing suits more than she did. We bonded a lot at the beach. The sound of the waves and the wind against the sand made us feel safe enough to share the secrets of our past with each other. During one not so pleasant time, we got caught in a rip tide and (bravely but later I would learn incorrectly) fought it together straight ahead toward the shore. “I won’t let you drown, Becca!” is a laughable statement to us now, having lived to tell the tale. Another one of my closest friends, Chris, feels a powerful affinity for the water. He drew his own tattoo sleeve—a visage of swirling teal water— and it now covers his upper arm. Even before its existence we walked the moonlit stretches of that beach together and now after its existence we plan to do the same for as many years as we are able. It’s there in the darkness that we feel safe, and it is only then that we let the ocean hear our fears and doubts about the future.
Needless to say, when I heard about the Florida Coastal Cleanup Day, I immediately knew which beach I wanted to clean. Sylvia Earle’s “The World is Blue” has a chapter on “The Ultimate Garbage Disposal,” and it is (sadly) the ocean that she’s referring to in that title. In a similar cleanup day in September 2008, over 6.8 million pounds of trash was collected by volunteers on beaches all over the world. According to statistics gathered, cigarette butts and plastic were the top two trash items collected, “with the top ten categories accounting for 83% of the total” (106). These statistics became tragically real to me as I cleaned my special stretch of beach that Saturday. I expected to find a minimal amount of trash. Instead, I was appalled at how many cigarette butts hid themselves just under the sand, and even more stressed to find an entire